Zero velocities in a finer mesh resolution
Posted: 25 Mar 2020, 12:45
Hello,
I am trying to simulate ice flow around an obstacle and its influence on the ice surface elevation. For that I am using an "ice slab" domain with the obstacle in the center and using a tilted gravity vector instead of surface slope to drive ice flow. My problem is that for a mesh with a resolution high enough that allows the FreeSurface Solver to properly solve the region around the obstacle, I start getting zero velocities everywhere.
I have tried applying only a local mesh refinement and keeping the elements away from the obstacle relatively coarse, and it did not work either. I also tried using the refined mesh on a flat slab with no obstacle at all, and I run into the same problem, making me believe that the problem lies on the mesh resolution and not on the presence of the obstacle. Does anybody know what could be the problem?
I am attaching my sif file (that does not need input data for the flat slab), a mesh for which I get reasonable velocities, and a refined version of the mesh for which the same sif results in zero velocities everywhere.
Many thanks beforehand!
Martim
I am trying to simulate ice flow around an obstacle and its influence on the ice surface elevation. For that I am using an "ice slab" domain with the obstacle in the center and using a tilted gravity vector instead of surface slope to drive ice flow. My problem is that for a mesh with a resolution high enough that allows the FreeSurface Solver to properly solve the region around the obstacle, I start getting zero velocities everywhere.
I have tried applying only a local mesh refinement and keeping the elements away from the obstacle relatively coarse, and it did not work either. I also tried using the refined mesh on a flat slab with no obstacle at all, and I run into the same problem, making me believe that the problem lies on the mesh resolution and not on the presence of the obstacle. Does anybody know what could be the problem?
I am attaching my sif file (that does not need input data for the flat slab), a mesh for which I get reasonable velocities, and a refined version of the mesh for which the same sif results in zero velocities everywhere.
Many thanks beforehand!
Martim