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FJSJ February 25, 2013 08:47

Blocking Strategy
3 Attachment(s)

I'm trying to mesh a wind turbine blade twisted. But first, I'm reducing the problem. Now I'm trying to mesh a wing taper ratio in this domain. However, the wing doesnt intersect with the side surfaces of the domain. What would be the correct strategy of blocking?

Far February 28, 2013 13:09

FJSJ March 4, 2013 04:23

Thank Far,

But is not the same case. This wing has a taper ratio so.. I think is not exactly the same blocking strategy. In addition, in my case all wing is inside flow domain and there arent intersection with wall.

Far March 4, 2013 05:58

If you look carefully at the thread, you will find that one side is connected to surface (symmetry) while the other is not. In your case you have to apply open-side approach on both siedes. Moreoever the blocking method for tapered or simple wing is exactly the same.

So you can still follow that thread with full confidence. Do come back and ask the some specific questions if you get the problem.

FJSJ March 5, 2013 07:31

Thank Far. You were right. I did this example. A few days ago I started to try and make the strategy of the actual geometry of the turbine blade and the flow domain. I'm getting things but maybe not the best quality possible. Now I'll open a thread to discuss some doubts about the strategy block in an area with torsion, taper ratio ...
Thanks again.

Far March 5, 2013 08:13

you can continue here. No problem

FJSJ March 5, 2013 12:28

3 Attachment(s)
ive not read your answer before open a new thread. In any case, I paste the same message here.

I write this post to see if any of you could advise me on the blocking strategy is appropriate. I'm trying to mesh this domain (image1,2)

Attachment 19594 Attachment 19595

Before I do this, I want to split it the whole domain into 3 sections and then mesh them separately. Now I show the first of it (image 3).

Attachment 19596

To be clear what I do in this case attached this video.

I am delighted to tell me what I'm doing wrong or if the strategy is not adequate. I make an o-grid but then if I want to have a sharp trailing edge I have to collapse blocks and I think that worsens the cylinder .. I do not know what would be the optimal strategy.

Thank you in advance

FJSJ March 14, 2013 11:36

Hi guys,

Ive been reading about my project in other threads, for example:

At the same time, when I read this thread I saw the Ralen approach about tip blade:

I downloaded the .tin file and Ive practiced trying to follow the nine steps. Ive asked Bollonga too, because he dealed with the problem before than me. I achieved to do a good mesh. But.. the flow domain in Ralen approach is simpler than than mine, it good idea to make the same approach in my case, I mean, with a semisphere like flow domain near to tip? Anyway, it wouldnt be exactly the same because my blade tip is a little different.

Thank you in advance!

FJSJ March 20, 2013 08:19

5 Attachment(s)
Hi all,

Ive been some days off. Now, Im trying to do Ralen approach in the domain I said the last week. First of all, I did the same approach, I mean, without an o-grid in the bottom side, but I got bad elements in bottom side. Secondly, Ive tried the same approach but with an o-grid in bottom side and then Ive tried to do something similar with internal block. Someone knows how to do this with a better aproximations?

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