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-   -   [GAMBIT] gambit error limited!!! (https://www.cfd-online.com/Forums/ansys-meshing/88769-gambit-error-limited.html)

stage81 May 25, 2011 11:20

gambit error limited!!!
 
Hii,
I would like to know does the mesh of GAMBIT is limited? because when i meshed the domain I get the folloming error :

ERROR: Unable to write 32505856 bytes of data to descriptor 8.

-Instead -1 bytes were written

mesh of volume contains 8000000 highly skwed elements

Thanks for your help

-mAx- May 27, 2011 03:10

decompose your domain into subdomains (splits)

stage81 May 27, 2011 04:32

Can you show me how i can decompose my domain (brick 3D)?? thanks




Quote:

Originally Posted by -mAx- (Post 309450)
decompose your domain into subdomains (splits)


-mAx- May 27, 2011 04:58

show me your domain

stage81 May 27, 2011 05:08

My domain is a brick3D: [2cm, 1cm, 1cm], and i want to mesh this domain with an interval size of 0.005 along the x, y and z directions,



Quote:

Originally Posted by -mAx- (Post 309467)
show me your domain


-mAx- May 27, 2011 05:19

1 Attachment(s)
like that for instance
Attachment 7839

stage81 May 27, 2011 08:29

Can you sent me this in form ".msh" plaise



Quote:

Originally Posted by -mAx- (Post 309472)
like that for instance
Attachment 7839


-mAx- May 27, 2011 08:36

There is no mesh. It is only the volume decomposition.
I advice you to do it yourself, but I give you the journal file...
*********
volume create width 2 depth 1 height 1 brick
face cmove "face.3" multiple 1 offset 1 0 0
face cmove "face.1" multiple 1 offset 0 0 0.5
face cmove "face.2" multiple 1 offset 0 0.5 0
volume split "volume.1" faces "face.9" connected
volume split "volume.1" faces "face.8" connected keeptool
volume split "volume.2" faces "face.8" connected
volume split "volume.3" faces "face.7" connected keeptool
volume split "volume.1" faces "face.7" connected keeptool
volume split "volume.2" faces "face.7" connected keeptool
volume split "volume.4" faces "face.7" connected

stage81 May 27, 2011 08:53

Ok thanks, i'll test this journal file

Quote:

Originally Posted by -mAx- (Post 309505)
There is no mesh. It is only the volume decomposition.
I advice you to do it yourself, but I give you the journal file...
*********
volume create width 2 depth 1 height 1 brick
face cmove "face.3" multiple 1 offset 1 0 0
face cmove "face.1" multiple 1 offset 0 0 0.5
face cmove "face.2" multiple 1 offset 0 0.5 0
volume split "volume.1" faces "face.9" connected
volume split "volume.1" faces "face.8" connected keeptool
volume split "volume.2" faces "face.8" connected
volume split "volume.3" faces "face.7" connected keeptool
volume split "volume.1" faces "face.7" connected keeptool
volume split "volume.2" faces "face.7" connected keeptool
volume split "volume.4" faces "face.7" connected


PSYMN May 27, 2011 22:25

Also, are you 32 bit or 64 bit...

You are not going to get 32 million cells out of 32 bit Gambit...

(the 32 million was just a coincidence... nothing to do with 32 bit... I don't think you could get 15 million cells out of 32 bit gambit...)

stage81 May 30, 2011 03:48

I m 32 bit not 64

Quote:

Originally Posted by PSYMN (Post 309584)
Also, are you 32 bit or 64 bit...

You are not going to get 32 million cells out of 32 bit Gambit...

(the 32 million was just a coincidence... nothing to do with 32 bit... I don't think you could get 15 million cells out of 32 bit gambit...)


-mAx- June 1, 2011 01:45

I managed to get a 10 million cells mesh on 32 bit version.
No problem untill I wanted to export the mesh.
That's the problem..
I had to switch on linux64 bit partition with 8GB Ram. Then problem has been fixed

stage81 June 1, 2011 09:54

I also get the problem when I export the mesh .. Luckily for you :) I have note Linux 64! :confused: i have the 32bits (windows and linux):mad:

Thanks for information MAX


Quote:

Originally Posted by -mAx- (Post 310056)
I managed to get a 10 million cells mesh on 32 bit version.
No problem untill I wanted to export the mesh.
That's the problem..
I had to switch on linux64 bit partition with 8GB Ram. Then problem has been fixed


Rustam October 9, 2012 07:43

related problem
 
Hello,

I use 64 bit linux version of Gambit 2.3.16.
I manage to create a big mesh, say, more than 12-13 mln, but the error occurs when I try to convert it to .neu. And I use this format further with some in-house code.

After completing meshing it starts to write the Neutral file, for example:

...
"Writing 14046777nodes, 13600000 elements, 1 group and 0 bc sets to GAMBIT Neutral file test_new.neu.
ERROR: Error writing to file at line 38008498
/ Closing readfile ..." etc

In the next message I attach a .jou file. You can run it from the command line as follows
gambit -inp name.jou
although I use alias:
alias gambit='FLUENT_ARCH=lnx86 gambit -x11'

I would be happy to any help since I fill uncomfortable to switch to another meshing tool.

Thank you for help.

Rustam

Rustam October 9, 2012 07:44

It is not very clean though

Journal File for GAMBIT 2.3.16, Database 2.3.14, lnx86 SP2006033020
/ Identifier "default_id"
/ File opened for write Thu Oct 7 10:45:59 2010.
volume create width 1 depth 1 height 1 brick
undo begingroup
edge picklink "edge.4" "edge.12" "edge.1" "edge.9"
edge mesh "edge.9" "edge.1" "edge.12" "edge.4" successive ratio1 1 intervals \
100
undo endgroup
undo begingroup
edge picklink "edge.8" "edge.7" "edge.5" "edge.6"
edge mesh "edge.6" "edge.5" "edge.7" "edge.8" successive ratio1 1 intervals \
100
undo endgroup
undo begingroup
edge picklink "edge.3" "edge.2" "edge.10" "edge.11"
edge mesh "edge.11" "edge.10" "edge.2" "edge.3" successive ratio1 1 intervals \
80
undo endgroup
volume mesh "volume.1" map size 1
volume cmove "volume.1" multiple 16 unlinkmesh offset 0 0 1
solver select "Generic"
export gambit "test_new.neu"

-mAx- October 9, 2012 09:36

No problem for me to export your *.neu file
It generates a 2.3GB file

PS: I generates it from GUI >> File/Run Journal...

Rustam October 9, 2012 10:17

Thanks for spending your time, -mAx-.

Than i have another question. Where did you download your gambit? is it legal?:)
Because I use a cracked one. Which version do you have?

Thanks again
Rustam

-mAx- October 10, 2012 01:06

I have legal license (2.4.6)

nkme2007 October 10, 2012 05:50

Hello All,

I want to do analysis of heat transfer from water flowing through pipes submerged inside concrete. I am modelling in GAMBIT and wish to analyse it on Ansys FLUENT.

Can anybody help me out, how to model and simulate?

Does any tutorials exist?

stage81 October 10, 2012 12:17

Hi,

You cas see this exemple,

http://fr.scribd.com/doc/49980814/47...luent-Training


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