Caedium v5 Sneak Peek: Polyhedral Meshes Improve CFD
The next release of the Caedium CFD software system will provide an option to automatically convert a RANS Flow volume mesh to a polyhedral mesh - also known as a dual mesh. Solving the RANS equations on the dual mesh compared to the equivalent tetrahedral mesh typically leads to higher accuracy results with both faster and more reliable convergence.
Converting a tetrahedral mesh to a dual mesh will:
- Reduce the number of volume elements
- Increase the size of each volume element
- Increase the number of faces (cell neighbors) per volume element
The increased element size and increased number of neighbors per element proves to be a significant benefit. If you compare the results from a tetrahedral mesh to the results from a dual mesh with the same number of cells, then the dual mesh will in general:
- Converge faster with fewer iterations
- Converge more reliably to lower residual values
- Produce results with higher accuracy
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