Is it possible to use unstructured Cartesian grid for OpenFOAM

eric-meng · April 9, 2018, 04:05

Hi I am beginner for CFD and OpenFOAM

I am very curious the possibility of using unstructured Cartesian meshes (as shown in the picture) in OpenFOAM

what software should I use to generate this type mesh???

RobertHB · April 9, 2018, 08:23

Hello Eric,
you can create unstructured grids using gmesh. A structure as shown in your post can be created by OpenFOAM if you snappyHexMesh and a suitable stl. file to generate the mesh.

voronok95 · May 9, 2018, 17:54

Hello!

I'm trying to solve the problem of thermal conductivity using, while using the snappyHexMesh. When creating a grid, 5/10 folders are created, in which the grid is stored. If I run the LaplacianFoam utility (on a uniform grid), there are also folders 5/10/15, which store the solution at different times. Accordingly, when I use the LaplacianFoam utility with snappyHexMesh, a conflict arises. How can I get rid of it?

RobertHB · May 10, 2018, 03:05

Quote:

Originally Posted by voronok95

Hello!

I'm trying to solve the problem of thermal conductivity using, while using the snappyHexMesh. When creating a grid, 5/10 folders are created, in which the grid is stored. If I run the LaplacianFoam utility (on a uniform grid), there are also folders 5/10/15, which store the solution at different times. Accordingly, when I use the LaplacianFoam utility with snappyHexMesh, a conflict arises. How can I get rid of it?

You need to copy the polyMesh folder from the last snappHexMesh timestep into your constant/ folder. You can then delete the sHM timesteps and proceed with your simulation.

April 9, 2018, 04:05	Is it possible to use unstructured Cartesian grid for OpenFOAM	#1
eric-meng New Member Join Date: Apr 2018 Posts: 14 Rep Power: 8	Hi I am beginner for CFD and OpenFOAM I am very curious the possibility of using unstructured Cartesian meshes (as shown in the picture) in OpenFOAM what software should I use to generate this type mesh???

May 9, 2018, 17:54	snappyHexMesh and laplacianFoam	#3
voronok95 New Member Sveta Join Date: May 2018 Posts: 2 Rep Power: 0	Hello! I'm trying to solve the problem of thermal conductivity using, while using the snappyHexMesh. When creating a grid, 5/10 folders are created, in which the grid is stored. If I run the LaplacianFoam utility (on a uniform grid), there are also folders 5/10/15, which store the solution at different times. Accordingly, when I use the LaplacianFoam utility with snappyHexMesh, a conflict arises. How can I get rid of it?

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April 9, 2018, 08:23		#2
RobertHB Senior Member Robert Join Date: May 2015 Location: Bremen, GER Posts: 292 Rep Power: 11	Hello Eric, you can create unstructured grids using gmesh. A structure as shown in your post can be created by OpenFOAM if you snappyHexMesh and a suitable stl. file to generate the mesh.