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-   -   Wind turbine blade meshing (http://www.cfd-online.com/Forums/fluent/75073-wind-turbine-blade-meshing.html)

caohan April 15, 2010 12:08

Wind turbine blade meshing
 
4 Attachment(s)
Attachment 2965Hi all,

can somebody tell me the strategy of meshing the wind turbine blade in Gambit. I don't wanne use Tgrid/Hybird to mesh it automaticly. What I want to do is using Hex element to cooper the volume. But I don't know how to do that. I put my model and other people's models into the attachment to make that straightforward. sorry for my poor English

Han

-mAx- April 16, 2010 01:23

you have to split your domain into mappable subvolumes. Check your left picture, you can see the volume decomposition.
Gambit's tutorial 7 may be helpful (Modeling Flow in a Tank)

caohan April 16, 2010 06:48

Quote:

Originally Posted by -mAx- (Post 254873)
you have to split your domain into mappable subvolumes. Check your left picture, you can see the volume decomposition.
Gambit's tutorial 7 may be helpful (Modeling Flow in a Tank)

Hi MaX

Thanks for your tips, I would try the Gambit's tutorial 7 firstly. About the left picture, I still don't know how the sector face can be meshed by using mapped quad. Why when I mesh that face, Gambit only permit the way of pave.

Han

-mAx- April 16, 2010 07:04

Try to enforce the Quad -Tri Primitive schema

caohan April 16, 2010 07:16

Quote:

Originally Posted by -mAx- (Post 254922)
Try to enforce the Quad -Tri Primitive schema

Thank you very much

caohan April 17, 2010 09:40

1 Attachment(s)
Quote:

Originally Posted by -mAx- (Post 254922)
Try to enforce the Quad -Tri Primitive schema

Hi mAx

I split the domain with three parts, the volume which contain the blade still can not be meshed by using the way of copper. I think the problem comes from I use the volume to subtract the blade. The other two volumes can be mesh by using cooper successfully. I don't know how to do know, can you give me a little help?

Han

-mAx- April 18, 2010 04:12

you need more splits around the blade.
Meshing hexa isn't easy at all, and you can forget meshing your geometry with just few splits.
You need to isolate and decompose volumes around your blade
you can upload your .dbs file on a share server I will try to do something

caohan April 18, 2010 05:57

1 Attachment(s)
Quote:

Originally Posted by -mAx- (Post 255103)
you need more splits around the blade.
Meshing hexa isn't easy at all, and you can forget meshing your geometry with just few splits.
You need to isolate and decompose volumes around your blade
you can upload your .dbs file on a share server I will try to do something

Thank you very much, I have put my model into the attachment. Because I have no idea how to decompose the volume, so sorry to bother you.

Han

-mAx- April 19, 2010 02:26

1 Attachment(s)
you can isolate your profile like that:Attachment 3013
Then you will be able to mesh them with your won hexa paremeters (eg: refinement).

caohan April 19, 2010 06:28

Quote:

Originally Posted by -mAx- (Post 255176)
you can isolate your profile like that:Attachment 3013
Then you will be able to mesh them with your won hexa paremeters (eg: refinement).

Thank you mAx. I would try that block, by the way, is it meshed by gambit or ICEM, it looks like to mesh by ICEM, can you give me the link which the picture come from ?

Han

-mAx- April 19, 2010 07:11

it comes from your model (Gambit) ;)

caohan April 19, 2010 08:25

Quote:

Originally Posted by -mAx- (Post 255239)
it comes from your model (Gambit) ;)

Ok, Thank you very much.

saini.yashwant April 22, 2010 10:49

wind turbine analysis
 
Quote:

Originally Posted by -mAx- (Post 255239)
it comes from your model (Gambit) ;)

hi i am doing wind turbine analysis in fluent. will u please tell me how to give the boundary condition. what should i rotate wind rotor or air domain around the rotor. and how to find out the power developed by wind turbine. and cp too.
please help me i am in big trouble


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