UCBCFD / MLegS

Mapped Legendre Spectral Method Code for Unbounded Vortical Flow Simulations

MLegS: Parallelized Mapped Legendre Spectral Method Code

MLegS (Mapped Legendre Spectral Method Code) is a code package based on a parallelized spectral method for vortical (swirling) flow simulations in an unbounded domain.

Based on the numerical algorithm proposed by T. Matsushima and P. S. Marcus (1997)¹, MLegS incorporates scalable multiprocessing interfaces for high-performance computing. MLegS is written in Modern Fortran; the code package is open-source under a BSD license.

Prior to its open-source release, MLegS was successfully used in several vortex dynamics studies in the context of wake vortices in the atmosphere. One example is S. Lee and P. S. Marcus (2023)², where one can find the detailed mathematical formulation of the mapped Legendre (pseudo-)spectral method.

Links

• Code repository: https://github.com/ucbcfd/MLegS
• Documentation: https://ucbcfd.github.io/MLegS

Contributors

• Jinge Wang
• Sangjoon Lee
• UC Berkeley CFD Lab

Footnotes

1. J. Comput. Phys., vol. 137, no. 2, 1997, pp. 321-345 ↩

2. J. Fluid Mech., vol. 967, 2023, A2 ↩