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February 1, 2017, 09:15
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no slip wall condition
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#1 |
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New Member
mohamad ali mirzaei
Join Date: Feb 2017
Posts: 27
Rep Power: 9  |
I want to numerically simulate drilling mud(a power law fluid) flowing inside a well.
for each node, I have 3 equations (continuity,z-comp motion, r-comp motion) which mean I also need 3 equations on boundaries. on wall boundary condition I know vr and vz must be set to zero but I do not know what is 3rd equation on the wall. can anybody help me? best regards |
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February 1, 2017, 10:40
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#2 | |
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Senior Member
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 6,776
Rep Power: 71 |
Quote:
the mass flux has zero normal component on a not-permeable wall, otherwise a permeable wall requires to know an additional condition on the flux |
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February 1, 2017, 11:01
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#3 |
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New Member
mohamad ali mirzaei
Join Date: Feb 2017
Posts: 27
Rep Power: 9 |
i set this condition(vr=0) and vz=0
I'm looking for 3rd condition on the wall |
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February 1, 2017, 11:01
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#4 | |
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Senior Member
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 6,776
Rep Power: 71 |
Quote:
I do not understand, you need to prescribe the BC for each one of the 3 equations .... |
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| Tags |
| boundaries condition, no-slip, wall |
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