|
[Sponsors] |
September 16, 2015, 06:06 |
PEMFC model with FLUENT
|
#1 |
New Member
brahim choice
Join Date: Sep 2015
Posts: 3
Rep Power: 11 |
Hi, I used the tutorial form Fluent for PEMFC :"Tutorial: Modeling a Single-Channel, Counter-Flow Polymer Electrolyte Membrane (PEM) Fuel Cell ", after complete the geometry and the mesh with Gambit and setup Fluent, the calculation halt with issues as "segmentation signal fault, error of convergence, etc.", need help to understand in the Tutoria model of PEMFC really works.
Sincerelyn, |
|
September 16, 2015, 06:50 |
|
#2 |
Senior Member
Bruno Machado
Join Date: May 2014
Posts: 271
Rep Power: 13 |
The tutorial works. The segmentation fault error happens when there is some missing information (boundary condition, variables not properly defined in case you used UDF, etc.). Check is all information need is provided and the segmentation fault should be gone.
|
|
September 16, 2015, 10:23 |
|
#3 |
New Member
brahim choice
Join Date: Sep 2015
Posts: 3
Rep Power: 11 |
I still have issues to run the tutorial. this is the mesh that I used and the the fluent case data. is there a way to have a working EPMFC model to download?.
|
|
June 26, 2016, 03:56 |
|
#4 |
New Member
Dm Fo
Join Date: Apr 2015
Posts: 15
Rep Power: 11 |
I have the same problem with segmentation. Do we solve this error?
|
|
June 26, 2016, 08:14 |
|
#5 |
Senior Member
A-A Azarafza
Join Date: Jan 2013
Posts: 226
Rep Power: 14 |
Hi Friend, Please, be in contact to me for your problem by providing more details..
__________________
Regard yours |
|
June 27, 2016, 03:51 |
|
#6 |
New Member
Dm Fo
Join Date: Apr 2015
Posts: 15
Rep Power: 11 |
I will try to replicate tutorial of PEMFC another one time. First of all, in Fluent 17 (which I use), as well as 16 and 15 versions, I can choose [3] FC and Electrolysis model or [9] PEM FC model. Which model does correspond to tutorial''s model? And what is the difference between them?
|
|
June 27, 2016, 03:56 |
|
#7 | |
Senior Member
A-A Azarafza
Join Date: Jan 2013
Posts: 226
Rep Power: 14 |
Quote:
Hi, The PEMFC model is for the tutorial. FC, and electrolysis corresponds to solid oxide fuel cell and electrolyser (SOFC&SOEC). Regards,
__________________
Regard yours |
||
June 27, 2016, 13:59 |
|
#8 | |
New Member
Dm Fo
Join Date: Apr 2015
Posts: 15
Rep Power: 11 |
Quote:
Finally, following to tutorial I have new error like this: iter continuity x-velocity y-velocity z-velocity energy h2 o2 h2o uds-0 uds-1 uds-2 uds-3 time/iter V_cell = 0.750000 (V) ... V_open = 1.183261 (V) I_anode = 0.182809 (A/cm^2) ... I_cathode = 0.520703 (A/cm^2) ... dI_mea = -0.337894 (A/cm^2) ... dI_stk = -0.337894 (A/cm^2) 1 1.0000e+00 1.0031e-01 9.9029e-01 8.3462e-01 2.5701e+04 0.0000e+00 9.7376e-02 6.1092e-02 8.7309e-12 7.1504e-01 1.0059e+00 1.2889e-07 0:34:19 99 # Divergence detected in AMG for temperature, protective actions enabled! # Divergence detected in AMG for temperature, temporarily solve with BCGSTAB! # Divergence detected in AMG for uds-2, protective actions enabled! # Divergence detected in AMG for uds-2, temporarily solve with BCGSTAB! # Divergence detected in AMG for uds-3, protective actions enabled! # Divergence detected in AMG for uds-3, temporarily solve with BCGSTAB! Warning: Invalid cp (0.000000e+00 J/kgK) for hydrogen at temperature -1.#IND00 K V_cell = 0.750000 (V) ... V_open = 1.163195 ... 1.181110 (V) I_anode = 0.175428 (A/cm^2) ... I_cathode = 0.067200 (A/cm^2) ... dI_mea = 0.108228 (A/cm^2) ... dI_stk = 0.108228 (A/cm^2) Divergence detected in AMG solver: species-0 Divergence detected in AMG solver: species-1 Divergence detected in AMG solver: species-2 Divergence detected in AMG solver: temperature Divergence detected in AMG solver: uds-0 Divergence detected in AMG solver: uds-1 Divergence detected in AMG solver: uds-2 Divergence detected in AMG solver: uds-3 Divergence detected in AMG solver: species-0 Divergence detected in AMG solver: species-1 Divergence detected in AMG solver: species-2 Divergence detected in AMG solver: temperature Divergence detected in AMG solver: uds-0 Divergence detected in AMG solver: uds-1 Divergence detected in AMG solver: uds-2 Divergence detected in AMG solver: uds-3 Divergence detected in AMG solver: species-0 Divergence detected in AMG solver: species-1 Divergence detected in AMG solver: species-2 Divergence detected in AMG solver: temperature Divergence detected in AMG solver: uds-0 Divergence detected in AMG solver: uds-1 Divergence detected in AMG solver: uds-2 Divergence detected in AMG solver: uds-3 reversed flow in 420 faces on pressure-outlet 100. reversed flow in 420 faces on pressure-outlet 101. Divergence detected in AMG solver: species-0 Divergence detected in AMG solver: species-1 Divergence detected in AMG solver: species-2 Divergence detected in AMG solver: temperature Divergence detected in AMG solver: uds-0 Divergence detected in AMG solver: uds-1 Divergence detected in AMG solver: uds-2 Divergence detected in AMG solver: uds-3 Error at Node 3: floating point exception Error at host: floating point exception Error at Node 0: floating point exception Error at Node 1: floating point exception Error at Node 2: floating point exception Error: floating point exception Error Object: #f All steps I screened to file, which you can download - https://yadi.sk/i/_oLMVuzbsq6YX |
||
June 28, 2016, 01:38 |
|
#9 |
New Member
Dm Fo
Join Date: Apr 2015
Posts: 15
Rep Power: 11 |
Strange error:
Warning: Invalid cp (0.000000e+00 J/kgK) for hydrogen at temperature -1.#IND00 K While initialization T=343 K, cp_H2 must be calculated. |
|
June 29, 2016, 00:42 |
|
#10 |
New Member
Dm Fo
Join Date: Apr 2015
Posts: 15
Rep Power: 11 |
It seems I've tried all model's setting, but result is the same - error. Can someone share your own correct fluent model of pem or model from tutorial? I couldn't understand what is wrong in my model.
