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-   -   [ICEM] DESIGN and MESH WIND TURBINE (http://www.cfd-online.com/Forums/ansys-meshing/99580-design-mesh-wind-turbine.html)

 James Hetfield April 6, 2012 15:03

DESIGN and MESH WIND TURBINE

Hi
where can I learn this stuff?
1- I wanna generate an O-grid around a cylinder
2- a mesh around a wing?
3- designing and meshing around a wind turbine blade+ hub

why there is no tutorial???
I need them for my research but nobody and nothing help me

 Far April 6, 2012 16:09

 James Hetfield April 6, 2012 18:25

anyone know how to creat a 2-D O-Grid around a circle?

 Far April 7, 2012 00:13

 James Hetfield April 7, 2012 00:19

1 Attachment(s)
i want something like this
oh GOD, Im so pissed off by ANSYS
no good tutorials for it :(:(

 Far April 7, 2012 00:30

easily done in ICEM. wait few moments to get snapshots for this particular problem.

 Far April 7, 2012 02:11

Quote:
 2- a mesh around a wing?

 James Hetfield April 7, 2012 12:16

THANKS A LOT
FOR SURE you care about other people

I have some questions:

how did u created the initial surfaces and then deleted the smaller circular one?
and also, about the EDGE ASSOCIATION when you have created the 2-D PLANAR block? To what curves have you associated each edge?

 Far April 7, 2012 12:33

:)

1) create point 0,0,0

2) then two more points 0.5,0,0 and 0, 0.5, 0

3) another two points 10, 0, 0 and 0, -10, 0

4). Now create two circles for points in step 2 and 3 with centre from step 1 and angle 360

5). divide larger circle into four parts, for this you need two more points, so copy each points for larger circle by 90 deg

6). Go to surface panel and create surface for larger circle

7). Use build topology

8) delete newly created smaller circle.

 Far April 7, 2012 12:35

Quote:
 about the EDGE ASSOCIATION when you have created the 2-D PLANAR block? To what curves have you associated each edge?
First I made planner block and then associated all four edges (selected in one go) and associated them to all four curves. Same goes for smaller circle when you make the o-grid

Assign different material to inner most block (inside smaller circle)

 James Hetfield April 7, 2012 13:29

Quote:
 Originally Posted by Far (Post 353613) :) 1) create point 0,0,0 2) then two more points 0.5,0,0 and 0, 0.5, 0 3) another two points 10, 0, 0 and 0, -10, 0 4). Now create two circles for points in step 2 and 3 with centre from step 1 and angle 360 5). divide larger circle into four parts, for this you need two more points, so copy each points for larger circle by 90 deg 6). Go to surface panel and create surface for larger circle 7). Use build topology 8) delete newly created smaller circle.

I dont understand step7 and 8
where is Build Topology?

 James Hetfield April 7, 2012 13:32

I'll have trouble with this method because I want the left side of the larger circle to be INLET and the right side to be OUTLET
but with this method I cant assign different Boundary Conditions to them

 Far April 7, 2012 13:49

Quote:
 'll have trouble with this method because I want the left side of the larger circle to be INLET and the right side to be OUTLET but with this method I cant assign different Boundary Conditions to them
If you use the pressure far field then no problem other wise you have to modify the method, means two edges to two curves and other two edges to two other curves. got it?

 James Hetfield April 7, 2012 13:51

Quote:
 Originally Posted by Far (Post 353621) If you use the pressure far field then no problem other wise you have to modify the method, means two edges to two curves and other two edges to two other curves. got it?
yeah
thanks

 Far April 7, 2012 14:11

what about the wind turbine, should we start working on it with fictitious hub

 James Hetfield April 7, 2012 14:25

Quote:
 Originally Posted by Far (Post 353623) what about the wind turbine, should we start working on it with fictitious hub
I think whatever hub will work
we can start and then if i needed another hub I'd change it myself

 Far April 8, 2012 09:16

1 Attachment(s)
There were three problems present in cylinder case

1. Build topology and delete inner surface (Fig 1)

2. Association of inner circle and assigning different material to inner block (see attached files)

3. Mesh parameters (too many nodes were there)

http://img714.imageshack.us/img714/439/89380658.png

http://img403.imageshack.us/img403/6209/64788806.png

 James Hetfield April 8, 2012 18:13

thanks A LOT

 Far April 8, 2012 22:51

lets start working on wind turbine

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