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fluid movement with friction inside a pipe

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Old   September 14, 2011, 08:04
Default fluid movement with friction inside a pipe
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how can one model a movement of fluid inside the tube with considering a friction between fluid and solid (wall of tube)?
thank you
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Old   September 15, 2011, 07:50
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Nobody were aware of the answer?, or even some clue would be very much appreciated,
thank you
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Old   September 15, 2011, 09:30
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Originally Posted by hamid1 View Post
Nobody were aware of the answer?, or even some clue would be very much appreciated,
thank you
I guess the stress on the wall can perform the frictional effect
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Old   September 15, 2011, 11:30
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Quote:
Originally Posted by hamid1 View Post
how can one model a movement of fluid inside the tube with considering a friction between fluid and solid (wall of tube)?
thank you
Dear Hamid,

When you set no-slip condition or shear at walls, you're implicitly consider friction, but if you mean contribution of wall roughness in friction, you've to know that wall roughness doesn't have any effect on shear stress in laminar regime but in turbulent regime you can set it in FLUENT; in this regime both wall function and roughness certainly affect shear stress.

Bests,
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