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Linda September 2, 2011 04:39

Moving Mesh
 
Hi, Foamers


I would like to simulate the bed morphology. There is one moving boundary(sea bottom) in the computation domain. The movement (Ux, Uy, Uz) of that boundary is determined by Exner equation and changes with time.

1. Could movingConeMotion in icoDyMFoam in OF-1.5-dev solve the problem I mentioned before?

2. If so, in dynamicMeshDict, does twoDMotion mean that there are two direction movements of the boundary mesh points?How can I transfer the movement of the boundary to the solver? Which boundary condition should I use?

3. If no, could you help to suggest which way I should go?

Thanks
Linda

elvis September 2, 2011 05:14

Hello,

what about http://www.openfoamworkshop.org/6th_...liu_slides.pdf
Fruitful Modeling and Research Efforts by the Environmental Fluid Mechanics Group using OpenFOAM at University of Texas at San Antonio, TX , Xiaofeng Liu

I just searched for seabed openfoam at google scholar :p

Linda September 5, 2011 02:29

Hello,elvis:

Thanks. I read Dr. Liu's thesis and paper. However, I am wondering whether there is a tutorial as this case. Does it take longer time to do the tactics or not?

regards
Linda

elvis September 5, 2011 05:27

Dear Linda,

just saw that there is some work in these area
http://powerlab.fsb.hr/ped/kturbo/Op...006-jsc-16.pdf
http://gradworks.umi.com/3314965.pdf

Tutorials / tutorial cases are often provided by a Special Interest Group (SIG) that is working in that area
http://www.extend-project.de/user-groups/11/groups list some SIG that have founded

For "moving mesh" there are different stategies =>http://www.openfoamworkshop.org/6th_...ney_slides.pdf Adaptive Tetrahedral Re-Meshing for Deforming Domains,
K. Mooney, UMass Amherst

So you have to sort out which of them is the right one for your problem

kingle June 18, 2013 12:02

Quote:

Originally Posted by Linda (Post 322869)
Hello,elvis:

Thanks. I read Dr. Liu's thesis and paper. However, I am wondering whether there is a tutorial as this case. Does it take longer time to do the tactics or not?

regards
Linda

Hi, I think we are doing the similar work, I know some method of modeling morpholoy migration,such as Two-phase, FAM & automesh deformation , etc. But I think the classic method is moving mesh according Exner equation(sediment continuty), because the interface between the water and riverbed is sharp and not the mixture, so I don't think the FAM or two - phase method are appropriat for your project.I just know the theory about this method (I have read XiaofengLiu's paper) . However, I don't realize it. Because my knowledge on C++ is poor Now , i have been working on the sediment transport, especially on the bed load. If you have interest, we can communicate with each other, looking for your reply.


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