Creation of parallel algorithms for the solution of problems of gas dynamics on multi-core computers and GPU
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RYBAKIN, Boris, BOGATENCOV, Peter P., SECRIERU, Grigore, ILUHA, Nicolai P.. Creation of parallel algorithms for the solution of problems of gas dynamics on multi-core computers and GPU. In: AIP Conference Proceedings, Ed. 5, 24-29 iunie 2013, Albena. College Park, Maryland: American Institute of Physics Inc., 2013, Vol.1561, pp. 164-171. ISBN 978-073541189-0. ISSN 15517616. DOI: https://doi.org/10.1063/1.4827225
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AIP Conference Proceedings
Vol.1561, 2013
Conferința "5th International Conference for Promoting the Application of Mathematics in Technical and Natural Sciences"
5, Albena, Bulgaria, 24-29 iunie 2013

Creation of parallel algorithms for the solution of problems of gas dynamics on multi-core computers and GPU

DOI:https://doi.org/10.1063/1.4827225

Pag. 164-171

Rybakin Boris1, Bogatencov Peter P.2, Secrieru Grigore3, Iluha Nicolai P.2
 
1 Lomonosov Moscow State University,
2 RENAM Association,
3 Institute of Mathematics and Computer Science ASM
 
 
Disponibil în IBN: 7 martie 2024


Rezumat

The paper deals with a parallel algorithm for calculations on multiprocessor computers and GPU accelerators. The calculations of shock waves interaction with low-density bubble results and the problem of the gas flow with the forces of gravity are presented. This algorithm combines a possibility to capture a high resolution of shock waves, the second-order accuracy for TVD schemes, and a possibility to observe a low-level diffusion of the advection scheme. Many complex problems of continuum mechanics are numerically solved on structured or unstructured grids. To improve the accuracy of the calculations is necessary to choose a sufficiently small grid (with a small cell size). This leads to the drawback of a substantial increase of computation time. Therefore, for the calculations of complex problems it is reasonable to use the method of Adaptive Mesh Refinement. That is, the grid refinement is performed only in the areas of interest of the structure, where, e.g., the shock waves are generated, or a complex geometry or other such features exist. Thus, the computing time is greatly reduced. In addition, the execution of the application on the resulting sequence of nested, decreasing nets can be parallelized. Proposed algorithm is based on the AMR method. Utilization of AMR method can significantly improve the resolution of the difference grid in areas of high interest, and from other side to accelerate the processes of the multi-dimensional problems calculating. Parallel algorithms of the analyzed difference models realized for the purpose of calculations on graphic processors using the CUDA technology [1]. 

Cuvinte-cheie
supercomputers, hydrodynamics, Computer Systems Programming