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February 22, 2011, 21:25
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Level set and the boundary condation
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New Member
AlvinXu
Join Date: Nov 2009
Posts: 15
Rep Power: 17  |
I currently try to implement a level-set equation into OpenFOAM for a simulation of air-water effect on cable of cable stayed bridge,
first I solve the transport equation and use the zeroGradient boundary condition solve ( fvm::ddt(G) +fvm::div(phi,G) ); but the magnitude of fvc::grad(G) is not equal to one in the boundary cells, how can I deal with problem? second , I solve the reinitialization equation whit steady state method and the Convergence condition is the average of mag(one-fvc::grad(G))=0,but as above, the boundary cell's gradient is not equal to 1, how can I deal with this problem Alvin Last edited by alvin11; February 23, 2011 at 20:28. |
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February 24, 2011, 05:53
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#3 |
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Member
Duong A. Hoang
Join Date: Apr 2009
Location: Delft, Netherlands
Posts: 93
Rep Power: 17  |
Hi Nima,
I am using interFOAM to simulate capillary driven flow also. I found that the VOF method in OF produce quite bad curvature calculation. I am thinking of improving that by using couple level set and VOF or smoothed function. Could you please explain the term "redistance function to smooth interface" for me? Could you please also suggest any literatures for this "redistance function"? Regards, Duong |
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February 24, 2011, 06:55
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Senior Member
Nima Samkhaniani
Join Date: Sep 2009
Location: Tehran, Iran
Posts: 1,267
Blog Entries: 1
Rep Power: 25 |
first of all!, if ur geometry is 3D
use interDyMFoam and use dynamic refinement may be it cures ur problem. im also interested in coupling VOF and level set method in openFoam, i read some articles about but im some how busy to implement it my self now, so it would be great we both share our knowledge about it ,give me ur email i will send u those articles 
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February 24, 2011, 17:16
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#5 |
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New Member
Join Date: Jul 2009
Posts: 3
Rep Power: 17 |
Alvin,
I'm guessing that the outflow conditions on your redistancing method that are being applied at the boundaries are not consistent with the requirement that mag(Grad(G)) = 1.0 |
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February 28, 2011, 04:37
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#6 |
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Senior Member
Matthias Voß
Join Date: Mar 2009
Location: Berlin, Germany
Posts: 449
Rep Power: 20 |
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February 28, 2011, 09:29
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#7 |
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Member
Javier Basurco
Join Date: Jan 2010
Location: Rio de Janeiro, Brazil
Posts: 32
Rep Power: 16 |
Dear Newbie,
May be you can send this article. I don't permission to access this server. Thanks in advance I look a forward to hearing from you Respectfully Ingenierias2003 |
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February 28, 2011, 10:16
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#8 |
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Senior Member
Kathrin Kissling
Join Date: Mar 2009
Location: Besigheim, Germany
Posts: 134
Rep Power: 17 |
Hey,
pretty similar slides can be found here http://web.student.chalmers.se/group...SlidesOFW5.pdf Best Kathrin |
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October 15, 2012, 20:31
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#9 |
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Senior Member
Alberto Passalacqua
Join Date: Mar 2009
Location: Ames, Iowa, United States
Posts: 1,912
Rep Power: 36 |
Is the code with CLSVOF (or similar approach coupling VOF and level-set) available?
__________________
Alberto Passalacqua GeekoCFD - A free distribution based on openSUSE 64 bit with CFD tools, including OpenFOAM. Available as in both physical and virtual formats (current status: http://albertopassalacqua.com/?p=1541) OpenQBMM - An open-source implementation of quadrature-based moment methods. To obtain more accurate answers, please specify the version of OpenFOAM you are using. 
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| level set |
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Linear Mode
