MPI-CUDA Implementation of Implicit Euler Flow Solver in Grid-Free Framework
P.V.R.R. Bhogendra Rao, K. Ananadhanarayanan, Rajah Krishnamurthy, Debasis Chakraborty · Journal of Aerospace Sciences and Technologies · 2023
Graphics accelerators are increasingly used for general purpose high performance computing applications as they provide a low cost solution to high performance computing requirements. However, the existing application software needs to be restructured to suit to the accelerator paradigm. Explicit methods are inherently suitable for parallelization whereas implicit methods are not suitable as the nodes need to be processed in specific order. However, the nodes can be grouped into clusters such that nodes within the cluster are independent and can be processed concurrently. CUDA kernel can be launched separately for each cluster of nodes to process nodes in parallel leading to same computation results as sequential program. One such successful attempt has been made and the speed up obtained along with computation results is presented in this paper.