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Fluid thermal motion simulation system based on SPH algorithm

A simulation system and thermal motion technology, applied in computing, special data processing applications, instruments, etc., can solve problems such as inaccurate results, fluid thermal motion simulation, etc., to solve fluid thermal motion turbulence, improve calculation stability and calculation The effect of precision

Inactive Publication Date: 2014-11-12
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0005] The purpose of the present invention is to solve the inaccurate results caused by the deformation of the grid when the existing gridded CFD simulation system solves some highly nonlinear problems and the inability of the existing gridless CFD simulation system to simulate the thermal motion of the fluid problem, providing a fluid thermal motion simulation system based on the SPH algorithm

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  • Fluid thermal motion simulation system based on SPH algorithm
  • Fluid thermal motion simulation system based on SPH algorithm
  • Fluid thermal motion simulation system based on SPH algorithm

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Embodiment Construction

[0040] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the embodiments and the accompanying drawings.

[0041]The implementation process of the fluid thermal motion simulation system based on the SPH algorithm of the present invention will be described below by taking the natural convection simulation of a closed square cavity as an example.

[0042] according to figure 1 The flow shown realizes the simulation of this embodiment, and the specific implementation steps are as follows:

[0043] 1. The pre-processing module includes:

[0044] 1) SPH algorithm setting

[0045] Calculation method: GPU parallel.

[0046] The format of the SPH algorithm is set as follows, time integral format: leapfrog method; kernel function format: quintic spline kernel function; viscous settlement format: laminar flow viscosity.

[0047] Corr...

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Abstract

The invention relates to a fluid thermal motion simulation system based on the SPH algorithm and belongs to the field of thermodynamics simulation and visual flowing. The method comprises the steps of conducting modeling on fluid according to calculation examples and calculation requirements, solving a fluid control equation and a modified equation based on the SPH algorithm to achieve analogue simulation of fluid Lagrange thermal motion, and finally showing the thermal motion process of fluid visually in the form of graphs and animations by means of the visual processing technology. Compared with an existing meshing CFD simulation system, the fluid thermal motion simulation system has the advantage that a more reasonable simulation result can be obtained when the system is used for simulating certain advanced non-linear problems such as the jet flow problem, the ocean motion problem, the dam break problem and the dynamic boundary problem. Compared with an existing mesh-free CFD simulation system, the fluid thermal motion simulation system has the advantages that calculation stability and calculation accuracy are improved, and the gap of fluid thermal motion simulation and turbulent flow simulation is filled.

Description

technical field [0001] The invention relates to a fluid thermal motion simulation system based on a smooth particle hydrodynamic algorithm (SPH), belonging to the field of thermodynamic simulation and visual flow. Background technique [0002] Thermal motion simulation of fluids has a wide range of applications in practical engineering, such as building insulation, nuclear reactor safety design, cooling of microelectronic devices, etc. [0003] The smooth particle hydrodynamics method is a particle-based meshless numerical simulation method. The method is applied to solve various fluid mechanics and solid mechanics problems, including fluid-structure interaction problems, solidification problems, jet problems, multiphase flow problems , heat conduction problems, etc. As the most classic meshless method, the smooth particle dynamics method has been continuously improved, a variety of correction techniques have been proposed and applied, and the corresponding pre-processing an...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 雷娟棉杨浩黄灿王锁柱
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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