42 results about "Continuity equation" patented technology

The invention belongs to the related technical field of heat dissipation of electronic equipment, and discloses a liquid cooling device and a preparation method and application thereof, and the method comprises the steps: S1, enabling a control equation of the liquid cooling device to be equivalent to a continuity equation, an N-S equation and a heat transfer equation based on equivalent parameters; s2, taking the minimum average temperature and energy dissipation of the whole design domain of the liquid cooling device as a target function, taking the volume fraction of the fluid domain as a constraint condition, and constructing a topological optimization model based on a continuity equation, an N-S equation and a heat transfer equation; s3, an optimization solver is adopted to carry out iterative solution on the topological optimization model, whether a result meets a convergence condition or not is judged, if yes, a topological structure is output, and the step S4 is executed; otherwise, updating the design variable of the topological optimization model, and turning to the step S1; and S4, the three-dimensional model of the liquid cooling device is corrected based on the obtained topological structure, and then blowing forming is carried out based on the corrected three-dimensional model to obtain the liquid cooling device. According to the invention, the cost is reduced.

The invention relates to the technical field of oil and gas field development, and provides a method, device and equipment for analyzing the pressure drop of a serpentine well. The method comprises the steps that micro-arc section extraction and basic parameter setting are conducted on the serpentine well; according to the set basic parameters, micro-arc section flow characteristic analysis is conducted, and in combination with a fluid continuity equation and a momentum conservation equation, a serpentine well horizontal section single-phase pressure drop gradient prediction model is established; predicting pressure gradient data in the serpentine well by using the serpentine well horizontal section single-phase pressure drop gradient prediction model; and the serpentine well is set to adopt fixed bottom hole flowing pressure production, and the pressure drop of the horizontal section of the serpentine well is calculated by adopting a pressure drop superposition method according to the pressure gradient data in the serpentine well. According to the method, the influence of the geometrical morphology change of the shaft on fluid flow is effectively described, especially the continuous change of the gravity component along with the hole drift angle, and the inherent defect that a traditional model simplifies the shaft into horizontal flow is overcome.

The application discloses a method for calculating critical submerged water depth of a side-type water inlet based on a CSSS method. A point sink spherical critical surface model is constructed, and a conservation relationship between an effective working area and a radial flow velocity is established based on a continuity equation. For complex boundary working conditions, a dimensionless criterion is introduced to determine the effectiveness of the spherical assumption, and when the spherical assumption is invalid, an anisotropic ellipsoid correction is started, and a coordinate stretching equivalent method is used to calculate a limited effective area. A physical correction coefficient is constructed by using a potential flow geometric component and a dynamic loss component to replace pure statistical regression. A dynamic safety margin is calculated in combination with a vortex evolution time scale. The application solves the problem of prediction distortion of the critical water depth under a complex flow field, and improves the physical precision and operation safety of engineering design.

The invention relates to the technical field of fluid mechanics, and discloses a method for determining a volume evolution model of a Newtonian fluid liquid film under the action of shear airflow, and the method comprises the following steps: determining the thickness of the liquid film; determining an equilibrium equation based on set conditions; determining an expression of shear force of the liquid film surface according to the liquid film thickness and the liquid film surface speed; determining an expression of shearing force of the shearing airflow to the liquid film; substituting the two expressions into an equilibrium equation to obtain a liquid film surface velocity equation; determining a liquid membrane continuity equation and a liquid membrane internal velocity equation; substituting the liquid film internal velocity equation and the liquid film surface velocity equation into a liquid film continuity equation to solve the time evolution process of the liquid film, and obtaining differential equations of liquid film volume evolution under the action of uniformly accelerated shear airflow and uniform shear airflow, so as to construct a model; the model has high accuracy for the volume evolution rule of the Newtonian fluid membrane.

