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Old   February 25, 2006, 07:06
Default continuity residual
  #1
majesticcc
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Hi!ı am trying to solve a laminar flow in the neighbourhood of a disk rotating in fluid at rest.I am using 2d axisymetric swirl solver and laminar model.angular velocity of disk is 0.5 rad/s.But residuals of contunity did not decrease enough ı can not find the reason is there any body have an idea about this problem?

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Old   February 25, 2006, 07:35
Default Re: continuity residual
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Thomas
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Are u sure this is a laminar problem? try to use the k-e; it will give good results also if the problem is really laminar. How's your mesh on the boundary?
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Old   February 25, 2006, 08:05
Default Re: continuity residual
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majesticcc
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ı tried different kinds of mesh but the solution is same.also ı used 2d and 2ddp.now a ı am using uniform mesh.Pressure inlet-pressure outlet-wall-axis are my boundary conditions.
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Old   February 26, 2006, 03:31
Default Re: continuity residual
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Kharicha
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Verify that you have enough points within your Ekmann layer...at least 10....

use presto, and use high underrelaxation factor for the pressure and low for the velocity...

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Old   February 27, 2006, 00:00
Default Re: continuity residual
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rener
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sdfa
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