Numerical aerodynamic simulation of transient flows around car based on parallel Newton–Krylov–Schwarz algorithm

Abstract

Computer simulations are used routinely in the automobile industry. The simulation algorithms and software are well developed for computations that are carried out on a small cluster of computers. To further reduce the design time and increase the fidelity of the computation, new algorithms and software are needed on larger computing systems with more processor cores. In this paper, we study a Newton–Krylov–Schwarz algorithm based 3D incompressible Navier–Stokes solver for solving unsteady, high Reynolds number flows around a car with realistic geometry and parameters. We also investigate the impact of the yaw angles and crosswind on the flow field. The numerical experiments show that the approach scales well with more than 8000 processor cores.

Keywords:

• Three-dimensional unsteady incompressible flows
• automotive aerodynamics
• full Navier–Stokes equations
• Newton–Krylov–Schwarz algorithm
• parallel computing

2010 Mathematics Subject Classifications:

• 76D05
• 65F08
• 65M55
• 65Y05

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

Rongliang Chen  http://orcid.org/0000-0002-5253-0412

Additional information

Funding

The research was supported by grants from the Shenzhen Fundamental Research and Discipline Layout project (JCYJ20160331193229720; JCYJ20170307165328836) and Shenzhen Technology Development Program (JSGG20170824154458183).