The application discloses a kind of construction method and system of gate control water network digital twinborn model, including using Preissmann four-point implicit difference format to the conversion of the continuity equation and momentum equation of St.Venant equation group;Channel water conveyance internal compatibility condition equation is constructed, and constant flow and non-constant flow equation in water network water conveyance are established, according to the external boundary condition of the water network channel set, calculate water network flow state;Internal compatibility condition equation is constructed at the branch point of water network, according to the internal compatibility condition equation of gate in water network channel, calculate the flow of regulating gate;The water network model of the application is compared and verified with physical model test, prototype observation experimental data, and further parameter adjustment is satisfied to water level flow accurate simulation requirement.The application accurately and practically reflects the running state of water network in virtual state space model, and can solve the state simulation and accurate prediction problem of gate control water network under various complex operating conditions.

This application relates to the field of gas transportation technology, and provides an equivalent inertia correction method and apparatus for a lumped parameter model of a gas pipeline. The method includes: generating a lumped parameter model of the gas pipeline based on the continuity equation and momentum equation of a one-dimensional compressible gas; generating an equivalent inertia factor based on the equation of state of a real gas under isothermal conditions; wherein the equivalent inertia factor characterizes the nonlinear sensitivity of the compressibility factor of the real gas to pressure; correcting the equivalent inertia of the lumped parameter model based on the equivalent inertia factor; and updating the boundary values ​​of the lumped parameter model after correction based on the fluid sound velocity under the current operating conditions of the gas pipeline and the pipeline length constraint when a system disturbance occurs. The method provided in this application effectively compensates for the inertial distortion caused by lumped averaging of material properties and solves the global phase shift problem under complex operating conditions.

The invention relates to a cavitation numerical simulation method based on consideration of a multiphase flow shear state, and the method comprises the steps: initializing basic parameters of a navigation body, the basic parameters including the shape, the length, the underwater navigation speed, the global cavitation number and the like; constructing a mathematical model based on the preprocessing matrix, wherein the mathematical model based on the preprocessing matrix comprises a continuous equation, a momentum equation, a component transport equation based on cavitation vapor phase volume fraction, a turbulence model equation and a cavitation model considering a multiphase flow shear state; constructing a flux calculation model adopting a windward format; constructing a grid for the wall surface of the navigation body; initializing flow field setting for the navigation body; and based on the basic parameters of the navigation body, the mathematical model based on the preprocessing matrix, the flux calculation model, the grid constructed for the wall surface of the navigation body and the flow field setting initialized for the navigation body, carrying out cavitation numerical simulation calculation on the navigation body.

The application discloses a kind of double box girder flow field dynamics modal and flow stability analysis method and system, belong to bridge engineering field.This method first establishes double box girder flow field model by computational fluid dynamics, solves the momentum equation and continuity equation of two-dimensional incompressible flow;Dynamic modal decomposition is carried out again, and eigenvalue, characteristic mode and other information are obtained;Finally, based on linear stability theory, the flow field component is expressed as the sum of steady-state solution and disturbance term, and the global linear flow stability equation is obtained by substituting into the equation, and the flow stability is analyzed by discrete.This method can accurately extract the modal characteristics of each order, providing a scientific basis for wind-induced vibration analysis of double box girder, and has important application value.The method of the application occupies less computing resources, has high numerical accuracy, and can be further expanded to higher precision calculation model according to computing resources, and is suitable for application in actual bridge engineering.

The application provides an unconventional oil and gas reservoir thermal fluid-solid coupling numerical simulation method and system, and the method comprises the following steps: constructing a multiphase numerical model coupling a temperature field, a seepage field and a stress field; the multiphase numerical model integrates a Cahn-Hilliard equation, a heat conduction equation, a continuity equation, a Navier-Stokes equation and a mechanical equilibrium equation; determining a model calculation domain of the multiphase numerical model; performing grid discretization processing on the model calculation domain and performing grid refinement processing on the periphery of a mass flow inlet and a pressure outlet, thereby obtaining a plurality of grid units; inputting environmental parameters and initial condition parameters into the multiphase numerical model, controlling the multiphase numerical model to perform discrete calculation in each grid unit, judging whether a convergence condition is met, if the convergence condition is met, updating physical property parameters of a multiphase fluid according to a current temperature and pressure, and outputting a numerical simulation result of the unconventional oil and gas reservoir. The application can reduce the production capacity prediction deviation.

