interDyMFoam with tetraeder mesh

idrama · December 24, 2009, 09:04

Hey folks!

I have just started to learn interDyMFoam. I generated in Salome a similar mesh like in the damBreakWithObstacle tutorial and exported it to OpenFOAM directory. After I have import the mesh and adjusted the boundary condition I let run the same simulation. However, the simulation aborted immediately with the error message:

Starting time loop

Courant Number mean: 0 max: 0
deltaT = 0.00117647
Time = 0.00117647

Selected 1648 cells for refinement out of 15335.
hexRef8 : Dumping cell as obj to "/home/idrama/OpenFOAM/idrama/run/damBreakWithObstacle/cell_62.obj"

cell 62 of level 0 does not seem to have 8 points of equal or lower level
cellPoints:4(2977 2229 2238 1775)
pointLevels:4{0}

Can I use tetraeder as volumes insteaed cubes?

Cheers,

Claus

deepsterblue · December 25, 2009, 14:28

Nope. The stuff in openfoam at the moment currently supports only hexahedra.

idrama · December 25, 2009, 15:28

There are any intentions of modification of OpenFOAM such that tetrahedron become possible?

olwi · December 29, 2009, 06:32

Hi Claus,

You can indeed use tetrahedrons (or in fact any type of polyhedra) with OpenFOAM, but the dynamic mesh class used in icoDyMFoam does only work for hexahedrons. The refining is made by splitting a hexahedron into eight.

All other functionality in OpenFOAM is for general polyhedra.

/Ola

December 24, 2009, 09:04	interDyMFoam with tetraeder mesh	#1
idrama Senior Member Claus Meister Join Date: Aug 2009 Location: Wiesbaden, Germany Posts: 241 Rep Power: 17	Hey folks! I have just started to learn interDyMFoam. I generated in Salome a similar mesh like in the damBreakWithObstacle tutorial and exported it to OpenFOAM directory. After I have import the mesh and adjusted the boundary condition I let run the same simulation. However, the simulation aborted immediately with the error message: Starting time loop Courant Number mean: 0 max: 0 deltaT = 0.00117647 Time = 0.00117647 Selected 1648 cells for refinement out of 15335. hexRef8 : Dumping cell as obj to "/home/idrama/OpenFOAM/idrama/run/damBreakWithObstacle/cell_62.obj" cell 62 of level 0 does not seem to have 8 points of equal or lower level cellPoints:4(2977 2229 2238 1775) pointLevels:4{0} Can I use tetraeder as volumes insteaed cubes? Cheers, Claus

December 25, 2009, 14:28		#2
deepsterblue Senior Member Sandeep Menon Join Date: Mar 2009 Location: Amherst, MA Posts: 403 Rep Power: 25	Nope. The stuff in openfoam at the moment currently supports only hexahedra. __________________ Sandeep Menon University of Massachusetts Amherst https://github.com/smenon

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December 25, 2009, 15:28		#3
idrama Senior Member Claus Meister Join Date: Aug 2009 Location: Wiesbaden, Germany Posts: 241 Rep Power: 17	There are any intentions of modification of OpenFOAM such that tetrahedron become possible?

December 29, 2009, 06:32		#4
olwi Member Ola Widlund Join Date: Mar 2009 Location: Sweden Posts: 87 Rep Power: 17	Hi Claus, You can indeed use tetrahedrons (or in fact any type of polyhedra) with OpenFOAM, but the dynamic mesh class used in icoDyMFoam does only work for hexahedrons. The refining is made by splitting a hexahedron into eight. All other functionality in OpenFOAM is for general polyhedra. /Ola