inertial resistance UDF

October 4, 2004, 08:36

Wich macro do I have to use for setting the inertial resistance in the porous zone panel? (BOUNDERY CONDITIONS --> fluid --> POROUS ZONE). In the manual: DEFINE_PROPERTY, but if I do that it gives two error: 1!=2 and void udf function expected

Thank you for helping me!

October 4, 2004, 11:08

Hi Mr.Arnout, You must use Define_profile macro for that it is a mistake in fluent manual.

Regards!

zhhjll · June 22, 2011, 06:16

I want to model a micro filter, This filter (membrane) is rectangular (10×5 cm) with the thickness 12e-5. so,I calculate this parameters from Ergun equation which D=1e-6, because of the Micro filter type. is this assumption true??
i think this is very thin filter so there in not flow through in the membrane, in this situation is inertial coefficieant higher in Y direction? or not?when i set y-direction inertial coefficient higher than x-direction got better answer! is this resonable?

xdanielx · June 22, 2011, 07:07

Probably you should model this as a porous-jump. With this assumpion you do not need to resolve the thickness ...

good luck

October 4, 2004, 08:36	inertial resistance UDF	#1
Arnout Klinkenberg Guest Posts: n/a	Wich macro do I have to use for setting the inertial resistance in the porous zone panel? (BOUNDERY CONDITIONS --> fluid --> POROUS ZONE). In the manual: DEFINE_PROPERTY, but if I do that it gives two error: 1!=2 and void udf function expected Thank you for helping me!

October 4, 2004, 11:08	Re: inertial resistance UDF	#2
Naresh Guest Posts: n/a	Hi Mr.Arnout, You must use Define_profile macro for that it is a mistake in fluent manual. Regards!

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June 22, 2011, 06:16		#3
zhhjll New Member zohreh Join Date: Feb 2011 Location: Tehran Posts: 20 Rep Power: 15	I want to model a micro filter, This filter (membrane) is rectangular (10×5 cm) with the thickness 12e-5. so,I calculate this parameters from Ergun equation which D=1e-6, because of the Micro filter type. is this assumption true?? i think this is very thin filter so there in not flow through in the membrane, in this situation is inertial coefficieant higher in Y direction? or not?when i set y-direction inertial coefficient higher than x-direction got better answer! is this resonable?

June 22, 2011, 07:07		#4
xdanielx New Member Daniel Langmayr Join Date: Mar 2009 Posts: 15 Rep Power: 17	Probably you should model this as a porous-jump. With this assumpion you do not need to resolve the thickness ... good luck