[swak4Foam] Normal component of velocity in groovyBC

SirIsaac90 · July 12, 2016, 05:51

Hi Foamers!

I am struggling with with a pressure BC with groovyBC.

I want to define a groovyTotalPressure where p0Expression looks as follows:

Code:

p0Expression    "(U*normal() > 0) && (p < 99500) ? base - (mag(U)*a_max + b_max*mag(U)*mag(U)) : 99500";

Unfortunately, it does not work with the "normal()" multiplier. How to get the normal component of the velocities on a patch? Where is my fault?

I would be pleased if anyone can help me!

Regards
JW

SirIsaac90 · July 14, 2016, 04:43

Hi!

Problem is already solved.
I did it with

U&normal().

At least it gave me the correct results.

Regards,
JW

July 12, 2016, 05:51	Normal component of velocity in groovyBC	#1
SirIsaac90 New Member Justin Wiegmann Join Date: Aug 2015 Posts: 20 Rep Power: 11	Hi Foamers! I am struggling with with a pressure BC with groovyBC. I want to define a groovyTotalPressure where p0Expression looks as follows: Code: p0Expression "(Unormal() > 0) && (p < 99500) ? base - (mag(U)a_max + b_maxmag(U)mag(U)) : 99500"; Unfortunately, it does not work with the "normal()" multiplier. How to get the normal component of the velocities on a patch? Where is my fault? I would be pleased if anyone can help me! Regards JW

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July 14, 2016, 04:43		#2
SirIsaac90 New Member Justin Wiegmann Join Date: Aug 2015 Posts: 20 Rep Power: 11	Hi! Problem is already solved. I did it with U&normal(). At least it gave me the correct results. Regards, JW