Uds

Nishant_Sharma · June 1, 2018, 02:08

Hi all,

I am getting an error in fluent solver while trying to revalidate a thesis.

Error: \nHaving flux boundary conditions for uds-0 on anode and cathode external contacts is not supported.\nPlease specify value boundary conditions for uds-0 on at least one external contact.\n
Error Object: #f

I am not able to understand why the fluent is asking for UDS, also when I am trying to make no. of UDS = 0, it shows the error

Error: Insufficient number of UDS. 4 required, but only 0 allocated!
Error Object: #f

Even though I am using the UDF for defining the diffusivities of the species it is asking for UDS, please reply how to remove this.

Thank you

pooya_1375 · February 20, 2019, 05:22

Dear Nishant
Did you solve that problem?

AlexanderZ · February 21, 2019, 00:03

model that you are trying to use has UDS, most likely you are using PEM?

there is a description in your error, where you may clearly see what is a problem

Code:

Error: \nHaving flux boundary conditions for uds-0 on anode and cathode external contacts is not supported

flux boundary conditions for uds-0 on anode and cathode external contacts is not supported

that's it

best regards

June 1, 2018, 02:08	Uds	#1
Nishant_Sharma Member Anomymous Join Date: May 2018 Posts: 31 Rep Power: 7	Hi all, I am getting an error in fluent solver while trying to revalidate a thesis. Error: \nHaving flux boundary conditions for uds-0 on anode and cathode external contacts is not supported.\nPlease specify value boundary conditions for uds-0 on at least one external contact.\n Error Object: #f I am not able to understand why the fluent is asking for UDS, also when I am trying to make no. of UDS = 0, it shows the error Error: Insufficient number of UDS. 4 required, but only 0 allocated! Error Object: #f Even though I am using the UDF for defining the diffusivities of the species it is asking for UDS, please reply how to remove this. Thank you

February 21, 2019, 00:03		#3
AlexanderZ Senior Member Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34	model that you are trying to use has UDS, most likely you are using PEM? there is a description in your error, where you may clearly see what is a problem Code: Error: \nHaving flux boundary conditions for uds-0 on anode and cathode external contacts is not supported flux boundary conditions for uds-0 on anode and cathode external contacts is not supported that's it best regards

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
When to use User-defined Scalar (UDS) for concentration?	THC	FLUENT	1	May 30, 2019 09:04
How can I solve dot product field of UDS in fluent?	swtbkim	FLUENT	3	November 17, 2017 07:31
Set UDS on wall...	fivos	Fluent UDF and Scheme Programming	2	July 25, 2014 05:57
Calculate UDS flux through the wall	ananth_01	FLUENT	0	August 5, 2013 07:33
Doubts UDS Flux, UDS Unsteady for VOF model	kel85uk	FLUENT	0	March 17, 2010 08:53

February 20, 2019, 05:22		#2
pooya_1375 New Member Pooya Razaghi Join Date: Aug 2016 Posts: 5 Rep Power: 9	Dear Nishant Did you solve that problem?