NinjaFOAM: Refine Mesh
After moveDynamicMesh
runs, refineMesh
is used to refine the near-surface cells in order to get a finer final mesh resolution near the ground. The syntax is:
refineMesh -dict system/refineMeshDict
The list of cells to refine is specified in system/refineMeshDict
by the following line:
set refineCells
The list of cells (refineCells
) can be generated by:
topoSet -dict system/topoSetDict
which generates a list of cells based on the settings in system/topoSetDict
. There are multiple ways to generate cell lists. These are the settings we use to define cells near the ground:
actions
(
// Select based on surface
{
name refineCells;
type cellSet;
action new;
source surfaceToCell;
sourceInfo
{
file "constant/triSurface/askervein.stl";
outsidePoints ((0 0 300)); // definition of outside
includeCut false; // cells cut by surface
includeInside false; // cells not on outside of surf
includeOutside false; // cells on outside of surf
nearDistance 50.0; // cells with centre near surf
// (set to -1 if not used)
curvature -100; // cells within nearDistance
// and near surf curvature
// (set to -100 if not used)
}
}
);
See system/topoSetDict
and here for other methods:https://openfoamwiki.net/index.php/TopoSet