CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

chtMultiRegionSimpleFoam: strange error

Register Blogs Members List Search Today's Posts Mark Forums Read

Like Tree3Likes

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   October 23, 2013, 18:39
Default
  #21
Senior Member
 
Samuele Z
Join Date: Oct 2009
Location: Mozzate - Co - Italy
Posts: 520
Rep Power: 19
samiam1000 is on a distinguished road
Thank you so much Tobias.

This really helped.
samiam1000 is offline   Reply With Quote

Old   October 24, 2013, 09:04
Default
  #22
Senior Member
 
Samuele Z
Join Date: Oct 2009
Location: Mozzate - Co - Italy
Posts: 520
Rep Power: 19
samiam1000 is on a distinguished road
Hi Tobias,

can I ask you to share the fvSolution and fvSchemes files that you used for the solid regions. I think there's something wrong in mine, since I notice a strange behvior in domain2 region (look at the strange values of temperature) and the simulation is taking a lot of time to solve domain3.

Code:
Time = 1


Solving for fluid region fluid
DILUPBiCG:  Solving for Ux, Initial residual = 1, Final residual = 0.00545485, No Iterations 1
DILUPBiCG:  Solving for Uy, Initial residual = 1, Final residual = 0.0211023, No Iterations 1
DILUPBiCG:  Solving for Uz, Initial residual = 1, Final residual = 0.00876899, No Iterations 1
DILUPBiCG:  Solving for h, Initial residual = 1, Final residual = 0.0972692, No Iterations 11
Min/max T:270.103 305.567
DICPCG:  Solving for p_rgh, Initial residual = 0.61935, Final residual = 0.00590249, No Iterations 316
time step continuity errors : sum local = 0.0921942, global = 0.000144678, cumulative = 0.000144678
Min/max rho:1.13988 1.28954
--> FOAM Warning : 
    From function gaussConvectionScheme
    in file finiteVolume/convectionSchemes/gaussConvectionScheme/gaussConvectionScheme.H at line 123
    Reading "/home/zampini/Documenti/personali/Epta/PCMPacks/steady/system/fluid/fvSchemes.divSchemes.div(phi,epsilon)" at line 35
    Unbounded 'Gauss' div scheme used in steady-state solver, use 'bounded Gauss' to ensure boundedness.
    To remove this warning switch off 'boundedGauss' in "/home/zampini/OpenFOAM/OpenFOAM-2.2.0/etc/controlDict"
DILUPBiCG:  Solving for epsilon, Initial residual = 0.210492, Final residual = 0.00306992, No Iterations 1
DILUPBiCG:  Solving for k, Initial residual = 1, Final residual = 0.0467604, No Iterations 1

Solving for solid region domain1
DICPCG:  Solving for h, Initial residual = 1, Final residual = 0.0253284, No Iterations 2
Min/max T:min(T) [0 0 0 1 0 0 0] 297.999 max(T) [0 0 0 1 0 0 0] 298.003

Solving for solid region domain2
DICPCG:  Solving for h, Initial residual = 1, Final residual = 0.0693808, No Iterations 1
Min/max T:min(T) [0 0 0 1 0 0 0] 275.845 max(T) [0 0 0 1 0 0 0] 316.145

Solving for solid region domain3
Any idea?

Thanks a lot,
Samuele
samiam1000 is offline   Reply With Quote

Old   October 24, 2013, 12:28
Default
  #23
Super Moderator
 
Tobi's Avatar
 
Tobias Holzmann
Join Date: Oct 2010
Location: Bad Wörishofen
Posts: 2,711
Blog Entries: 6
Rep Power: 52
Tobi has a spectacular aura aboutTobi has a spectacular aura aboutTobi has a spectacular aura about
Send a message via ICQ to Tobi Send a message via Skype™ to Tobi
Quote:
Originally Posted by samiam1000 View Post
Hi Tobias,

can I ask you to share the fvSolution and fvSchemes files that you used for the solid regions. I think there's something wrong in mine, since I notice a strange behvior in domain2 region (look at the strange values of temperature) and the simulation is taking a lot of time to solve domain3.

