Ghost cells in a linear system solve #3367
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WeiqunZhang
ZiyangHuang
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I am using the "MLABecLaplacian" to solve my problem that has either periodic or homogeneous Neumann BC. Does the "multifab" that stores the solution need any ghost cells? Thanks! |
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Answered by
WeiqunZhang
Jun 14, 2023
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No, the solution MultiFab is not required to have ghost cells. If it does not have exactly one ghost cell, the solver will create a temporary internally. So for performance, it might be slightly better to have one ghost cell. |
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No, the solution MultiFab is not required to have ghost cells. If it does not have exactly one ghost cell, the solver will create a temporary internally. So for performance, it might be slightly better to have one ghost cell.