# [blockMesh] BlockMesh problem

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 April 26, 2004, 05:39 BlockMesh problem #1 New Member   Sathiah Pratap Join Date: Mar 2009 Posts: 6 Rep Power: 16 I have rectangular 2d channel with triangular bluff body. now the bluffbody I want to use prism. convertToMeters 1; vertices ( (0 0 0) (0.2836 0 0) (0.318 0 0) (1.0 0 0) (1.0 0.02 0) (0.318 0.02 0) (1.0 0.06 0) (0.318 0.06 0) (0.2836 0.06 0) (0.0 0.06 0) (0.0 0.02 0) (0.2836 0.02 0) (0 0 0.001) (0.2836 0 0.001) (0.318 0 0.001) (1.0 0 0.001) (1.0 0.02 0.001) (0.318 0.02 0.001) (1.0 0.06 0.001) (0.318 0.06 0.001) (0.2836 0.06 0.001) (0.0 0.06 0.001) (0.0 0.02 0.001) (0.2836 0.02 0.001) ); blocks ( hex (0 1 11 10 12 13 23 22 ) (20 30 1) simpleGrading (1 1 1) hex (2 3 4 5 14 15 16 17 ) (20 30 1) simpleGrading (1 1 1) hex (5 4 6 7 17 16 18 19 ) (60 20 1) simpleGrading (1 1 1) hex (11 5 7 8 23 17 19 20 ) (60 30 1) simpleGrading (1 1 1) hex (10 11 8 9 22 23 20 21 ) (60 30 1) simpleGrading (1 1 1) prism (1 5 11 13 17 23) (60 30 1) simpleGrading (1 1 1) ); edges ( ); patches ( patch inlet ( (10 9 21 22 ) (0 10 22 12 ) ) patch outlet ( (4 3 15 16 ) (6 4 16 18 ) ) wall fixedWalls ( (6 7 19 18) (7 8 20 19) (8 9 21 20) ) symmetryPlane down ( (0 1 13 12) (2 3 15 14) ) wall bluffbody ( (5 1 13 17) (2 5 17 14) ) empty frontAndBack ( (0 1 11 10 ) (12 13 22 23 ) (2 3 4 5 ) (14 15 16 17 ) (5 4 6 7 ) (17 16 18 19 ) (11 5 7 8 ) (23 17 19 20 ) (10 11 8 9 ) (22 23 20 21 ) //prism (1 5 11 13 17 23) ) ); I get the error of segementation fault. May be I am doing something silly please correct me. Pratap

 April 26, 2004, 06:39 Am I correct when I say that #2 Niklas Nordin (Niklas) Guest   Posts: n/a Am I correct when I say that you are trying to mesh the 'bluffbody'? Why?

 April 26, 2004, 06:50 Nope I am not meshing the blu #3 New Member   Sathiah Pratap Join Date: Mar 2009 Posts: 6 Rep Power: 16 Nope I am not meshing the bluffbody. Pratap

 April 26, 2004, 09:25 You are trying to use a "pris #4 Anonymous Guest   Posts: n/a You are trying to use a "prism" as a block shape. All block must (nominally) be hex - use double vertices in hex definition instead. Hrv

 December 29, 2008, 01:40 /*---------------------------- #5 New Member   VIJAYAKUMAR R Join Date: Mar 2009 Location: BANGALORE, KARNATAKA, INDIA Posts: 20 Rep Power: 16 /*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \ / O peration | Version: 1.4.1 | | \ / A nd | Web: http://www.openfoam.org | | \/ M anipulation | | \*---------------------------------------------------------------------------*/ // FoamX Case Dictionary. FoamFile { version 2.0; format ascii; root "/home/openfoam14/OpenFOAM/openfoam14-1.4.1/run/opvijay"; case "23combustion"; instance "constant/polyMesh"; local ""; class dictionary; object blockMeshDict; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // arguments "/home/openfoam14/OpenFOAM/openfoam14-1.4.1/run/opvijay/23combustion" off; convertToMeters 1; vertices ( (0 0 0) (0 22.5 0) (180 0 0) (180 22.5 0) (0 0.5 0) (14 0 0) (14 0.5 0) (0 0 1) (0 22.5 1) (180 0 1) (180 22.5 1) (0 0.5 1) (14 0 1) (14 0.5 1) ); blocks ( hex (0 2 3 1 7 9 10 8) (180 22 1) simpleGrading (1 1 1) hex (0 5 6 4 7 12 13 11) (14 1 1) simpleGrading (1 1 1) ); edges ( ); patches ( symmetryPlane left ( (0 7 8 1) (0 7 11 4) ) symmetryPlane right ( (2 3 10 9) (5 6 13 12) ) symmetryPlane top ( (1 8 10 3) (4 11 13 6) ) symmetryPlane bottom ( (0 2 9 7) (0 5 12 7) ) empty frontandback ( (7 8 10 9) (0 1 3 2) (4 11 13 12) (0 4 6 5) ) ); mergePatchPairs ( ); WHILE EXECTING BOUNDARY WAS NOT CREATING.. SOME WHERE I AM GOING WRONG PLEASE CORRECT IT

