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Alphawater go down abruptly to a small number

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Old   May 7, 2020, 06:00
Default Alphawater go down abruptly to a small number
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Hi Foamers,

I am about to use interFoam for mudflow simulations using Herschel-Bulkley rheology. prior to my main job, I am simulating the conventional 3d dambreak by only changing the rheology of the fluid and assuming laminar flow. When I do simulate by varying the parameters tau0 and k, for certain combination of these parameters, I am facing this problem:

- After certain time step the fluid with alphawater=1.0 is disappearing. At some point of time alpha always go down abruptly to a very small number (order of 1.0e-5 even lower).
- I can't understand the physical implication. Does this have anything with my mesh size?
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