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InterFoam viscosity problem / possible bug

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Old   July 15, 2012, 01:57
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ehsan
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Dear All

Please see Eq. 4 in the paper below:

http://www.marinepropulsors.com/proc...0Propulsor.pdf

May I ask you whether in OpenFOAM the same equation including turbulence effects are used for viscosity of two phase flow or only simple averaging from laminar values are employed?

Best Regards
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Old   August 16, 2012, 17:47
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David
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any news about this issue , I am using a Herschel Bulkely model and tried setting the momentum predictor On or Off and I usually get unstability in case of turniing the momentum predictor on and less gravitional effect when turninhg it off ??
this problem is becoming annoying and i had no clue about it now!!1
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Old   October 29, 2012, 04:43
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Mohsen KiaMansouri
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Quote:
Originally Posted by ehsan View Post
Dear All

Please see Eq. 4 in the paper below:

http://www.marinepropulsors.com/proc...0Propulsor.pdf

May I ask you whether in OpenFOAM the same equation including turbulence effects are used for viscosity of two phase flow or only simple averaging from laminar values are employed?

Best Regards
Dear Ehsan,

please take a look at the interFoam solver. you will see sth like this:

surfaceScalarField muEff
(
"muEff",
twoPhaseProperties.muf()
+ fvc::interpolate(rho*turbulence->nut())
);

So OF will Consider both viscosities

Best Regards,
Mohsen
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