Code:
Time = 1


Solving for fluid region fluid
DILUPBiCG:  Solving for Ux, Initial residual = 1, Final residual = 0.00545485, No Iterations 1
DILUPBiCG:  Solving for Uy, Initial residual = 1, Final residual = 0.0211023, No Iterations 1
DILUPBiCG:  Solving for Uz, Initial residual = 1, Final residual = 0.00876899, No Iterations 1
DILUPBiCG:  Solving for h, Initial residual = 1, Final residual = 0.0972692, No Iterations 11
Min/max T:270.103 305.567
DICPCG:  Solving for p_rgh, Initial residual = 0.61935, Final residual = 0.00590249, No Iterations 316
time step continuity errors : sum local = 0.0921942, global = 0.000144678, cumulative = 0.000144678
Min/max rho:1.13988 1.28954
--> FOAM Warning : 
    From function gaussConvectionScheme
    in file finiteVolume/convectionSchemes/gaussConvectionScheme/gaussConvectionScheme.H at line 123
    Reading "/home/zampini/Documenti/personali/Epta/PCMPacks/steady/system/fluid/fvSchemes.divSchemes.div(phi,epsilon)" at line 35
    Unbounded 'Gauss' div scheme used in steady-state solver, use 'bounded Gauss' to ensure boundedness.
    To remove this warning switch off 'boundedGauss' in "/home/zampini/OpenFOAM/OpenFOAM-2.2.0/etc/controlDict"
DILUPBiCG:  Solving for epsilon, Initial residual = 0.210492, Final residual = 0.00306992, No Iterations 1
DILUPBiCG:  Solving for k, Initial residual = 1, Final residual = 0.0467604, No Iterations 1

Solving for solid region domain1
DICPCG:  Solving for h, Initial residual = 1, Final residual = 0.0253284, No Iterations 2
Min/max T:min(T) [0 0 0 1 0 0 0] 297.999 max(T) [0 0 0 1 0 0 0] 298.003

Solving for solid region domain2
DICPCG:  Solving for h, Initial residual = 1, Final residual = 0.0693808, No Iterations 1
Min/max T:min(T) [0 0 0 1 0 0 0] 275.845 max(T) [0 0 0 1 0 0 0] 316.145

Solving for solid region domain3
Any idea?

Thanks a lot,
Samuele

Hi samuele,

didn't you notice the things I wrote you in skype. There is a link for the modified case there you find the fvSolutions.

1. your Warning belong to the none used "bound" scheme. Its a numerical trick I always use for stabilisation.

2. You Temperature of your fluid seems to be bad too.
3. Why you are not using only hexaeder meshes? It would be very nice.
4. For pressure equations you should / could use GAMG solvers

Regards
Tobi
Tobi is offline   Reply With Quote

Old   October 25, 2013, 03:55
Default
  #24
Senior Member
 
Samuele Z
Join Date: Oct 2009
Location: Mozzate - Co - Italy
Posts: 520
Rep Power: 19
samiam1000 is on a distinguished road
Dear Tobias,

thanks a lot for answering. Actually, I think that I have not received anything via Skype. Maybe I was online or something went wrong.

Let's try again.
Sorry.

Samuele
samiam1000 is offline   Reply With Quote

Old   August 29, 2014, 15:40
Default
  #25
Senior Member
 
Srivathsan N
Join Date: Jan 2013
Location: India
Posts: 101
Rep Power: 13
Sherlock_1812 is on a distinguished road
Hi Samuelle,

Can you tell me how you got rid of this error?

Code:
 --> FOAM FATAL IO ERROR: 
keyword type is undefined in dictionary ".T"

file: .T from line 66 to line 75.
I have tried changing the name of the case but it persists.
__________________
Regards,

Srivaths
Sherlock_1812 is offline   Reply With Quote

Old   August 29, 2014, 18:28
Default
  #26
Senior Member
 
Samuele Z
Join Date: Oct 2009
Location: Mozzate - Co - Italy
Posts: 520
Rep Power: 19
samiam1000 is on a distinguished road
Please,

attach the dictionary!
samiam1000 is offline   Reply With Quote

Old   December 29, 2015, 23:14
Default
  #27
Senior Member
 
nasir musa yakubu
Join Date: Mar 2014
Location: Birmingham
Posts: 109
Rep Power: 12
esujby is on a distinguished road
Hello samiam,

have you resolved ur issue?

best regards
esujby is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Compile calcMassFlowC aurore OpenFOAM Programming & Development 13 March 23, 2018 08:43
[OpenFOAM] Saving ParaFoam views and case sail ParaView 9 November 25, 2011 16:46
Version 15 on Mac OS X gschaider OpenFOAM Installation 113 December 2, 2009 11:23
How to get the max value of the whole field waynezw0618 OpenFOAM Running, Solving & CFD 4 June 17, 2008 06:07
user defined function cfduser CFX 0 April 29, 2006 11:58


All times are GMT -4. The time now is 20:43.