> I am curious as to what kind of multiphysics problems you have solved > with Libmesh before and what kind of approach you took for those. I > gather you used a single mesh for both the physics but where you able > to preserve the accuracy of the coupled solution in space and time ? > And did you use Operator-splitting with iterations over the coupled > physics ?
Actually most recently I have been working the conjugate heat transfer problem. The "external" application is hypersonic flight and the "internal" application is solid-body conduction. This uses two meshes, one for the fluid flow and one for the heat transfer. An operator-split approach is natural in this problem because of the disparate time scales. The external flow characteristic times are ~microseconds while the heat transfer problem is ~seconds. The approach couples the problem at the boundary. The temperature is interpolated from the heat transfer part to provide an isothermal boundary condition for the flow. The heat transfer is then interpolated from the fluid part and transformed into a heat transfer coefficient boundary condition for the heat transfer problem. It works well because the heat transfer coefficient is approximately constant for a small range in wall temperature, so the time coupling here is especially loose. -Ben ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
