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how to simulate a granule falling down in water

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Old   December 17, 2008, 07:47
Default how to simulate a granule falling down in water
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poiu
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hellow:

I want to use FLUNT to simulate the progress of a granule falling down from water.But i have no idea how to set the model,can you give me a help? Should i use the moving mesh? If the granule is a porous one,how to set the profile of it in FLUENT?

Thank you.
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Old   December 17, 2008, 20:45
Default Re: how to simulate a granule falling down in wate
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Yasser Selima
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I think you don't have to use moving mesh. you should use Discrete phase model (DPM) and let your granule enter from the top.
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Old   December 17, 2008, 21:22
Default Re: how to simulate a granule falling down in wate
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poiu
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Thanks for your answer,but i have some question. The granule is not a small particle,it's diameter is about 2 mm and it is a porous one,so if i use the DPM,how to set my granule?
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Old   December 18, 2008, 04:28
Default Re: how to simulate a granule falling down in wate
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Rami
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The "Solving a 2D Box Falling into Water" tutorial might help.

Go to http://www.fluentusers.com/fluent/tr...ials/index.htm (need no subscribe) and scroll down to this tutorial.

I must say I myself am stuck with application of the dynamic mesh in a similar (but somewhat more complicated) problem of few solids sinking and floating in a fluid. Support from the local agent and Fluent support is delayed for a long time, so I really can't say for sure how good the dynamic mesh is (but can say for sure their support level is lousy). However, since you need to model a single solid - you may be more successful than me...
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