How to get the current density using TUI in Fluent PEMFC module?

Prince Abraham · October 30, 2015, 12:06

I'm new to fluent. I have modeled a single cell PEMFC & specified its boundary conditions, operating parameters etc., and I’ve run the calculation and the solutions are converged.

Now I am struggling to get the current flux density (for plotting iv curve). When I try to report the current density, it thrown out the following error.

/report/surface-integrals> integral
()
surface id(1) [()] terminal_c
surface id(2) [()]

Error: GENERAL-CAR-CDR: invalid argument [1]: improper list
Error Object: #f

Then i got the zone id by the following command
/define/models/resolved-MEA-fuelcells/anode-setup> list
What zones to list? (all cell face boundary) ["all"]
Sort alphabetically by zone name? Else sorted by zone id. [yes]

and tried another attempt by entering the"Zone ID" as "Surface ID" and again got an error message shown below

/report/surface-integrals> integral
()
surface id(1) [()] 88
Invalid surface.

Zone ID is different from surface ID? or the same (the zone terminal itself a surface)?

Prince Abraham · November 2, 2015, 11:57

Im sorry. I forgotten to create "named selection" while meshing !
Thats y i couldn't find that surface(terminal) while getting reports.

Now its working well..

October 30, 2015, 12:06	problem in reporting current flux density using TUI in Fluent PEMFC module	#1
Prince Abraham New Member Prince Abraham Join Date: Oct 2015 Location: Kovilpatti Posts: 5 Rep Power: 10	I'm new to fluent. I have modeled a single cell PEMFC & specified its boundary conditions, operating parameters etc., and I’ve run the calculation and the solutions are converged. Now I am struggling to get the current flux density (for plotting iv curve). When I try to report the current density, it thrown out the following error. /report/surface-integrals> integral () surface id(1) [()] terminal_c surface id(2) [()] Error: GENERAL-CAR-CDR: invalid argument [1]: improper list Error Object: #f Then i got the zone id by the following command /define/models/resolved-MEA-fuelcells/anode-setup> list What zones to list? (all cell face boundary) ["all"] Sort alphabetically by zone name? Else sorted by zone id. [yes] and tried another attempt by entering the"Zone ID" as "Surface ID" and again got an error message shown below /report/surface-integrals> integral () surface id(1) [()] 88 Invalid surface. Zone ID is different from surface ID? or the same (the zone terminal itself a surface)? Last edited by Prince Abraham; November 1, 2015 at 07:44.

November 2, 2015, 11:57	sorry guys..	#2
Prince Abraham New Member Prince Abraham Join Date: Oct 2015 Location: Kovilpatti Posts: 5 Rep Power: 10	Im sorry. I forgotten to create "named selection" while meshing ! Thats y i couldn't find that surface(terminal) while getting reports. Now its working well..

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