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How to set the two parameters of solver binterFoamb

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Old   May 15, 2005, 02:17
Default Hi,everyone. 1.There are two
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Luckyluke
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Hi,everyone.
1.There are two parameters needed by 'interFoam': one is 'cGamma', the other is 'pesi' used in 'div(phi,gamma) Gauss Gamma201 0.2'. What behavior is controled by the two parameters? Is the solver 'interFoam' diffusive? How many meshes will be crossed by the interface after long time computation?
2.Is the CICSAM scheme more diffusive than the current schoem of OpenFOAM?
3.I want to mention the current interFoam algorithm in my future article, where can I get the accurate introduction to it?
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Old   May 15, 2005, 02:24
Default There is no perfect reference
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There is no perfect reference for this because the algorithm has never been published. The closest I've got (the description is a couple of years old and we have moved on a bit since) is Henrik Rusche's PhD Thesis from Imperial College:

@PhdThesis{Rusche:PhD,
author = {Rusche, H.},
title = {Computational fluid dynamics of dispersed two-phase
flows at high phase fractions},
school = {Imperial College, University of London},
year = 2003
}

Enjoy,

Hrv
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Old   May 15, 2005, 04:01
Default My interface-capturing algorit
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My interface-capturing algorithm in interFoam has already been disussed in detail on this site. You can use the search facility to fine the threads.
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Old   May 31, 2005, 21:46
Default Unfortunately, I cannot find R
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Unfortunately, I cannot find Rusche's thesis from the web site ProQuest Digital Dissertations.
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Old   June 3, 2005, 06:13
Default Does it actually matter how th
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Does it actually matter how the phases are defined?

e.g.

phase1 = always the denser phase
phase2 = always the lighter phase

or does it matter which phase is disperse?

e.g.

bubble problems:
phase1 = gas
phase2 = liquid (water) or vice versa

spray probelms:

phase1 = liquid (water, fuel)
phase2 = gas or vice versa
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Old   June 3, 2005, 06:16
Default No it doesn't matter which pha
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No it doesn't matter which phase is which, in fact phase-inversion can be handled without problem.
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Old   June 3, 2005, 06:20
Default So my assumption that the comp
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So my assumption that the compression works more on phase1 is wrong than?
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Old   June 3, 2005, 06:33
Default The compression is symmetric s
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The compression is symmetric so it doesn't matter if we solve for gamma or (1 - gamma). In fact in bubbleFoam both equations are coded and there is a method to combine the solution which I had hoped might improve robustness but it didn't make a difference to the overall behaviour of the algorithm.
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