 December 29, 2008, 01:41 /*---------------------------- #6 New Member   VIJAYAKUMAR R Join Date: Mar 2009 Location: BANGALORE, KARNATAKA, INDIA Posts: 20 Rep Power: 16 /*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \ / O peration | Version: 1.4.1 | | \ / A nd | Web: http://www.openfoam.org | | \/ M anipulation | | \*---------------------------------------------------------------------------*/ // FoamX Case Dictionary. FoamFile { version 2.0; format ascii; root "/home/openfoam14/OpenFOAM/openfoam14-1.4.1/run/opvijay"; case "23combustion"; instance "constant/polyMesh"; local ""; class dictionary; object blockMeshDict; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // arguments "/home/openfoam14/OpenFOAM/openfoam14-1.4.1/run/opvijay/23combustion" off; convertToMeters 1; vertices ( (0 0 0) (0 22.5 0) (180 0 0) (180 22.5 0) (0 0.5 0) (14 0 0) (14 0.5 0) (0 0 1) (0 22.5 1) (180 0 1) (180 22.5 1) (0 0.5 1) (14 0 1) (14 0.5 1) ); blocks ( hex (0 2 3 1 7 9 10 8) (180 22 1) simpleGrading (1 1 1) hex (0 5 6 4 7 12 13 11) (14 1 1) simpleGrading (1 1 1) ); edges ( ); patches ( symmetryPlane left ( (0 7 8 1) (0 7 11 4) ) symmetryPlane right ( (2 3 10 9) (5 6 13 12) ) symmetryPlane top ( (1 8 10 3) (4 11 13 6) ) symmetryPlane bottom ( (0 2 9 7) (0 5 12 7) ) empty frontandback ( (7 8 10 9) (0 1 3 2) (4 11 13 12) (0 4 6 5) ) ); mergePatchPairs ( ); SOME ERROR WAS COMING LIKE NO MESH IS DEFINED, FOAM ABROPTING... PLEASE CORRECT IT

 December 29, 2008, 02:18 Here is your problem empty #7 Member   Velan Join Date: Mar 2009 Location: India Posts: 50 Rep Power: 16 Here is your problem empty frontandback ( (7 8 10 9) (0 1 3 2) (4 11 13 12) (0 4 6 5) ) ); Change the value of 4 into 7 in the thirdface empty frontandback ( (7 8 10 9) (0 1 3 2) (7 11 13 12) (0 4 6 5) ) );

 December 29, 2008, 03:50 could u send me a naca0012 air #8 Senior Member   NAVEEN.K.M Join Date: Mar 2009 Location: Bangalore, Karnataka, india Posts: 114 Rep Power: 16 could u send me a naca0012 airfoil vertices to work in openfoam...

 December 29, 2008, 04:00 hello sir could u pl #9 Senior Member   NAVEEN.K.M Join Date: Mar 2009 Location: Bangalore, Karnataka, india Posts: 114 Rep Power: 16 hello sir could u please help me how to solve naca4421 airfoil case in openfoam 1.4.1.....

 December 29, 2008, 04:04 hi every one #10 Senior Member   NAVEEN.K.M Join Date: Mar 2009 Location: Bangalore, Karnataka, india Posts: 114 Rep Power: 16 hi every one can u gsend me da naca 0012 vertices in openfoam ...

 December 29, 2008, 04:21 hi everybody i am not #11 Senior Member   NAVEEN.K.M Join Date: Mar 2009 Location: Bangalore, Karnataka, india Posts: 114 Rep Power: 16 hi everybody i am not able to solve the naca 4421 airfoil case wit aoa=2....could u send me a naca 4421 tutorial to solve in openFOAM.....

 January 2, 2009, 03:03 HI EVERYONE MY SELF NAVEE #15 Senior Member   NAVEEN.K.M Join Date: Mar 2009 Location: Bangalore, Karnataka, india Posts: 114 Rep Power: 16 HI EVERYONE MY SELF NAVEEN i am new to openfoam cfd software i am not able to solve the naca0012 airfoil case in openfoam ..can u please help me regarding this and if u r having any tutorial based on openfoam please send me...

