Solution Interpolation Model Reference
The Solution Interpolation model allows you to choose the interpolation method that is used for mapping the solution data when remeshing occurs.
| Model Name | Solution Interpolation | ||
| Provided By | |||
| Example Node Path | |||
| Requires | Physics Models:
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| Properties | Per Part Mapping, Interpolation Method, Conservative Correction | ||
| Theory | Solution Data Interpolation | ||
Solution Interpolation Model Properties
- Per Part Mapping
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Determines whether Simcenter STAR-CCM+ interpolates the data on a region basis or on a part basis. When activated, the solution is interpolated from each part on the original mesh to each part on the new mesh. Per part mapping improves solution interpolation near part contacts.
- Interpolation Method
- Determines the method that is used to
interpolate the solution from an existing volume mesh to a newly generated
volume mesh. These options are the same as the options provided for Mesh
Replacement
- Nearest neighbor—maps the solution data from one mesh to another by comparing the cell centroids in each mesh. That is, the new cell gets the solution data from an old cell whose cell centroid is closest to its own. This option is quick, but does not provide a smooth interpolation of results.
- Higher-order stencil—maps the solution data from one mesh to another by using a stencil of cells and faces on the original mesh. A smooth interpolation is achieved by using a distance-weighted, least-square interpolation. This option is recommended for transient analyses.
- Legacy Method
- For interpolation, Simcenter STAR-CCM+ matches each cell in the new mesh to
corresponding cells in the old mesh.
From Simcenter STAR-CCM+ 2019.3, for a target cell in the new mesh, the matching algorithm finds the cell in the old mesh that contains the centroid of the target cell, rather than the cell with the closest centroid. When you activate the Legacy Method property, Simcenter STAR-CCM+ falls back to the legacy closest-centroid search method.
For shell regions, the Legacy Method is the only compatible option and is activated automatically. In all other cases, you are recommended to leave the Legacy Method deactivated.
- Conservative Correction
- Currently, conservative interpolation is
supported for flow and energy models (segregated and coupled) as well as
some turbulence models. This option is inactive (greyed-out) if any
unsupported models are selected in the continuum.
When set to Enable, Simcenter STAR-CCM+ enforces the conservation of mass, momentum and energy during the interpolation process.
When you activate Per Part Mapping, these quantities are conserved for each part; otherwise conservation is enforced on a region basis.