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May 12, 2012, 18:26 |
HELP TIME on FLUENT
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#1 |
New Member
slim
Join Date: Apr 2012
Posts: 18
Rep Power: 14 |
hello,
I simulated a fluid flow in a straight pipe with ANSYS Fluent : Inlet velocity : 0.116 m/s Outlet pressure 400 Pa with mass flow rate 0.063 kg/s Time step size: 60 seconds Number of time step: 5 Number of iterations / time step: 300 I find the same result I noticed that the solver resolves five blocks of 300 iterations each time, is it recalculates every time? 60 seconds is enough or must I fix a few minutes thank you very much |
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May 12, 2012, 19:37 |
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#2 | |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,762
Rep Power: 66 |
Quote:
isn't this a steady problem? none of your boundary conditions appear to be transient, your simulation will be steady even if you run a transient simulation. |
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May 13, 2012, 06:04 |
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#3 |
New Member
slim
Join Date: Apr 2012
Posts: 18
Rep Power: 14 |
hello,
I try to simulate flow between two cylinders. Normally I should get a constant velocity profile along the length (figure 1). Fig 1.gif But, I found an acceleration along the entire length of the cylinder (figure 2). Fig 2.gif Change speed / length axis> 0 normally it must be = 0 I can not find the trick. Is that it's normal? thank you |
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Tags |
cfd, flow, fluent, pipe flow, time |
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