Titled dam break case in OpenFoam

harsha_kulkarni · October 13, 2021, 10:23

Hello friends
I want to simulate dam break case with tilted one..how to set fields for water in this case .here I am attaching the image
Please reply as soon as possible

Yann · October 13, 2021, 11:08

Hi,

You can run the case as it is after changing the orientation of gravity in the file constant/g to get the desired angle.

Cheers,
Yann

harsha_kulkarni · October 13, 2021, 11:13

But I am not able to set setfields in this case

Yann · October 13, 2021, 11:21

I mean you can keep the original dambreak case (not tilted) and change the orientation of the gravity vector. You will be able to run everything like in the original case, since the coordinate system does not change. You just have to rotate the whole case in paraview during post-processing for a better representation of the problem

EDIT: another way around is to start with the same case as the original damBreak case, run blockMesh and setFields and then use the transformPoints utility to rotate the mesh and fields before running interFoam. Something like this:

Code:

transformPoints -rotate-angle '((0 0 1) -50)' -rotateFields

Cheers,

Yann

harsha_kulkarni · October 25, 2021, 01:06

Quote:

Originally Posted by Yann

I mean you can keep the original dambreak case (not tilted) and change the orientation of the gravity vector. You will be able to run everything like in the original case, since the coordinate system does not change. You just have to rotate the whole case in paraview during post-processing for a better representation of the problem

EDIT: another way around is to start with the same case as the original damBreak case, run blockMesh and setFields and then use the transformPoints utility to rotate the mesh and fields before running interFoam. Something like this:

Code:

transformPoints -rotate-angle '((0 0 1) -50)' -rotateFields

Cheers,

Yann

We cannot set fields as per in diagram uploaded above

Yann · October 25, 2021, 03:24

I tried the solution I gave you on the damBreak case and it works fine.

Can you elaborate about what you are doing and what does not work?

harsha_kulkarni · October 25, 2021, 04:09

Quote:

Originally Posted by Yann

I tried the solution I gave you on the damBreak case and it works fine.

Can you elaborate about what you are doing and what does not work?

Sorry it's working fine

October 13, 2021, 11:21		#4
Yann Senior Member Yann Join Date: Apr 2012 Location: France Posts: 1,055 Rep Power: 26	I mean you can keep the original dambreak case (not tilted) and change the orientation of the gravity vector. You will be able to run everything like in the original case, since the coordinate system does not change. You just have to rotate the whole case in paraview during post-processing for a better representation of the problem EDIT: another way around is to start with the same case as the original damBreak case, run blockMesh and setFields and then use the transformPoints utility to rotate the mesh and fields before running interFoam. Something like this: Code: transformPoints -rotate-angle '((0 0 1) -50)' -rotateFields Cheers, Yann Last edited by Yann; October 13, 2021 at 13:09. Reason: Additional information

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October 13, 2021, 11:08		#2
Yann Senior Member Yann Join Date: Apr 2012 Location: France Posts: 1,055 Rep Power: 26	Hi, You can run the case as it is after changing the orientation of gravity in the file constant/g to get the desired angle. Cheers, Yann

October 13, 2021, 11:13		#3
harsha_kulkarni Senior Member harshawardhank Join Date: Mar 2014 Posts: 209 Rep Power: 13	But I am not able to set setfields in this case

October 25, 2021, 03:24		#6
Yann Senior Member Yann Join Date: Apr 2012 Location: France Posts: 1,055 Rep Power: 26	I tried the solution I gave you on the damBreak case and it works fine. Can you elaborate about what you are doing and what does not work?