A fluid-structure interaction (FSI) simulation method for submerged boundaries based on the material point method and positional dynamics includes: a) solving for the solid state and calculating the Lagrangian elastic force of the solid; b) transferring the elastic force of the solid Lagrangian mesh vertices to the Eulerian background mesh; c) solving the Navier-Stokes fluid control equations and continuity equations on the Eulerian background mesh, feeding back the updated mesh flow field information to the particles, and updating the particle state synchronously; d) using a mapping matrix to map the positions of solid particles back to the vertices of the solid Lagrangian mesh, saving the vertex position data and fluid particle data for rendering output. This invention, through the above-mentioned hybrid Lagrangian-Eulerian perspective coupling solution, can realistically simulate the bidirectional coupling between solids of different materials and complex fluids, significantly improving the physical realism and visual fidelity of the simulation scene.

The invention discloses a method for calculating the critical submerged water depth of a side water inlet based on a CSSS method. According to the method, a point sink spherical critical plane model is constructed, and a conservation relation between an effective working area and a radial flow velocity is established based on a continuity equation. For a complex boundary working condition, a dimensionless criterion is introduced to judge the effectiveness of a spherical hypothesis, anisotropic ellipsoid correction is started during failure, and a coordinate stretching equivalent method is utilized to calculate a limited effective area. A potential flow geometric component and a dynamic loss component are adopted to construct a physical correction coefficient, and pure statistical regression is replaced. And calculating a dynamic safety margin in combination with a vortex evolution time scale. According to the method, the problem of critical water depth prediction distortion in a complex flow field is solved, and the physical precision and operation safety of engineering design are improved.

This invention relates to the field of geological engineering, specifically to a method and system for quantitatively analyzing the diffusion effect of synergistic grouting in water-rich soft rock fracturing and seepage. The method includes: conducting parameter tests and obtaining time-varying characteristic parameters through orthogonal experiments; establishing a coupled dynamic model including the grout volumetric flow rate equation, seepage motion equation, and flow continuity equation to obtain the spatiotemporal distribution of the grout field, the flow distribution coefficient of the dual-domain coupling, and the grouting parameters at different grouting times; constructing an index system with synergistic effects and obtaining quantitative values ​​of the diffusion effect. This invention constructs a dual-domain coupled dynamic model that couples the grout volumetric flow rate equation, seepage motion equation, flow continuity equation, and stress continuity equation, modifies the classical flow law to adapt to the grout yield stress characteristics, and achieves transient analysis through finite element numerical solution. It can output the spatiotemporal distribution of the grout field, the flow distribution coefficient, and the grouting parameters, and determine the micro-zone division boundary threshold based on experimental data.

The invention discloses a water hammer oscillation blockage removal method based on disturbance equation modeling, and relates to the technical field of oil and gas field exploitation and shaft physical blockage removal. Constructing boundary conditions of the negative pulse return-to-zero type switching valve; constructing a disturbance continuity equation and a disturbance momentum equation; the gravity influence is eliminated, and a water hammer wave disturbance equation set is built in combination with the pipeline friction coefficient; according to the interval and the time step length when the target shaft is dispersed, on the basis of the boundary condition of the negative pulse return-to-zero type switching valve, finite difference discrete processing is conducted on the water hammer wave disturbance equation set, and water hammer wave transient control equation sets corresponding to all depth nodes are obtained and solved in parallel; and pressure distribution and speed distribution of the water hammer waves in the propagation process in the target shaft are obtained, and then parameters of water hammer oscillation unblocking operation of the target shaft are designed or adjusted. According to the method, the water hammer wave disturbance equations suitable for different well types are constructed, the gravity effect requirement is eliminated, well depth and channel friction factors are uniformly incorporated into a modeling framework, and high-precision description of the transient propagation process of the water hammer waves is achieved.

