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April 22, 2012, 13:23 |
High skin friction coefficient,
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#1 |
New Member
Join Date: Mar 2012
Posts: 12
Rep Power: 14 |
Hello all,
I tried to do the tutorial of the cornell website for the turbulent flow, with the pipe dimenstion 8mX0.1m. and the inlet velocity of 1 m/s. choosing k-epsilon turbulence flow. but choosing material as water ( density-1000 kg/m3, and viscosity 0.0007 pa.s). I tried to make the mesh fine, to have low yplus ( I obtained yplus about 0.3 for fully developerd flow). but i wonder why the skin friction coefficient is 3.5 while in the moody diagram the maximum value is 0.1? why my result doesn't match with moody diagram. i attached the skin friction plot here. thanks skin friction.jpg |
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Tags |
skin friction coefficient, turbulence |
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