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Recreating Jet Flow in COMSOL

Posted Mar 3, 2013, 1:05 p.m. EST Version 4.3a 1 Reply

Kim Metzler
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I have temporal and spatial velocity profiles that I would like to try and recreate in COMSOL. At 0mm from the nozzle (d = 2.4 mm) the velocity is 110 m/s and at 12 mm the velocity is about 100 m/s. It is a 30 ms pulse and fluid is air. I have tried matching these parameters but have not had any luck. I am specifically struggling with time dependence and was wondering if anybody had any suggestions on how to model this effectively. Thank you in advance!

I have attached a screenshot of the velocity profile along with my model.

Thanks again!

Jen & Kim
1 Reply Last Post Jun 4, 2013, 8:28 a.m. EDT
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Hello Kim Metzler

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Ekkehard Holzbecher
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Posted: 1 decade ago Jun 4, 2013, 8:28 a.m. EDT
Hi - you can model only half of the system. Take the symmetry axis r=0 as boundary on the left.
You don't loose any results, but have a more slender model with shorter execution time.

Hi - you can model only half of the system. Take the symmetry axis r=0 as boundary on the left. You don't loose any results, but have a more slender model with shorter execution time.

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