Systems and methods optimize hydrodynamic modeling using a physical information neural network (FINN) and a deep neural network (DNN). The DNN is trained to create a data-driven mapping of invariants and Reynolds stress tensors associated with the fluid field based on the simulated data. The FINN is trained using losses based on the Navier-Stokes and continuity equations, using a Reynolds stress tensor correction term derived from the mapping, and invariants and tensors derived from the estimated flow field variables. The FINN input includes boundary conditions, as well as spatio-temporal coordinates of sampling points in the fluid flow field that describe temporal evolution of turbulence problems depending on geometric boundaries of the flow field.

This invention relates to the field of textile engineering technology, specifically to a method and system for controlling the flow field of vortex spinning in a ring-gradient spiral manner. The invention analyzes the geometry of the ring-gradient spiral composite channel, constructs geometric parameter analysis equations for the spiral groove to obtain parameters such as pitch, helix angle, and groove depth. Based on the continuity equation and the aforementioned geometric parameters, it derives the velocity field coupling equations under simultaneous variations in groove depth and pitch. It analyzes momentum conservation and pressure distribution based on the velocity field coupling equations, constructs a quantitative model of yarn dynamics and aerodynamic performance, and a comprehensive efficiency analysis formula for the yarn guide tube. Combining the comprehensive efficiency analysis formula, momentum conservation and pressure distribution, and the velocity field coupling equations, it designs the inlet pitch, outlet pitch, groove depth attenuation, and number of spiral turns of the ring-gradient spiral composite channel to achieve flow field control in vortex spinning. This invention improves the stability and yarn quality of vortex spinning, reduces energy consumption and production costs, and provides support for the development of vortex spinning technology.

This invention relates to the field of electronic digital data processing technology and discloses a method for generating structural parameters of a static mixer. The method includes: selecting the inclination angle of the crossbars and the aspect ratio of the mixer as structural parameters to be optimized, with the optimization objectives being minimizing the relative standard deviation of the concentrations of each component at the outlet section and minimizing the pressure drop; constructing a three-dimensional geometric model of the static mixer based on the structural parameters and setting the inlet and outlet positions; solving the flow field based on the Navier-Stokes equations and the continuity equation, and solving the concentration field of each component based on the convection-diffusion equation; obtaining the concentration distribution and pressure drop data of each component at the mixer outlet section under different structural parameters through multiphysics simulation, and calculating the relative standard deviation of each component concentration; screening structural parameter combinations with relative standard deviations less than a threshold, and selecting the one with the smallest pressure drop as the optimal structural parameter. This method solves the problems of reliance on trial and error and long cycles, achieving the goals of high accuracy, high efficiency, and low cost.

The present application relates to a kind of debris flow movement dynamics simulation method and system, wherein the method comprises: determining debris flow movement dynamics control equation according to the flow rate of debris flow fluid;Debris flow movement dynamics control equation includes continuity equation and momentum equation;Debris flow fluid density is obtained according to debris flow movement dynamics control equation;The amount of suspended sediment of suspended sediment and the single-width sediment transport rate of bed surface layer sediment are determined according to the density of debris flow fluid;The thickness of moving load layer is determined using the thickness calculation formula of moving load layer;The shape of the bottom of debris flow gully is calculated using the amount of suspended sediment of suspended sediment, the single-width sediment transport rate of bed surface layer sediment and the thickness of moving load layer thereof.The present application obtains the amount of suspended sediment of suspended sediment, the single-width sediment transport rate of bed surface layer sediment and the thickness of moving load layer thereof based on debris flow movement dynamics control equation, and based on this, the shape of the bottom of debris flow gully can be more accurately calculated, which provides a basis for the design of foundation depth of prevention and control engineering.

