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Old   March 19, 2004, 05:12
Default Can fluent simulate this?
  #1
Ryan
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I use VOF model to simulate the free surface flow (air and water). Now I want to include a vertically moving object into it. The object is submerged by water, moving up at a constant speed until a little below the surface of water. The objective is to study the effect of object motion on free surface flow.

Can Fluent simulate it? I had accomplished the simulation of free surface flow without moving object. How can the motion be included? Any adjustments to the previous work?

regards
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Old   March 20, 2004, 08:11
Default Re: Can fluent simulate this?
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mateus
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Hi!

You'll have to use dynamic mesh for that problem...Maybe, but realy just maybe it could be done with sliding mesh...

regards

MATEUS
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Old   March 23, 2004, 07:25
Default Re: Can fluent simulate this?
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phil
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I have been looking into a similar problem, it would seem with fluent 6.1 you should be able ot do it however it will fail. 6.2 should manage to do this problem I am told through a change they have made which allows for compressibility of the water
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Old   March 23, 2004, 08:42
Default Re: Can fluent simulate this?
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Ryan
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Is your problem related to water's compressibility? However, in my problem, objects' velocity is very low, and water can be treated as uncompressible. I don't know how to include object's vertical motion into the simulation. How did you handle it?

If uncompressible, could Fluent 6.1 do this? Another question, when will 6.2 be published?

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Old   March 23, 2004, 08:53
Default Re: Can fluent simulate this?
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phil
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No my problem isnt related to water compressibility as such, basically i am trying to model bouyancy of an object and trhe motion relative to small changes in free surface position. I'm afraid I can't remember the full explanation as to why the water needs to be treated as compressible (only a very small compressibility)however it did seem to make sense at the time. I have seen a case modelled in a pre-release version of 6.2 and it appears to work ok. As for when its available, im not sure i was told that beta versions would be released shortly. It is probably worth your while contacting fluent to find out beta release and full release dates
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Old   March 23, 2004, 09:24
Default Re: Can fluent simulate this?
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Ryan
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Do you have that case at hand? Would you mind sending it to me for a reference?
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Old   March 23, 2004, 09:27
Default Re: Can fluent simulate this?
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phil
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no sorry i dont have it at hand, it was part of a presentation that fluent gave to us to let us know what was coming up in the new release and tempt us into renewing our maintenance.
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