Immersing boundary flow field calculation method based on fluid/solid interface consistency
A calculation method and boundary flow technology, applied in calculation, special data processing applications, instruments, etc., can solve problems such as large error in velocity distribution near the boundary layer and extremely complicated interpolation process
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Embodiment 1
[0047] Example 1: as Figure 1-3 As shown, a method for calculating the immersion boundary flow field based on the consistent condition of the fluid-solid interface, the specific steps of the method are as follows:
[0048]A. Call the meshing module and use two sets of meshes: the flow field area and the solid boundary area; the flow field area is discretized by Cartesian grid under Euler description, and the solid boundary area is described by Lagrangian Volume curve mesh discretization;
[0049] B. Call the initial and boundary value setting module, set the boundary conditions of the flow field for the boundary of the flow field area, and set the initial value for the original variables of the flow field area;
[0050] C. Call the flow field velocity prediction module, and use the step-by-step projection method to solve the flow control equation of the incompressible viscous Newtonian fluid, and obtain the predicted value of the original variable in the flow field area;
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Embodiment 2
[0082] Example 2: as Figure 1-3 As shown, a method for calculating the immersion boundary flow field based on the consistent condition of the fluid-solid interface, the specific steps of the method are as follows:
[0083] The height of the square column in the solution area is H , the calculation area is , a rigid square column is immersed in the flow field, and the coordinate origin is located at the lower left vertex of the square column. The flow Reynolds number is defined as ,Time Step , the boundary of the square column is discrete with a spacing of 0.01 H .
[0084] S1: Meshing
[0085] The flow field area (including the fluid and rigid square column area) is divided by Cartesian grid under Euler description, the grid is a uniform quadrilateral grid, and the grid spacing is h =0.01 H , and output the cell coordinate information to the file fcor.txt, the solid boundary area is meshed with aptamer curves under the Lagrangian description, and the spacing is 0.0...
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