alpha1 is unbounded -- CFD Online Discussion Forums

October 17, 2012, 04:48

alpha1 is unbounded

GerhardHolzinger

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Gerhard Holzinger

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Hello,

I am trying to simulate a bubble column with twoPhaseEulerFoam. When running my case alpha1 reaches values that should not be possible.

Code:

Courant Number mean: 0.00734422 max: 0.637501
Max Ur Courant Number = 0.453228
Time = 0.675

MULES: Solving for alpha1
Dispersed phase volume fraction = 0.000455625  Min(alpha1) = -0.00187942  Max(alpha1) = 1
MULES: Solving for alpha1
Dispersed phase volume fraction = 0.000455625  Min(alpha1) = -0.540265  Max(alpha1) = 1

There is some checker-boarding next to the inlet. Does anyone have some tips how to eliminate that.

Attached Images

checkerBoardingAlpha1.jpg (12.4 KB, 39 views)

Attached Files

bubbleColumn.tar.gz (5.7 KB, 6 views)

Tags

twophaseeulerfoam

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