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Capillary meniscus between liquid and vapor phases

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Old   April 12, 2005, 11:49
Default Capillary meniscus between liquid and vapor phases
  #1
Srinivas Parimi
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Hello all,

I am trying to model a capillary and am trying to do meniscus analysis using fluent. Is there any help, I can get from the group regarding meniscus analysis.

thank you

srinivas parimi
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Old   April 14, 2005, 11:41
Default Re: Capillary meniscus between liquid and vapor ph
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swarup
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i have seen one example on Flow3D website but do not know any such example in FLUENT. you may have to use VOF model though since you want to track interface development. Best of Luck,

Swarup.
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Old   April 14, 2005, 13:11
Default Re: Capillary meniscus between liquid and vapor ph
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edi ghirardi
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Swarup is right, I've seen the same example too. The multiphase model to be chosen is VOF indeed. I think you have to enable the wall adhesion option (I can't remember if you can also specify the contact angle, anyway I read somewhere that it could be set not less than 5degrees) and specify also the surface tension, both on the phase interaction panel.

Hope it could be helpful

Edi.
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Old   April 15, 2005, 12:21
Default Re: Capillary meniscus between liquid and vapor ph
  #4
Srinivas Parimi
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hello swarup and edi,

thank you for your excellent suggestions. I am using VOF in implicit mode with wall adhesion and surface tension ON. The contact angle I am specifying is 20 degrees. The problem I am facing is that the meniscus which supposed to form a hemispherical shape at 54 kPascal is sagging beyond hemisperical shape into some odd shape at 2 kPascal. I am not sure what I am doing wrong but I would like the meniscus to hold till the capillary breakdown and then the meniscus to break.

thank you srinivas parimi
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