for aerospace applications
Over the last 15 years R.Tech has developed the MISTRAL suite of aerothermodynamics codes (MISTRAL-CFD, MISTRAL-DSMC, MISTRAL-AUTOMESH and MISTRAL-THERMAL).
One of the important aspects for the MISTRAL-CFD code is the mesh quality. Without the outstanding grid qualityprovided by GridPro, it is difficult to obtain high quality results.
The simultaneous optimisation of volume and surface mesh results in excellent orthogonality near the walls. The wrapping techniques in the topology design avoids the boundary layer to propagate in the volume grid.
The clustering if often in the micrometer length scale to properly capture the thermal boundary layer, needed to get the heat fluxes right.
Speed is influenced as well by grid quality. On one side, bad quality cells cause a reduction in the maximum CFL number that can be used in the computations. On the other side, a higher cell count is needed to obtain good results.
Local grid refinement is used to concentrate cellsin regions with high gradients or high geometrical complexity and the reverse nesting is used to reduce the grid cells towards the far field regions.
The choice of GridPro by R.Tech has played a major role in the success story of the MISTRAL code.