The application discloses a positioning method for an ultrasonic flowmeter for an elbow-shaped flow channel, and comprises the following steps: building a model experiment table of an inlet section of a pump station to be measured with an elbow-shaped flow channel as a water inlet flow channel, setting a PIV test device, and defining a three-dimensional rectangular coordinate system of the inlet section of the elbow-shaped flow channel in the model experiment table; using the PIV test device to sequentially perform PIV two-dimensional flow field measurement on each to-be-measured cross section to obtain two-dimensional flow velocity vectors of each to-be-measured cross section; performing two-dimensional interpolation on the two-dimensional flow velocity vectors of each to-be-measured cross section to obtain a two-dimensional flow velocity field of a flow measuring section, introducing a continuity equation as a physical constraint to perform three-dimensional interpolation on the two-dimensional flow velocity field to realize three-dimensional flow field reconstruction of the flow measuring section; and calculating turbulent kinetic energy at each position in the flow measuring section according to the reconstructed three-dimensional flow field, and taking a position with minimum turbulent kinetic energy as an installation position of the ultrasonic flowmeter. The application reconstructs a complex three-dimensional flow field inside the elbow-shaped flow channel through PIV, and provides an experimental basis for selection of the installation position of the ultrasonic flowmeter.

The present application relates to the calculation method of rock mass permeability coefficient based on seepage-stress coupling high pressure water pressure test, the calculation method includes the following step content: (1) seepage continuity equation; (2) stress control equation; (3) flow calculation formula.The permeability coefficient result obtained by the present application is more accurate and reliable, a large amount of time and cost are saved, and another more actual calculation method for obtaining the permeability coefficient of high pressure water pressure test is provided.

This invention discloses a method for calculating the steady-state seepage field of a foundation pit in a low-permeability soil layer, comprising: S1: simplifying the target foundation pit into a circular foundation pit using the principle of area equivalence; S2: establishing a three-dimensional seepage model of the foundation pit in a homogeneous soil layer based on the circular foundation pit; S3: determining the boundary conditions based on the three-dimensional seepage model of the foundation pit in the homogeneous soil layer; S4: obtaining the homogeneous differential equation of seepage continuity in spherical coordinates based on Hansberg's seepage law considering nonlinear seepage characteristics and the seepage continuity equation under the boundary conditions; S5: separating the variables of the homogeneous differential equation of seepage continuity to obtain the homogeneous differential equation after variable separation; S6: obtaining the pore water pressure and the water inflow at the bottom of the foundation pit at each point in the steady-state seepage field outside the foundation pit based on the homogeneous differential equation after variable separation and the boundary conditions. This invention can solve the problem of low permeability coefficient caused by the failure to consider nonlinear seepage factors in existing seepage field calculations.

The application discloses a three-dimensional meshless numerical simulation method for water dynamic characteristics of a net. The method comprises the following steps: obtaining a net to be numerically simulated; constructing a fluid motion control equation according to a continuity equation and a momentum equation, and performing discrete processing on the fluid motion control equation based on a smoothed particle hydrodynamics method, and combining a wave making function to construct a meshless numerical water tank; performing Lagrange type particle discrete processing on the net according to the shape of the net, and combining a screen model to construct a Lagrange type net particle model; reading the Lagrange type net particle model into the meshless numerical water tank, and performing meshless coupling calculation on the net and the fluid in each time step to obtain fluid resistance received by the net. The application realizes numerical simulation of water dynamic characteristics of the net under complex marine environment by adopting the smoothed particle hydrodynamics method to disperse the fluid control equation, and can be widely applied to the field of marine engineering technology.

