FLUENT FUEL CELL MODEL

June 24, 2005, 12:33

Hi,All I am using FLUENT Fuel Cell Toolbox to model a single PEM fuel cell stack.When I tried to initialize the model, I got the following error messages. Error: prf-set-var: invalid flonum Error Object: nan

Anyone knows how to solve the problem? Does that mean that I didn't specify all the required material properties correctly? I am desperate. Please help!

BC

karmagos · January 30, 2010, 03:52

what version did you use?

shrinivaslokare · July 12, 2011, 20:25

I have the same problem when I modified a case in fluent 13.0 and tried to read it in Fluent 12.1.4. I checked the case file is good by opening it in Fluent 13 multiple times. But with Fluent 12.1.4, it gives the same error message:
"Error: %prf-set-var: invalid flonum"

Any clue whats going on?

Thanks.

Shrinivas

Roberto Meloni · July 7, 2013, 12:59

Hi guys,
Did anyone fix this fluent bug?
I'm running a simulation on Ansys 13 of an internal combustion engine and when I try to load the .cas and .dat files saved every 15 time step, this error message appears.

Thanks in advance.
All the best.
Rob.

AlexHo · May 17, 2014, 19:27

Probably because of the different version of Fluent.

sanjeevkumar patne · November 22, 2016, 02:23

I too have the same problem.

I just considered the cylinder and given inlet velocity at one side and outlet pressure at the other side.
1. defined the surfaces as the temperature body
2. inlet air velocity 8 m/s.
3. trying to find the cooling response of the system.

In cell zone BC
when I define cylinder as fluid then there was no error, but I defined it as solid the error was showing as below

Error - %prf-set-var: invalid flonum
Error object - 1.£ inf

Kindly anyone suggest what is the problem.

Thanks in advance.

sanjeevkumar patne · November 22, 2016, 02:24

I am working in ANSYS Fluent 15 version

June 24, 2005, 12:33	FLUENT FUEL CELL MODEL	#1
BC Guest Posts: n/a	Hi,All I am using FLUENT Fuel Cell Toolbox to model a single PEM fuel cell stack.When I tried to initialize the model, I got the following error messages. Error: prf-set-var: invalid flonum Error Object: nan Anyone knows how to solve the problem? Does that mean that I didn't specify all the required material properties correctly? I am desperate. Please help! BC

July 12, 2011, 20:25	Same issue	#3
shrinivaslokare New Member Shrinivas Join Date: Jun 2011 Posts: 1 Rep Power: 0	I have the same problem when I modified a case in fluent 13.0 and tried to read it in Fluent 12.1.4. I checked the case file is good by opening it in Fluent 13 multiple times. But with Fluent 12.1.4, it gives the same error message: "Error: %prf-set-var: invalid flonum" Any clue whats going on? Thanks. Shrinivas

November 22, 2016, 02:23	cylinder	#6
sanjeevkumar patne New Member sanju Join Date: Nov 2016 Posts: 19 Rep Power: 10	I too have the same problem. I just considered the cylinder and given inlet velocity at one side and outlet pressure at the other side. 1. defined the surfaces as the temperature body 2. inlet air velocity 8 m/s. 3. trying to find the cooling response of the system. In cell zone BC when I define cylinder as fluid then there was no error, but I defined it as solid the error was showing as below Error - %prf-set-var: invalid flonum Error object - 1.£ inf Kindly anyone suggest what is the problem. Thanks in advance.

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January 30, 2010, 03:52		#2
karmagos New Member Philip Mprezas ( f.mprezas@yahoo.gr ) Join Date: Jan 2010 Location: Athens, Greece Posts: 13 Rep Power: 16	what version did you use?

July 7, 2013, 12:59		#4
Roberto Meloni New Member Roberto Meloni Join Date: Dec 2012 Posts: 14 Rep Power: 14	Hi guys, Did anyone fix this fluent bug? I'm running a simulation on Ansys 13 of an internal combustion engine and when I try to load the .cas and .dat files saved every 15 time step, this error message appears. Thanks in advance. All the best. Rob.

May 17, 2014, 19:27		#5
AlexHo New Member YuHuo Join Date: May 2014 Location: Hoboken Posts: 1 Rep Power: 0	Probably because of the different version of Fluent.

November 22, 2016, 02:24		#7
sanjeevkumar patne New Member sanju Join Date: Nov 2016 Posts: 19 Rep Power: 10	I am working in ANSYS Fluent 15 version