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Trimmer Vs Polyhedral - Drastic fall in data for poly mesh

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Old   October 6, 2017, 11:27
Exclamation Trimmer Vs Polyhedral - Drastic fall in data for poly mesh
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Bharat
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Hello,

i am comparing results for an HVAC system with different meshes(timmer and poly).with trimmer mesh the results are quite acceptable. on the otherside, i am not changing anything, like mesh settings, boundary conditions etc.
coming to the results i am seeing a drastic fall in the data (avg. velocities, avg. pressure, mass flow rate etc.) collected for poly mesh.

can anyone share ideologies what can possibly go wrong?
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Old   October 12, 2017, 06:06
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Guillaume Jolly
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Hi Bharatt, you probably have a strong gradient (in velocity?) and your polyhedral mesh is not capturing it?
What part of the HVAC system are you modelling?

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Old   December 5, 2017, 07:45
Default poly is good
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Ashok Chaudhari
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Quote:
Originally Posted by Bharatt View Post
Hello,

i am comparing results for an HVAC system with different meshes(timmer and poly).with trimmer mesh the results are quite acceptable. on the otherside, i am not changing anything, like mesh settings, boundary conditions etc.
coming to the results i am seeing a drastic fall in the data (avg. velocities, avg. pressure, mass flow rate etc.) collected for poly mesh.

can anyone share ideologies what can possibly go wrong?
If mesh is done right poly should give very good results. I prefer using trimmer only when mesh count is an issue. So problem may be in mesh itself.
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