| Summary: | The objective of the ComPASS project is to develop a parallel multiphase Darcy flow
simulator adapted to general unstructured polyhedral meshes (in a general sense with
possibly non planar faces) and to the parallelization of advanced finite volume
discretizations with various choices of the degrees of freedom such as cell centres,
vertices, or face centres. The main targeted applications are the simulation of CO2 geological storage, nuclear waste repository and
reservoir simulations.
The CEMRACS 2012 summer school devoted to high performance computing has been an ideal
framework to start this collaborative project. This paper describes what has been achieved
during the four weeks of the CEMRACS project which has been focusing on the implementation
of basic features of the code such as the distributed unstructured polyhedral mesh, the
synchronization of the degrees of freedom, and the connection to scientific libraries
including the partitioner METIS, the visualization tool PARAVIEW, and the parallel linear
solver library PETSc. The parallel efficiency of this first version of the ComPASS code
has been validated on a toy parabolic problem using the Vertex Approximate Gradient finite
volume spatial discretization with both cell and vertex degrees of freedom, combined with
an Euler implicit time integration.
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