Benchmarking and scaling studies of a pseudospectral code Tarang for turbulence simulations

TL;DR

This paper presents validation and benchmarking of the Tarang pseudospectral code for turbulence simulations, demonstrating its scalability on large HPC systems across various grid sizes.

Contribution

It provides the first comprehensive benchmarking and scaling analysis of Tarang for high-resolution turbulence simulations on supercomputers.

Findings

Tarang achieves good weak and strong scaling on large HPC systems.

Validated accuracy of Tarang for fluid, MHD, and convection turbulence simulations.

Successfully simulated flows on grids up to 4096^3 points.

Abstract

Tarang is a general-purpose pseudospectral parallel code for simulating flows involving fluids, magnetohydrodynamics, and Rayleigh-B\'{e}nard convection in turbulence and instability regimes. In this paper we present code validation and benchmarking results of Tarang. We performed our simulations on $1024^3$, $2048^3$, and $4096^3$ grids using the {\em HPC system} of IIT Kanpur and {\em Shaheen} of KAUST. We observe good "weak" and "strong" scaling for Tarang on these systems.