The Elliptical Parcel-In-Cell (EPIC) method

The EPIC code is an open-source framework written in Fortran 2018 to simulate general two and three-dimensional flows. The primary focus of the current implementation is on buoyancy-driven turbulent flows for cloud convection. It uses elliptical Lagrangian parcels that deform based on the local strain field. The gridded velocity is obtained by efficient inversion of the interpolated parcel vorticity on the Eulerian grid.

Detailed information about the numerics is found in

• M. Frey, D. Dritschel, S. Böing, EPIC: The Elliptical Parcel-In-Cell method , J. of Comp. Phys.: X 14 (2022) 100109.
• M. Frey, D. Dritschel, S. Böing, The 3D Elliptical Parcel-In-Cell (EPIC) method , J. of Comp. Phys.: X, 17 (2023), 100136.

The current teams consists of

• Matthias Frey, University of St Andrews
• David Dritschel, University of St Andrews
• Steven J. Böing, University of Leeds
• Rui Apostolo, Edinburgh Parallel Computing Centre (EPCC)