Gerris Flow Solver: Implementation and Application
NAVAL RESEARCH LAB STENNIS DETACHMENT STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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This report describes the implementation of the Gerris Flow Solver GFS at NRL. GFS is an open-source software library for computational fluid dynamics that includes modules for the solution of the Navier-Stokes equations, and both linear and non-linear shallow water equations. GFS features dynamic adaptive mesh refinement AMR based on a semi-structured quadtreeoctree mesh. A visualization tool GfsView is included that enables viewing model output on the adaptive mesh. We have applied GFS to a number of problems in estuary flow. The CFD model has been used for direct numerical simulation of 2D-vertical tidal flow in a macrotidal river, and interaction of a fluid mud layer with the flow. The 2D shallow water models linear and non-linear have been used to simulate tidal flow in Mississippi Sound and the Gulf of MaineBay of Fundy. We have implemented a wave-current bottom boundary layer model BBLM into GFS as a plug-in.
- Computer Programming and Software