nsCouette – A high-performance code for direct numerical simulations of turbulent Taylor–Couette flow

Abstract

We present nsCouette, a highly scalable software tool to solve the Navier–Stokes equations for incompressible fluid flow between differentially heated and independently rotating, concentric cylinders. It is based on a pseudospectral spatial discretization and dynamic time-stepping. It is implemented in modern Fortran with a hybrid MPI-OpenMP parallelization scheme and thus designed to compute turbulent flows at high Reynolds and Rayleigh numbers. An additional GPU implementation (C-CUDA) for intermediate problem sizes and a version for pipe flow (nsPipe) are also provided.

Keywords

• Wall-bounded turbulence
• Rotating shear-flow
• Thermal convection
• Direct numerical simulation (DNS)
• Hybrid parallelization
• GPU