Weighted average volume fraction
Hello,
I am simulating 2-phase solid-liquid flow in mixing tank using Eulerian model. My study concentrate on the concentration of solids in the tank. I have no injections of solids or liquid in the tank (the impeller mixes the 2 phases). I assumed an initial homogenous mixture with solid volume fraction of 0.04 by patching this value before iteration. After the solution converged, i found the Weighted average volume fraction is lower than 0.04, it was equal to 0.023. I tried to turn off the volume fraction equation but,When i turned the volume fraction equation off, the mixture became homogenous as initialized and no particle distribution obtained. how can i fix the volume fraction of the solid in the whole tank while the concentration still can change?? Thanks for help |
Re: Weighted average volume fraction
i didn't solve my problem yet
anyone can help |
I have the same problem in solid-liquid mixing tank using the MRF model for impeller rotation. The solid volume fraction becomes lower and lower during the iteration. Please help us. Many thanks.
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I'm using Fluent 12.0 Any help would be greatly appreciated |
I've overcome those non-constant Volume Fraction during iteration problem.
I was using the steady-state method when i encounter the first problem; But after i try to use unsteady state Transient using simple time step and a few iterations in every time step, i had constant a Volume fraction! Gladly, i solve one problem. But another problem occur. I have a "cracked" contour in my case. I'll explain clearly in a new thread. Thank you, Hope that helps. |
Hi all.
I am new to fluent. Please tell me where to how and where to patch the udf for variation in solid volume fraction in Fluent 15.0. P.S: My udf's are already compiled and loaded. Please reply at soumendu.dasgupta@gmail.com Thanks |
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