|
|
July 5, 2016, 00:38 |
|
#11 |
New Member
Dm Fo
Join Date: Apr 2015
Posts: 15
Rep Power: 11 |
I have create new pemfc model with coarse mrsh. During calculating both I_anode and I_cathode equal to 0. Finally, calculation is collapsed. Somebony know what has happened?
|
|
January 8, 2017, 06:01 |
|
#12 |
Senior Member
A-A Azarafza
Join Date: Jan 2013
Posts: 226
Rep Power: 14 |
The issues can arise from different sources. Mesh quality is very important, especially in through-plane direction (y direction in default). One important thing that I experience ever which makes the anodic and cathodic current density zero, is the correct modeling of the surface between the flow channels and GDL. In some cases when you do not observe the rules correctly, you might have created the mentioned surfaces as wall unintentionally. Any possible mistake in splitting the volume would result in such a flaw. Check the surfaces carefully to be ensured that the flows pass through the surfaces into the GDL layer. This was the main reason that I would receive zero current in calculations.
I hope it helps Abouzar
__________________
Regard yours |
|
January 8, 2017, 06:03 |
|
#13 | |
Senior Member
A-A Azarafza
Join Date: Jan 2013
Posts: 226
Rep Power: 14 |
Quote:
The issues can arise from different sources. Mesh quality is very important, especially in through-plane direction (y direction in default). One important thing that I experience ever which makes the anodic and cathodic current density zero, is the correct modeling of the surface between the flow channels and GDL. In some cases when you do not observe the rules correctly, you might have created the mentioned surfaces as wall unintentionally. Any possible mistake in splitting the volume would result in such a flaw. Check the surfaces carefully to be ensured that the flows pass through the surfaces into the GDL layer. This was the main reason that I would receive zero current in calculations. I hope it helps Abouzar
__________________
Regard yours |
||
April 26, 2017, 03:38 |
|
#14 | |
New Member
YZH
Join Date: Apr 2017
Posts: 8
Rep Power: 9 |
Quote:
|
||
July 23, 2017, 21:59 |
I managed to make it worked
|
#15 |
New Member
YZH
Join Date: Apr 2017
Posts: 8
Rep Power: 9 |
||
August 3, 2017, 12:07 |
|
#16 |
New Member
Adam
Join Date: Jun 2017
Posts: 3
Rep Power: 9 |
Can you say how did u solve it?
|
|
August 21, 2017, 04:32 |
|
#17 |
New Member
YZH
Join Date: Apr 2017
Posts: 8
Rep Power: 9 |
Firstly, you should choose double precision in the Fluent Launcher.
Secondly, when you check the mesh after reading it, you will notice the WARNING in the console and do what the console told you which as the followed: "Please select /solve/initialize/repair-wall-distance using the text user interface to switch to the alternative algorithm." Thirdly, check the mesh again, it will okay without WARNING. |
|
January 4, 2018, 07:55 |
|
#18 |
New Member
Sakarya
Join Date: Jan 2018
Posts: 2
Rep Power: 0 |
Hi.
I have some problem like cp is invalid You must change discretization method as Coupled. Now The analysis is running. |
|
January 26, 2018, 12:32 |
need help about simulation solid oxide fuel cell
|
#19 |
New Member
sabrina
Join Date: Jan 2018
Posts: 18
Rep Power: 8 |
||
February 2, 2018, 17:21 |
|
#20 |
New Member
sabrina
Join Date: Jan 2018
Posts: 18
Rep Power: 8 |
please help me about this tutoriel i am begein work about this but i don't now how choose the boundry condition can you send it to me please urgent
|
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Seeking Macroscopic Particle Model in Fluent | bzhang7 | FLUENT | 3 | June 25, 2022 17:54 |
How to create a 3Ds Car Model importing to FLUENT? | spysunny | Main CFD Forum | 1 | January 10, 2012 23:40 |
Why is Fluent unable to deal with my model at the micron scale? | dixylo | FLUENT | 4 | December 8, 2011 23:39 |
Fluent 12 k-w SST turbulence model | DarrenC | FLUENT | 0 | December 13, 2009 08:33 |
Covert Star-CD model to FLUENT | Lam | Siemens | 6 | June 24, 2003 20:21 |