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Urgent star ccm help

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Old   January 27, 2012, 19:43
Default Urgent star ccm help
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Ke Wu
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Hi
I'm a fresher in CFD and Star ccm
I'm modelling a simple case which is 3D larminar internal flow in a pipe
Pipe length = 1000mm
Pipe diameter = 10mm
Mesh size = 0.5mm
Velocity = 0.3m/s
I attached some plots and you can have a look
However the plot for fully developed velocity profile is incorrect
Anyone can point out which step I got wrong?
How do I fix this problem?
Thanks in advance
Attached Images
File Type: jpg mesh 0.5mm.jpg (35.3 KB, 38 views)
File Type: jpg Fully Developed Velocity Profile.jpg (31.7 KB, 37 views)
File Type: jpg Fully Development Length.jpg (33.3 KB, 29 views)
File Type: jpg Static Pressure.jpg (33.2 KB, 28 views)
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Old   January 29, 2012, 07:35
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Check the position and direction of your line probe. You can also create an plane section to visualize the velocity distribution at a scalar scene at the position where your line probe is. Does the scalar displayer also shows just three areas of velocity?
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Old   January 29, 2012, 10:16
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Jiashing Liu
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Hi,
1. Uniform flow on the face of inlet comparing with parabolic patterm flow.
2. Do you add the prism layer near the wall?

There is a simulation about the fully development flow in the user guide of Star-CCM+, validations parts.

BR
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Old   January 29, 2012, 11:21
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Ke Wu
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Quote:
Originally Posted by anunu View Post
Hi,
1. Uniform flow on the face of inlet comparing with parabolic patterm flow.
2. Do you add the prism layer near the wall?

There is a simulation about the fully development flow in the user guide of Star-CCM+, validations parts.

BR
Hi anunu
actually I used trimmer and surface remesher
I did some modification in mesh and you can have a look
I went through some info from help guide of star ccm
It is said that an interface needed to be created, is it right?
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File Type: jpg 200 10 mesh 1mm.jpg (53.8 KB, 31 views)
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Old   February 2, 2012, 18:54
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Ke,

Your mesh looks fine. Create a line probe with resolution you want. create the line probe across the diameter in the flow field with input part as your fluid region.

I hope this solves your problem.

P.S. I would also suggest to create prism layer to examine boundary layers. \
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