The application discloses a fluid-solid coupling numerical simulation method, device, equipment and medium, the method comprises the following steps: selecting a fluid-solid coupling calculation domain, generating a calculation grid, and marking the calculation domain according to fluid and solid distribution information; determining the solving time step and the discrete format, selecting the control equation group for solving, the control equation group includes continuity equation, fluid dynamics equation, solid dynamics equation and phase transmission equation; the solving result is analyzed and displayed. The application provides a global unified calculation, an efficient fluid-solid coupling numerical simulation method without explicit fluid-solid decoupling, adopts global fluid-solid coupling body dynamics equation, avoids the error caused by the traditional phase solving method to the fluid-solid decoupling processing, and does not need to depend on and repeatedly generate complex body grid; the control equation is based on the phase conservation equation on the physical continuous domain and realizes the accurate correlation between phases through the interface continuity condition, and the fluid-solid coupling problem can be accurately and quickly solved.

The invention discloses a subsea tunnel full life cycle supergravity simulation method, which comprises the following steps: firstly, constructing a supergravity test physical model, calibrating a phase field function, and simultaneously constructing a two-phase flow model of a subsea tunnel in a supergravity environment based on a continuity equation, a momentum conservation equation and a phase field equation; and then initializing a two-phase flow model based on the calibrated phase-field function, performing loop iteration of the two-phase flow model, completing change updating of the full life cycle of the subsea tunnel in the supergravity environment, and realizing iterative simulation of the full life cycle change condition of the tunnel in the constant gravity environment. According to the method, the landslide process is reproduced through physical simulation in the supergravity environment, structural response is analyzed by means of calculation of a numerical model, and the landslide action mechanism and the tunnel failure mode are further systematically revealed.

This invention provides a method, system, and device for detecting and locating leaks in water supply pipes based on a probabilistic model and nonlinear filtering. The method includes: acquiring information about the water supply pipeline, such as the length, diameter, friction, and elastic modulus of each pipe; constructing a pure hydraulic model based on the water supply network information; solving the continuity and momentum equations of the water supply network using the method of characteristics; establishing a probabilistic multiple leakage model based on the circumferential stress and yield stress of the pipes, combined with the solution of the differential equation system, to determine the location and quantity of leaks in the pipeline; and using nonlinear filtering to estimate the state space in a noisy environment to achieve real-time correction and prediction of leaks. This invention considers the situation of multiple leaks in the water supply network and the water pressure difference between horizontal and non-horizontal pipes. Starting from a pure hydraulic model, it effectively solves the original partial differential equation system using the method of characteristics, effectively reducing the high false alarm rate problem of deterministic models.

The invention discloses a coupling characterization method for multi-component variable mass fluid in a shaft. The coupling characterization method comprises the following steps: establishing a gas component-thermophysical property dynamic incidence matrix; through thermodynamic coupling calculation, the influence of the reaction process on the flow in the shaft is dynamically reflected; establishing a three-dimensional shaft control body, and simultaneously establishing a variable mass continuity equation, a momentum conservation equation and an energy conservation equation; boundary conditions are set, meanwhile, distributed heat source items are embedded in catalytic reaction sites, local component mass source items are synchronously updated, and a constraint system conforming to actual working conditions is provided for equation solving; and adopting an SIMPLER algorithm, carrying out iterative calculation through an iterative strategy until the residual error of the energy equation and the component transport equation meets the requirement, outputting the on-way temperature field and pressure field data of the shaft, and generating a dynamic map. According to the method, the complex conditions of variable temperature, variable pressure and variable components in the shaft can be responded in real time, and high-fidelity depiction of the real physical and chemical process can be achieved.

A mechanism-data dual-driven landslide surge big data generation method comprises the following steps: 1, data preprocessing: carrying out missing value processing, abnormal value removal and standardization operation on original landslide surge data to obtain preprocessed data; 2, data enhancement is carried out, the preprocessed data obtained in the step 1 are input into an improved TimeGAN model, the improved TimeGAN model takes a fluid mechanics continuity equation and a momentum equation as regularization terms to be embedded into a generator loss function, and preliminary landslide surge data are generated; 3, mechanism verification: performing three-level verification on the initial landslide surge data generated in the step 2, and screening out data meeting requirements; if the data does not pass the verification, feeding back a verification result to the improved TimeGAN model to optimize generator parameters, and returning to the step 2 to regenerate the data; and if the data passes the verification, outputting final landslide surge big data. According to the invention, high-quality data conforming to physical rules is generated at low cost.

