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April 7, 2011, 21:13 |
How to measure the dynamic pressure?
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#1 |
New Member
Kooky
Join Date: Mar 2011
Location: Thailand
Posts: 20
Rep Power: 15 |
Dear All,
I have a question of how to measure the dynamic pressure in CFX post. Thank you for your answer. |
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April 7, 2011, 22:38 |
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#2 |
Senior Member
Bharath kumar
Join Date: Apr 2009
Posts: 169
Rep Power: 17 |
Hi kiat,
make an expression like dyn = 0.5*rho*V^2 (or) dyn=total pressure- static pressure then assign a variable like Dynamic pressure to the expression you created in post and plot the contour now. |
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April 8, 2011, 12:07 |
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#3 |
New Member
Kooky
Join Date: Mar 2011
Location: Thailand
Posts: 20
Rep Power: 15 |
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April 10, 2011, 10:44 |
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#4 |
New Member
Kooky
Join Date: Mar 2011
Location: Thailand
Posts: 20
Rep Power: 15 |
Dear All,
I was applying the boundary condition, the mass flow rate at the inlet surface and static pressure is zero at the outlet surface. So, I was checking the static pressure at the outlet surface in CFX post, it did not the same value. Anybody knows how to obtain the same value. [Total pressure is sum of static and dynamic pressure. I measured the total pressure and dynamic pressure at the outlet surface.] Thank you for your respond. |
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March 22, 2017, 04:12 |
something wrong with my dynamic pressure
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#5 |
New Member
Qiong-yao Wang
Join Date: Apr 2014
Posts: 18
Rep Power: 12 |
Thanks for your advice, but my dynamic pressure reached to 1.5e31 according to your advice. Can you explain that? thanks!!
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March 22, 2017, 06:54 |
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#6 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,854
Rep Power: 144 |
Your simulation has diverged. You are just about to get an overflow error, which means this FAQ is relevant: https://www.cfd-online.com/Wiki/Ansy...do_about_it.3F
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