CFD Online Discussion Forums - [Other] making a sphere in openfoam!!! please help me

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making a sphere in openfoam!!! please help me

hi everybody,

I want to analyze the convection in a sphere. I create my meshes in gambit and use the fluent3DMeshToFoam to convert it to openfoam file, but the below error appear:

PHP Code:


		
			
Build  : 2.0.1-51f1de99a4bc
Exec   : fluent3DMeshToFoam 01.msh
Date   : Jul 24 2012
Time   : 18:37:42
Host   : mostafa-desktop
PID    : 3522
Case   : /home/mostafa/mantleconvection
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster
allowSystemOperations : Disallowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time



--> FOAM FATAL IO ERROR: 
cannot find file

file: /home/mostafa/mantleconvection/system/controlDict at line 0.

    From function regIOobject::readStream()
    in file db/regIOobject/regIOobjectRead.C at line 73.

FOAM exiting

what should I do?

Is here anyone can help me?!!!please.

OK, a new question: How can I model a sphere in OpenFoam?

Quote:

Originally Posted by adambarfi (Post 373253)

hi everybody,

I want to analyze the convection in a sphere. I create my meshes in gambit and use the fluent3DMeshToFoam to convert it to openfoam file, but the below error appear:

PHP Code:


		
			
Build  : 2.0.1-51f1de99a4bc

Exec   : fluent3DMeshToFoam 01.msh

Date   : Jul 24 2012

Time   : 18:37:42

Host   : mostafa-desktop

PID    : 3522

Case   : /home/mostafa/mantleconvection

nProcs : 1

sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).

fileModificationChecking : Monitoring run-time modified files using timeStampMaster

allowSystemOperations : Disallowing user-supplied system call operations



// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

Create time







--> FOAM FATAL IO ERROR: 

cannot find file



file: /home/mostafa/mantleconvection/system/controlDict at line 0.



    From function regIOobject::readStream()

    in file db/regIOobject/regIOobjectRead.C at line 73.



FOAM exiting

what should I do?

OF doesn't find the controlDict. Either you're in the wrong directory or there is no controlDict

Thank you Bernhard,

I create files and run it again, all things was alright except the blockMeshDict file. It remains without change. If I want to fill it, I don't know what is the number of vertexes and which vertexes are connected to each other!!!!! I have more than 200000 nodes.

What should I do? please.

Quote:

Originally Posted by adambarfi (Post 373520)

I don't understand your problem. If you import a fluent-mesh then you don't need a blockMeshDict. After the import you should have a valid mesh in constant/polyMesh

Quote:

Originally Posted by gschaider (Post 373524)

I don't understand your problem. If you import a fluent-mesh then you don't need a blockMeshDict. After the import you should have a valid mesh in constant/polyMesh

this file is initially empty, after converting and running blockMesh it still remain empty?!?!?
is it your mean that blockMeshDict isn't necessary?

Quote:

Originally Posted by adambarfi (Post 373525)

this file is initially empty, after converting and running blockMesh it still remain empty?!?!?
is it your mean that blockMeshDict isn't necessary?

Yep. blockMesh is only one way to get a mesh. A converter like fluentMeshToFoam is another. You only need one of those at a time

Quote:

Originally Posted by gschaider (Post 373573)

Yep. blockMesh is only one way to get a mesh. A converter like fluentMeshToFoam is another. You only need one of those at a time

Oh damn. so I was fooled for 2 dayes!!!!! yes, I done it.
but I have many other problems and questions that if I cannot solve them, I will come back again!

Thank you Bernhard so much.