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mesh size in Eulerian multiphase flow - liquid/solid mixture

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Old   April 3, 2011, 21:15
Default mesh size in Eulerian multiphase flow - liquid/solid mixture
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Hello,

I am considering a solid-liquid mixture multiphase flow in pipe flow.
If a solid particle diameter is 10 micron, does the mesh size should be smaller than the particle dimater in the Eulerian multiphase flow model?

Thank you in advance!
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Old   April 4, 2011, 08:09
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Definately not. The main intention of eulerian method is to avoid the exact spatial resolution of the secondary phase but to model the dynamics and phase-interaction using several complex correlations. However, your mesh should at least resolve all features of the primary phase flow dynamics.

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Old   April 4, 2011, 18:19
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Thank you, coglione.
It helps me a lot.
Have a good one.
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Old   June 10, 2014, 12:53
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Hello,
I am simulating multiphase flow over airfoil. For single phase flow simulation using trans SST model at Re=500000, I have to make the first node point distance from airfoil wall to be 10^-6 m. The results are within 5 % error. When I am simulating (using same mesh) multiphase flow with particles of dia. 10^-4 using mixture model with 1% volumetric concentration, the solution is diverging. Is it because my mesh size near the airfoil is smaller than the particle size?
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