cfx BC profile error

zese · June 6, 2020, 15:25

Dear Friends

I want to use BC profile of mass flow at the inlet but it gives me the following error.
The parameter 'Mass Flow Rate' in object '/FLOW:Flow Analysis 1/DOMAIN

omain 1/BOUNDARY:Boundary 1/BOUNDARY CONDITIONS/MASS AND MOMENTUM' is defined to be "Single Valued" but it depends on the following field valued variables: , x, y, z.

do you know what I should do?

Gert-Jan · June 6, 2020, 16:30

Show us the output file. That will give the required info.

zese · June 7, 2020, 07:37

Quote:

Originally Posted by Gert-Jan

Show us the output file. That will give the required info.

Dear Gert-Jan

the error is shown in my cfx pre file and the simulation doesnt run until it get fixed. I attached output file.

Thanks in advance

Gert-Jan · June 7, 2020, 15:45

You cannot set a massflow as function of x,y,z. The mass flow must be a single value. Something like 1 [kg/s]. The software will adapt the local velocity (nad possible Density through Pressure) such that the massflow is achieved.

The best solution would be to set the velocity as function of x,y,z.

June 6, 2020, 15:25	cfx BC profile error	#1
zese Senior Member Zese Join Date: Sep 2013 Posts: 102 Rep Power: 12	Dear Friends I want to use BC profile of mass flow at the inlet but it gives me the following error. The parameter 'Mass Flow Rate' in object '/FLOW:Flow Analysis 1/DOMAINomain 1/BOUNDARY:Boundary 1/BOUNDARY CONDITIONS/MASS AND MOMENTUM' is defined to be "Single Valued" but it depends on the following field valued variables: , x, y, z. do you know what I should do?

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June 6, 2020, 16:30		#2
Gert-Jan Senior Member Gert-Jan Join Date: Oct 2012 Location: Europe Posts: 1,827 Rep Power: 27	Show us the output file. That will give the required info.

June 7, 2020, 15:45		#4
Gert-Jan Senior Member Gert-Jan Join Date: Oct 2012 Location: Europe Posts: 1,827 Rep Power: 27	You cannot set a massflow as function of x,y,z. The mass flow must be a single value. Something like 1 [kg/s]. The software will adapt the local velocity (nad possible Density through Pressure) such that the massflow is achieved. The best solution would be to set the velocity as function of x,y,z.