The application belongs to the technical field of wave propagation, and particularly discloses a numerical simulation method for propagation characteristics before and after high-power microwave atmospheric breakdown, which is based on a rotational body time-domain finite difference method to solve an electron fluid model improved based on an empirical formula, the electron fluid model including a Maxwell equation set, an electron density continuity equation, an electron fluid momentum conservation equation and an electron fluid energy equation, and the evolution processes of electromagnetic fields, electron densities and electron energies before and after high-power microwave atmospheric breakdown can be calculated by solving the improved electron fluid model. According to different atmospheric pressures and initial electron densities, the application adopts more accurate transport coefficients, so that the simulation precision can be greatly improved; and the application can also convert a three-dimensional electromagnetic propagation problem into a quasi-two-dimensional problem, so that the simulation time can be greatly shortened and the computer memory can be saved.

The invention relates to a method, a device, a medium and equipment for predicting annulus pressure and lining buckling of a flexible hose for oil and gas gathering and transportation. The method comprises the following steps: establishing a multi-component gas permeation continuity equation; constructing a gas phase concentration dynamic modulation model, correcting boundary conditions, and correcting the concentration of each gas component in the fluid in the pipe according to the liquid phase retention rate; constructing an annular gas mass balance equation; carrying out simultaneous solution on the multi-component gas permeation continuity equation and the annular gas mass balance equation to obtain gas concentration distribution of each node, and calculating annular gas pressure and total permeation pressure through an ideal gas state equation; and constructing a lining buckling displacement calculation model, inputting total permeation pressure into the lining buckling displacement calculation model, and iteratively calculating and outputting annular pressure and radial buckling displacement of the lining layer. According to the method, the modeling problem of the viscoplasticity and dynamic pressure boundary of the lining material is solved, and the buckling behavior is accurately predicted.

The application discloses a kind of vegetation riverway flow velocity and reynolds stress transverse distribution prediction method, belong to hydraulics and river dynamics technical field, including determining the average water depth two-dimensional longitudinal flow velocity transverse distribution control equation;With the upstream end boundary center position of non-submerged vegetation community as origin, riverway is divided into vegetation area and non-vegetation area along the direction perpendicular to water flow;Determine the average water depth longitudinal flow velocity transverse distribution analytical model of vegetation area and non-vegetation area;Propose the boundary condition of analytical model and solve, obtain each cross section flow velocity transverse distribution;Based on the predicted flow velocity transverse distribution, reynolds stress transverse distribution prediction model is constructed, and reynolds stress transverse distribution is predicted.The application uses the above method, derives the control equation of flow velocity transverse distribution in vegetation riverway from flow momentum equation and continuity equation, is solved according to boundary condition, realizes the prediction of each cross section flow velocity transverse distribution and reynolds stress transverse distribution.

The application discloses a kind of inland lake ecological water supplement amount prediction analysis method, comprising: obtaining the underwater topographic map of target lake, constructs the plane two-dimensional water flow movement basic equation of lake wind lake current and the plane two-dimensional water quality equation describing salt transport in lake conversion;Obtain the ecological water supplement flow and salt concentration of target lake, fit the plane two-dimensional water quality equation;To the finite difference discrete of continuity equation, momentum equation, the plane two-dimensional water flow movement basic equation is converted into linear algebra equation group;Linear algebra equation group is solved by ADI row-by-row method in time period, direction, and the water level, water depth and salt concentration of output prediction are exported;The water depth of each grid ecological water supplement is calculated, and then the comprehensive water depth of target lake ecological water supplement in future time is calculated, and the ecological water supplement amount of target lake prediction is obtained.