External Flow
The Mach 10 airfoil simulation below illustrates the use of CONVERGE™ for external flow calculations. The simulation was performed by using a coarse grid initially and then turning on embedded refinement. The activation of refinement was done automatically while the simulation was running (i.e., the simulation does not need to be stopped and restarted with a new grid).
Three types of embedding are used in this simulation:
- Grid Size Scaling - All cells are reduced in size by one scale (i.e., a factor of two).
- Fixed Grid Embedding - Four layers of cells are placed on the boundary at an embed scale of six.
- Adaptive Mesh Refinement - AMR is activated on the velocity field with an embed scale of five for the smallest allowed cells and the total number of cells is capped at 250,000.
The first frame of the movies below show the grid and pressure fields just before the three types of embedding are activated.
The movie below (AVI format - click to view) shows the pressure field for the Mach 10 airfoil simulation.
The movie below (AVI format - click to view) shows the pressure field and the gridlines for the Mach 10 airfoil simulation.
