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Difference of definition between HEM and VOF models |
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#1 |
Senior Member
Baris (Heewa)
Join Date: Jan 2013
Location: Japan
Posts: 130
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Dear Foam USers,
I am trying to make simulation of cavitation in nozzle and confused about the differences between HEM and VOF models which are used in cavitatingFOAM and InterPhaseChangeFoam. When i look at the definitions of the solvers: HTML Code:
1. [B]interPhaseChangeFoam[/B]: (incompressible) VOF+ Transport equation of vapor fraction→ source terms for vaporization and condensation 2. [B]cavitatingFoam[/B]:(compessible) HEM (homogeneous equilibirum model)+ Barotropic equation of state ρ=f(P)→EOS in continuity eq. to produce pressure eq. (linear model for compressibility) Also when i look at the original Schneer HTML Code:
[Schnerr G, Sauer J. Physical and numerical modeling of unsteady cavitation dynamics. Fourth International Conference on Multiphase Flow, New Orleans, USA2001.] HTML Code:
[Yuan W, Schnerr GH. Optimization of Two-Phase Flow in Injection Nozzles: Interaction of Cavitation and External Jet Formation. ASME; 2002.] and in another paper above explanation is called homogeneous mixtured model.: HTML Code:
Kunz RF, Boger DA, Stinebring DR, Chyczewski TS, Lindau JW, Gibeling HJ, et al. A preconditioned Navier–Stokes method for two-phase flows with application to cavitation prediction. Computers & Fluids. 2000;29:849-75. If i am wrong please someone can correct me... Thanks in advance... |
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#2 | |
Retired Super Moderator
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 10,978
Blog Entries: 45
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Hi shipman,
In my limited experience on this topic:
Best regards, Bruno
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