[Technical] OpenFOAM v2112 SphereDrop revisition

wkholy · December 7, 2022, 06:36

I tried to revise the tutorial sphereDrop case by removing the farfield and leave the moving part only. It will act as a piston but drop along the wall.

However, when I remove the farfield zone, there would not be a pair of cycleAMI b.c., but a patch-type innerAMI only. The innerAMI is assigned a patch type referred to the movingConeTopo in extend version, but the mesh near the innerAMI patch is deformed badly when the sphere is dropping further, not translated with the sphere as expected.

I tried the moveingCone case yet it is not supported by OF v2112. May I ask if there is a solution for such setting?

Yann · December 7, 2022, 06:51

Hello,

I don't have a direct answer but there is a movingCone tutorial in v2112: $FOAM_TUTORIALS/incompressible/pimpleFoam/laminar/movingCone

Isn't it the one you are looking for?

Regards,
Yann

wkholy · December 7, 2022, 10:52

Hi, Yann, thanks for the response. The topology is unchanged in the tutorial of movingCone. What I would like to model is the cone attached on the top wall, which will change the topolgy whist the cone is moving.

In extend 1.6, it provides a case of movingConeTopo, which uses movingConeTopoFvMesh and layer addition/removal. I find this class is also included in of v2112, but fail to set up for the case.

Quote:

Originally Posted by Yann

Hello,

I don't have a direct answer but there is a movingCone tutorial in v2112: $FOAM_TUTORIALS/incompressible/pimpleFoam/laminar/movingCone

Isn't it the one you are looking for?

Regards,
Yann

wkholy · December 7, 2022, 11:15

Here is similar description with my problem.
https://scicomp.stackexchange.com/qu...of-variable-di

The solution seems yet unresolved.

Quote:

Originally Posted by Yann

Hello,

I don't have a direct answer but there is a movingCone tutorial in v2112: $FOAM_TUTORIALS/incompressible/pimpleFoam/laminar/movingCone

Isn't it the one you are looking for?

Regards,
Yann

2538sukham · August 29, 2023, 07:55

The pimpleFoam movingCone tutorial uses laplacian mesh motion. I am using the latest v2306 and by changing the dynamicMeshDict to address the movingConeTopoFvMesh inputs, the simulation runs. But then the velocity and pressure field is not satisfactory if compared to the one given in the tutorial. Are you looking only for the topoChange?

OpenFOAM v10 introduces a meshToMesh i think, which maps the solution to a predetermined mesh. I am also struggling with the velocity field after layer removal.

December 7, 2022, 06:36	OpenFOAM v2112 SphereDrop revisition	#1
wkholy New Member Kyle Join Date: Sep 2017 Posts: 10 Rep Power: 9	I tried to revise the tutorial sphereDrop case by removing the farfield and leave the moving part only. It will act as a piston but drop along the wall. However, when I remove the farfield zone, there would not be a pair of cycleAMI b.c., but a patch-type innerAMI only. The innerAMI is assigned a patch type referred to the movingConeTopo in extend version, but the mesh near the innerAMI patch is deformed badly when the sphere is dropping further, not translated with the sphere as expected. I tried the moveingCone case yet it is not supported by OF v2112. May I ask if there is a solution for such setting?

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December 7, 2022, 06:51		#2
Yann Senior Member Yann Join Date: Apr 2012 Location: France Posts: 1,238 Rep Power: 29	Hello, I don't have a direct answer but there is a movingCone tutorial in v2112: $FOAM_TUTORIALS/incompressible/pimpleFoam/laminar/movingCone Isn't it the one you are looking for? Regards, Yann

August 29, 2023, 07:55		#5
2538sukham Member Michael Sukham Join Date: Mar 2020 Location: India Posts: 85 Rep Power: 6	The pimpleFoam movingCone tutorial uses laplacian mesh motion. I am using the latest v2306 and by changing the dynamicMeshDict to address the movingConeTopoFvMesh inputs, the simulation runs. But then the velocity and pressure field is not satisfactory if compared to the one given in the tutorial. Are you looking only for the topoChange? OpenFOAM v10 introduces a meshToMesh i think, which maps the solution to a predetermined mesh. I am also struggling with the velocity field after layer removal.