THE SPECIFICS OF CALCULATING CONVECTIVE FLOWS IN AERODYNAMICS PROBLEMS USING MESHES WITH MOVING NODES
A. V. Sarazov VANT. Ser.: Mat. Mod. Fiz. Proc 2023. Вып.3. С. 5566.
The paper considers the 3D numerical simulation of aerodynamics (hydrodynamics) with moving boundaries. The approaches ensuring the numerical scheme conservativeness without diminution of accuracy are discussed. A formula is proposed for the velocity calculation of the moving faces of computational cells, which allows correctly calculating the face motion velocity vector in case of arbitrary distortions of the computational mesh. This formula is based on the idea of geometric conservativeness with the use of the normal reconstruction method with corrections in the direction. To demonstrate the performance of the implemented algorithms, direct unsteady problems are solved. The proposed scheme for calculating the moving face velocity demonstrates a good qualitative agreement of the calculated results with the real physics of the flow. Keywords: velocity of a face, the geometrical conservativeness condition, the NavierStokes equation system, NACA0012, AGARD 445.6, computational mesh distortions.
