Parallel implementation for a mhd solver with equilibrium chemistry
Starr, Spencer C. Hoffmann, Klaus A.
Starr, Spencer C.
Hoffmann, Klaus A.
Authors
Other Names
Location
Time Period
Advisors
Original Date
Digitization Date
Issue Date
2020-06-08
Type
Conference paper
Genre
Keywords
Application programming interfaces (API),Aviation,Hypersonic flow,Runge Kutta methods
Subjects (LCSH)
Citation
Starr, Spencer C.; Hoffmann, Klaus A. 2020. Parallel implementation for a mhd solver with equilibrium chemistry. AIAA Aviation 2020 Forum, vol. 1:pt. F
Abstract
A parallel implementation for a hypersonic MHD solver was developed. The original serial code utilizes a 4th-order modified Runge-Kutta scheme with TVD to solve the MHD equations for hypersonic flow regimes. To extend the capabilities of the serial solver, both a purely MPI parallel model and a hybrid MPI/OpenMP model were implemented and tested. The strong and weak scaling of the MPI-only implementation were subsequently investigated. Significant performance increases were observed, as is expected in a parallel implementation. However, the solver exhibited poor parallel efficiency for larger numbers of processes, which could be attributed to a communication intensive numerical scheme. The maximum speedup obtained was 128 on 256 cores. The addition of OpenMP did little to improve the performance of the MPI implementation except for cases with low numbers of cores. To extend the investigation of scalability to larger problems, the parallel program was then be used to simulate a double compression corner problem at Mach 9. For this larger problem, near ideal weak scaling was observed for up to thousands of cores.
Table of Contents
Description
Click on the DOI link to access the article (may not be free).
Publisher
American Institute of Aeronautics and Astronautics Inc
Journal
Book Title
Series
AIAA Aviation 2020 Forum;v.1:pt.F