199 results about "Fluid modeling" patented technology

The invention relates to the simulation method and apparatus used in plasma modeling. It includes a method to transform transient formulations of the phenomenological plasma model into a quasi-stochastic spatial formulation. Specifically, the invention aids in decreasing computational time for the modeling of plasma in a plasma processing system, particularly those involving two different time-based parameters. The invention is particularly described in connection with plasma simulations used for the optimization dual-frequency capacitively-coupled plasma etching systems.

The invention belongs to the field of environment protection, and in particular relates to an optimization design method of an anaerobic continuous flow agitator bath type biological hydrogen production reactor. The method comprises the following steps: researching reactor internal flow field characteristics of different types of stirring paddles under the conditions of different paddle-bath diameter ratios and different agitating speeds and influence on hydrogen production process, by using a numerical simulation software based on computational fluid mechanics technology; obtaining detailed flow field information, such as velocity field, turbulence energy and dissipation rate thereof, biogas integration rate and shearing rate distribution by adopting a two-phase flow model, and analyzing and comparing different flow field information obtained through simulation according to influence on hydrogen production process by the various flow field information, thereby determining an optimal stirring paddle style and agitating speed combination, and providing an effective method for the optimization design of the agitator bath reactor. The optimization design method of the anaerobic continuous flow agitator bath biological hydrogen production reactor is mature in technology, avoids the blindness of hydraulic design of the reactor using an empirical or semiempirical association method, and has the advantages of being visual in optimization cycle effect and short in optimization cycle, saving cost, and the like.

A spray injection analysis and nozzle configuration system is described having a user input unit that collects spray system input parameters and relays the collected parameters to a fluid performance matching unit and / or problem geometry unit for subsequent processing. The user inputs basic system parameters, including the desired spray fluid characteristics, to obtain suggested system configuration, including spray nozzle types and quantities. Accuracy of suggested spray nozzle type and configuration is increased via approximating the viscosity and / or surface tension parameters of the desired spray fluid with that of collected performance data. When a user already knows the desired spray nozzle type and associated system parameters, the user input unit routes this information to the problem geometry unit for creation of a problem geometry file, including calculation of the drop size distribution and spray velocity, and performance modeling via the fluid modeling unit.

The invention discloses a numerical prediction method for the size of bubbles in a gas-liquid multiphase pump, and the method comprises the following steps: 1, obtaining the final shapes of an impeller and a guide vane through the three-dimensional inverse problem design of the gas-liquid multiphase pump; 2, establishing a three-dimensional geometric model of the gas-liquid multiphase pump according to the step 1; 3, according to the geometric model in the step 2, carrying out full-flow-channel hexahedron structure grid division, and improving the grid quality by adopting different types of topological structures; 4, establishing a bubble size prediction model which comprises a basic control equation, a turbulence model and a bubble equation; 5, based on the bubble size prediction model inthe step 4, setting boundary conditions and solving parameters by adopting simulation calculation of computational fluid dynamics CFD, and carrying out numerical prediction on the bubble size and thegas-liquid two-phase flow field in the multiphase pump; and 6, carrying out post-processing analysis on the numerical calculation prediction in the step 5 to obtain a bubble size change rule in the impeller and the guide vane of the multiphase pump and gas-liquid two-phase flow field information.

A spray injection analysis and nozzle configuration system is described having a user input unit that collects spray system input parameters and relays the collected parameters to a fluid performance matching unit and / or problem geometry unit for subsequent processing. The user inputs basic system parameters, including the desired spray fluid characteristics, to obtain suggested system configuration, including spray nozzle types and quantities. Accuracy of suggested spray nozzle type and configuration is increased via approximating the viscosity and / or surface tension parameters of the desired spray fluid with that of collected performance data. When a user already knows the desired spray nozzle type and associated system parameters, the user input unit routes this information to the problem geometry unit for creation of a problem geometry file, including calculation of the drop size distribution and spray velocity, and performance modeling via the fluid modeling unit.

The invention discloses a novel non-Newtonian fluid micro-coating system, which comprises a non-Newtonian fluid material loading mechanism, a fluid modeling unit and an intelligent feedback coating control unit, wherein the non-Newtonian fluid material loading mechanism comprises a material storage pressure barrel internally provided with a pressure regulating valve, and an ejector pin valve typenozzle connected by means of a feeding pipeline; the pressure regulating valve controls the air pressure of the material storage barrel, and the fluid can be pressed into a feeding pipeline and then sprayed out by means of the nozzle; the fluid modeling system is responsible for performing process analysis on non-linear characteristics of the non-Newtonian fluid and dynamically modeling a micro-coating process; the intelligent feedback coating control system comprises an upper computer, a signal input module, a controller, a controlled object module, a detection unit and an execution module, and is responsible for performing feedback control on the flow velocity of pipeline fluid based on a non-Newtonian fluid model. The novel non-Newtonian fluid micro-coating system solves the problem that feedback control is not carried out according to fluid nonlinear features in the existing micro-coating process, and can be applied to various surface coating processes such as paint spraying and fluorescent powder glue coating.

The invention provides a method and a system for measuring and calculating the equivalent boundary distance of multilayer commingled producing well reservoir, and belongs to the field of oil and gas field development. The measuring and calculating method comprises the following steps that the measured pressure value which is changed alone the time of the measured bottom hole pressure of the multilayer commingled producing well is acquired; a theoretical pressure value which is changed alone the time of the theoretical bottom hole pressure of the multilayer commingled producing well is simulated according to a pre-configured seepage model, wherein the seepage model is pre-configured according to the difference of the distance of each reservoir boundary of the multilayer commingled producingwell; an error between the measured pressure value and the theoretical pressure value corresponding to the same time is calculated, and the seepage model is corrected according to the error; and according to the corrected seepage model, the equivalent boundary distance of the multilayer commingled producing well is measured. By adopting the technical scheme, the difference between the boundary distances of each reservoir of the multilayer commingled producing well is fully considered, the characteristics of each reservoir can be interpreted more accurately, the more accurate boundary equivalent distance is obtained, and important guiding significance is achieved for the implementation of single well dynamic reserves, subsequent well network encryption and the like.