FlexPDE 7 allows the definition of mesh-moving equations*, and applies an Arbitrary Lagrange/Eulerian (ALE) formulation. This allows several optional behaviors:
- By locking the mesh to the fluid velocity, you can create a fully Lagrangian model.
- Or, you can define a relaxive mesh within moving boundaries to maintain mesh integrity.
- Or, by omitting the mesh moving equations, you can perform a fully Eulerian computation.
In any case, FlexPDE automatically corrects the PDE system to represent the motion of the mesh.
The problem shown
here computes the motion of a gas in a compressor
(All animations are FlexPDE native graphical output, assembled into a movie by AnimationShop)
*Note: FlexPDE 7 does not support slip surfaces.