[Thomas Jacob]

Please suggest a method to generate an aerofoil profile using random points in OpenFOAM.Kindly help me as I am a beginner in OpenFOAM.This is a part of my final year project.

[vainilreb]

Hi Thomas,

I don't know if this is the best way to do it, but there are several NACA generators, like this one. It creates the point coordinates for you. Then you could use gmsh to create the geometry. Make a small slice, if you want to do it in 2D. Then mesh it, save the mesh as an stl surface mesh and create a hexagonal mesh with snappyhexmesh.
Or simply generate a tetragonal mesh with gmsh.
I did this for a project at university two years ago and it worked out fine.

Best regards,

Robert

[linnemann]

Hi

you can try this pre-Alpha software http://sourceforge.net/projects/cmeshfoil/

It might do what you want but I dont know if its working properly as I havent tested.

[elvis]

Hi,

maybe sourcecode from http://sourceforge.net/projects/bladedesigner/ can be changed for your need as well. It was made to create mesh for OpenFoam at least and (python)scripting capabilaties are included.

Others looked at Salome http://www.salome-platform.org/forum/forum_10/367832063

alternative Salome =>pythonflu http://pythonflu.wikidot.com/hybridflu => OF

Or Blender http://openfoamwiki.net/index.php/Tut_andrew_blender

http://jak-o-shadows.users.sourcefor...blairfoil.html

Blender can be imported into engrid

[haakon]

You might want to have a look at the scripts posted here: https://www.hpc.ntnu.no/display/hpc/...l+Calculations which describe the meshing around a NACA 4-digit airfoil.

There are two scripts: one that make an STL-file that you can use in combination with snappyHexMesh, and one that makes a blockMeshDict-file for a C-mesh. They both have their advantages and disadvantages, and you should probably play around with both if you are not very familiar with OpenFOAM.

[immortality]

hi
how to download and compile cMeshFoam and bladeDesigner?

[linnemann]

Hi

Found this awesome page but I do not know who created it.
Please let the author cometh forth to get our appraisal.

Well basically it can create a blockMesh dict file for a blade geometry.

http://hvirvel.dk/airfoilmesher/

Try it out.

[MadsR]

Thanks for the kind words

I made it some years ago - it has its flaws I am sure, but seems to be used quite a bit. You are of course most welcome to send me feedback.

Mads

Originally Posted by linnemann

Hi

Found this awesome page but I do not know who created it.
Please let the author cometh forth to get our appraisal.

Well basically it can create a blockMesh dict file for a blade geometry.

http://hvirvel.dk/airfoilmesher/

Try it out.

[s.m]

Originally Posted by immortality

hi
how to download and compile cMeshFoam and bladeDesigner?

Ehsan , do you learn how should download and compile cMeshFoam and bladeDesigner?

please tell me if you found

[immortality]

I downloaded what has come in post #7 (airfoilmesher) Saideh.
it was interesting.you can email the creator if have any questions.

[s.m]

Originally Posted by immortality

I downloaded what has come in post #7 (airfoilmesher) Saideh.
it was interesting.you can email the creator if have any questions.

yes i saw that site yesterday , but i can't find how should i download it a last.

[immortality]

email him:madsreck(at)gmail.com
he replies friendly and quickly
ask him if he could give you the program.

[MadsR]

Just to clarify: there is nothing to download from http://hvirvel.dk/airfoilmesher/ . You just upload your airfoil x,y data and you get a blockMeshDict thrown back in your face

Mads

[s.m]

Originally Posted by MadsR

Just to clarify: there is nothing to download from http://hvirvel.dk/airfoilmesher/ . You just upload your airfoil x,y data and you get a blockMeshDict thrown back in your face

Mads

Thank you MadsR, but i can't access the site that you have been addressed

[MadsR]

Hi saeidehmohamadi,

then there is something wrong with your Internet connection...I just checked from a remote place and it works just fine.

Mads

[immortality]

Hello dear MadsR,
I want to have an airfoil with a channel into it(from bottom of attack region to the top of back of airfoil),can it be done with your code?
could you make some corrections in the code and upload in the page?
the channel will be a line,the user can assign thicknes,the start point and the angle of it and your program will make the mesh and return it backto the user.
could it be done without a too much efforts?
thanks.

[MadsR]

Ehsan, not really sure what you mean. Anyway I don't think I will customize the mesher much, I am thinking maybe implementing some more general functionality at some point, but not at the moment.

Mads

[zahid hussain]

hi plz tall me tha procedure creating airfoil on ansys cfd i have co-ordinates but i dont know how can i creat tha airfoil.....plzzz its argent

[yrganiri]

Hi everyone,

I am running tests on the RAE2822 transonic airfoil http://www.grc.nasa.gov/WWW/wind/val...af/raetaf.html and I already have a mesh which looks like in the picture (closeup and afar)

I used GMSH to generate the mesh and I would like to do something similar to what I have found in a book online http://www.pdas.com/refs/tm81198.pdf (pages 41 and 43) because I believe I will be getting better results.

Can you help me with that?

My Mesh closeup: gmsh-airfoil.jpg

My Mesh from afar: airfoil_from_afar.jpg

Type 1: airfoil_meshType1.jpg

Type 2: airfoil_meshType2.jpg

[hk318i]

I think you mean hexahedral mesh instead of tetrahedral. If that what you mean, you need to use the transfinite algorithm in GMSH. Check the structured mesh tutorials for GMSH.
Also it is possible to mesh it using blockMesh, check this tutorial
https://www.hpc.ntnu.no/display/hpc/...l+Calculations

Originally Posted by yrganiri

Hi everyone,

I am running tests on the RAE2822 transonic airfoil http://www.grc.nasa.gov/WWW/wind/val...af/raetaf.html and I already have a mesh which looks like in the picture (closeup and afar)

I used GMSH to generate the mesh and I would like to do something similar to what I have found in a book online http://www.pdas.com/refs/tm81198.pdf (pages 41 and 43) because I believe I will be getting better results.

Can you help me with that?

My Mesh closeup: Attachment 39293

My Mesh from afar: Attachment 39294

Type 1: Attachment 39295

Type 2: Attachment 39296