unit normal vector

Marta_ · November 6, 2015, 12:25

Hi everyone,

I'm running a Les of a turbulent flow around a square cylinder. I would need to evaluate, at every time step, this quantity: p*(n_x + n_y + n_z).

p pressure
(n_x, n_y, n_z) unit normal vector to surfaces

Could anyone help me?

Really thank you
Marta

jherb · November 12, 2015, 15:58

Perhaps swak4foam can help you (https://openfoamwiki.net/index.php/Contrib/swak4Foam). Especially this example uses the normals of faces:
https://openfoamwiki.net/index.php/C...ectionalForces

Marta_ · November 13, 2015, 08:39

Thanks a lot,

actually I would prefer to evaluate that quantity during the time loop, because I than take its divergence and I add other terms coming from the velocity U.

But for sure I'm having a look on what you sent me.

Thanks again
Marta

November 6, 2015, 12:25	unit normal vector	#1
Marta_ New Member Marta Join Date: Jul 2015 Location: Rome Posts: 7 Rep Power: 10	Hi everyone, I'm running a Les of a turbulent flow around a square cylinder. I would need to evaluate, at every time step, this quantity: p*(n_x + n_y + n_z). p pressure (n_x, n_y, n_z) unit normal vector to surfaces Could anyone help me? Really thank you Marta

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November 12, 2015, 15:58		#2
jherb Senior Member Joachim Herb Join Date: Sep 2010 Posts: 650 Rep Power: 21	Perhaps swak4foam can help you (https://openfoamwiki.net/index.php/Contrib/swak4Foam). Especially this example uses the normals of faces: https://openfoamwiki.net/index.php/C...ectionalForces

November 13, 2015, 08:39		#3
Marta_ New Member Marta Join Date: Jul 2015 Location: Rome Posts: 7 Rep Power: 10	Thanks a lot, actually I would prefer to evaluate that quantity during the time loop, because I than take its divergence and I add other terms coming from the velocity U. But for sure I'm having a look on what you sent me. Thanks again Marta