 January 6, 2009, 00:25 hi every body ca #16 Senior Member   NAVEEN.K.M Join Date: Mar 2009 Location: Bangalore, Karnataka, india Posts: 114 Rep Power: 16 hi every body can u send me a naca 0012 tutorial to solve in openFOAM...

 January 7, 2009, 00:44 vertices ( (0 0 #17 New Member   VIJAYAKUMAR R Join Date: Mar 2009 Location: BANGALORE, KARNATAKA, INDIA Posts: 20 Rep Power: 16 vertices ( (0 0 0) (0 22.5 0) (180 0 0) (180 22.5 0) (0 0.5 0) (14 0 0) (14 0.5 0) (0 0 1) (0 22.5 1) (180 0 1) (180 22.5 1) (0 0.5 1) (14 0 1) (14 0.5 1) ); blocks ( hex (0 2 3 1 7 9 10 8) (180 23 1) simpleGrading (1 1 1) hex (0 5 6 4 7 12 13 11) (14 1 1) simpleGrading (1 1 1) ); edges ( ); patches ( patch inlet ( (0 7 8 1) (0 7 11 4) ) patch outlet ( (2 3 10 9) (5 6 13 12) ) wall topwall ( (1 8 10 3) (4 11 13 6) ) wall bottomwall ( (0 2 9 7) (0 5 12 7) ) empty frontandback ( (7 8 10 9) (0 1 3 2) (7 11 13 12) (0 4 6 5) ) ); mergePatchPairs ( ); this problem block mesh is execting..... but i need two seperate inputs as (0 7 11 4) and (4 11 8 1) when i give this inputs in patches block mesh executing is showing error.. please can u correct it

 January 7, 2009, 01:20 vertices ( (0 0 #18 New Member   VIJAYAKUMAR R Join Date: Mar 2009 Location: BANGALORE, KARNATAKA, INDIA Posts: 20 Rep Power: 16 vertices ( (0 0 0) (0 22.5 0) (180 0 0) (180 22.5 0) (0 0.5 0) (14 0 0) (14 0.5 0) (0 0 1) (0 22.5 1) (180 0 1) (180 22.5 1) (0 0.5 1) (14 0 1) (14 0.5 1) ); blocks ( hex (0 2 3 1 7 9 10 8) (180 23 1) simpleGrading (1 1 1) hex (0 5 6 4 7 12 13 11) (14 1 1) simpleGrading (1 1 1) ); edges ( ); patches ( patch inlet ( (0 7 8 1) (0 7 11 4) ) patch outlet ( (2 3 10 9) (5 6 13 12) ) wall topwall ( (1 8 10 3) (4 11 13 6) ) wall bottomwall ( (0 2 9 7) (0 5 12 7) ) empty frontandback ( (7 8 10 9) (0 1 3 2) (7 11 13 12) (0 4 6 5) ) ); mergePatchPairs ( ); thanks for VELAN SIR for correcting, again one problem occcured... this problem block mesh is execting..... but i need two seperate inputs as (0 7 11 4) and (4 11 8 1) when i give this inputs in patches block mesh executing is showing error.. please can u correct it

 January 7, 2009, 10:49 Hallo, the case you are try #19 Senior Member   Wolfgang Heydlauff Join Date: Mar 2009 Location: Germany Posts: 136 Rep Power: 20 Hallo, the case you are trying to solve won't work because the blocks intersect each other. I see, that you have a big block with a little block inside. you cannot create the big block an the the little one inside. you will have to split the big block into three blocks. also add the following vertices at the end of your list (14 22.5 0) //Vertex 14 (14 22.5 1) //Vertex 15 (18 0.5 0) //Vertex 16 (18 0.5 1) //Vertex 17 then you'll have all in all 4 blocks (0 5 6 4 7 12 13 11)(14 1 1) (5 2 16 6 12 9 17 13)(166 1 1) (4 6 14 1 11 13 15 8)(166 44 1) (6 16 3 14 13 17 10 15)(14 44 1) Not sure if this is right, but the nodes of the blocks have to match the nodes of the neighbour block. ....and hey, VIJAYAKUMAR R, not sure what you try to simulate with this. maybe you can explain al little more detailed next time. greats

 January 9, 2009, 04:04 HI EVERYBODY I AM F #20 Senior Member   NAVEEN.K.M Join Date: Mar 2009 Location: Bangalore, Karnataka, india Posts: 114 Rep Power: 16 HI EVERYBODY I AM FACING DIFFICULT TO INSTALL OPENFOAM 1.4.1 VERSION IN MY SYSTEM.....CAN U PLEASE SEND ME THE PROCEDURE OF INSTALLING IT.... PLEASE DO THE NEEDFUL...

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