4 results about "Pressure jump" patented technology

This invention discloses a method for evaluating the hydrodynamic response of flexible floating structures considering the equivalent effect of impermeable upper water. First, a three-dimensional hydroelastic-porous sidewall coupled model is established, equating the flexible structure to an elastic disk below the still water surface, with the outer impermeable boundary equivalent to a porous sidewall with minimal permeability. By dividing the external water area, the internal confined overlying water layer, and the lower water body and defining velocity potentials, semi-analytical solutions for the velocity potentials of each region are constructed using the separation of variables method and the eigenfunction expansion method. Combining fluid continuity conditions and porous sidewall matching conditions with pressure jump compensation, watershed matching is performed to solve for each modal coefficient, and then wave excitation force, deflection response, and free surface response are calculated. This invention, through layered modeling and near-impermeable boundary equivalence treatment, evaluates the water-blocking effect of the solid floating ring and the influence of the confined overlying water layer on the hydrodynamic response of the flexible structure, providing a theoretical basis for the structural optimization and wave-resistant design of floating photovoltaic systems under impermeable upper water conditions.

This invention relates to methods, components, and systems for determining characteristic properties of molecular interactions. The method includes providing a liquid sample comprising particles capable of being in equilibrium and non-equilibrium states. The particles comprise a marker in at least one of their equilibrium and non-equilibrium states. The method further includes subjecting the sample to a conditional transition including a temperature jump and / or a pressure jump, bringing the particles to a non-equilibrium state; reading out the marker as a function of time during at least a portion of the relaxation time of the particles; and determining the characteristic properties of the molecular interactions.

The present invention discloses a method for simulating the pressure and flow of a water-cooling system based on the flow resistance characteristics of a component. The method relates to the field of simulation of the pressure and flow of a water-cooling system, and uses a curved pipe and multiple porous pressure jump surfaces to replace the modeling of the water-cooling base plate and the radiator pipeline; the equivalent pipeline is connected to the main pipeline system as the overall pressure and flow simulation of the pipeline system; the formula and method for setting the simulation parameters of the porous pressure jump surface are calculated based on the flow resistance curve of the water-cooling base plate and the radiator provided by the supplier. Compared with the traditional water-cooling base plate modeling, the present invention greatly reduces the number of grids, significantly shortens the simulation cycle, and greatly improves the simulation efficiency; uses three-dimensional finite element simulation for the entire pipeline system outside the water-cooling base plate, significantly improving the calculation accuracy of the pressure loss of the main pipeline system, and also improving the calculation accuracy of the flow distribution of each module; after the simulation is completed, the pressure and flow at any point in the pipeline system are observed through a cloud map, providing a detailed and accurate reference basis for the design and selection of the water-cooling pipeline system.

The invention discloses a high-density-ratio bubble rising behavior numerical calculation method based on LSMPS. The method is specifically implemented according to the following steps that 1, a two-dimensional axisymmetric single bubble rising calculation model is established based on a meshless moving particle semi-implicit method; 2, calculating the temporary speed of the particles; 3, calculating the pressure of gas particles and interface node particles; step 4, calculating pressure jump of interface node particles; 5, calculating the pressure of the liquid particles; step 6, correcting the speed of the particles; 7, updating the positions of the particles and the interface node particles; and step 8, analog calculation and result export. According to the method, an axial symmetry model is adopted, rising behaviors of air bubbles in water and nitrogen bubbles in lead-bismuth alloy are numerically simulated, evolution of a bubble interface can be accurately captured, the total rising speed of the bubbles and the change rule of the speeds of the tops and the bottoms of the bubbles are analyzed, and the evolution process of the mass center height, the size, the surface area and the aspect ratio of the bubbles along with time is obtained.