[ICEM] ICEM Hexa_Airfoil with 2 sharp edges blocking?

Catthan · January 21, 2013, 11:09

Dear all,

I have been trying to mesh this airfoil in 2D after I did the youtube tutorial a couple of times.

This blade is from an automotive cooling fan.

Here's the profile

Here it is after the O-grid and splits

Then I thought I could just collapse both edges and blocks at the tips similar to the sharp trailing edge from the tutorial.

I did and I'm getting this..

From the last picture, the 2 airfoil sides merge to one after I collapse both blocks at the edges..
Am I missing something or is what I am trying to do fundamentally wrong?

I would appreciate some help..

Thanks,
T

Bharatt · January 21, 2013, 11:19

Hello catthan,

-basically you can go for any profile around the airfoil and split it to generate the mesh

what are your objectives?

Far · January 21, 2013, 11:24

You need quarter O-grid

See these threads:

http://www.cfd-online.com/Forums/ans...ic-trough.html

http://www.cfd-online.com/Forums/ans...w-winglet.html

http://www.cfd-online.com/Forums/ans...ler-blade.html

http://www.cfd-online.com/Forums/ans...tices-why.html

http://www.youtube.com/watch?v=92vScop7b8Q

Also try simple approach:
http://www.cfd-online.com/Forums/ans...ned-plate.html

diamondx · January 21, 2013, 11:47

your blocking is not good... look at thi thread :

http://www.cfd-online.com/Forums/ans...ic-trough.html

Catthan · January 21, 2013, 13:02

Thanks guys, quite a bit of reading there to do.

Will make a few attempts and post back.

Thanks a lot!

T

Catthan · January 24, 2013, 05:11

Ok guys, managed to mesh the airfoil successfully. The approach from the trough thread was the most applicable.

I looked at quarter o-grids and y-grids, however it wouldn't let me create them in 2D.

Well, probably with a few smart splits I could have made a smth similar but anyway,,

I'm sure I'll find this approach useful once I move on to 3D modelling.

Thanks to all!

Best,

Far · January 24, 2013, 05:26

Quote:

Originally Posted by Catthan

Ok guys, managed to mesh the airfoil successfully. The approach from the trough thread was the most applicable.

I looked at quarter o-grids and y-grids, however it wouldn't let me create them in 2D.

Well, probably with a few smart splits I could have made a smth similar but anyway,,

I'm sure I'll find this approach useful once I move on to 3D modelling.

Thanks to all!

Best,

Y-grids is used on 3d blocking, but you can use in 2D if you are smart enough.

However quarter ogrid can be used for 2d or 3d

January 21, 2013, 11:09	ICEM Hexa_Airfoil with 2 sharp edges blocking?	#1
Catthan Member Join Date: May 2010 Posts: 57 Rep Power: 15	Dear all, I have been trying to mesh this airfoil in 2D after I did the youtube tutorial a couple of times. This blade is from an automotive cooling fan. Here's the profile Here it is after the O-grid and splits Then I thought I could just collapse both edges and blocks at the tips similar to the sharp trailing edge from the tutorial. I did and I'm getting this.. From the last picture, the 2 airfoil sides merge to one after I collapse both blocks at the edges.. Am I missing something or is what I am trying to do fundamentally wrong? I would appreciate some help.. Thanks, T boobalan likes this.

January 21, 2013, 11:47		#4
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 28	your blocking is not good... look at thi thread : http://www.cfd-online.com/Forums/ans...ic-trough.html __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

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January 21, 2013, 11:19		#2
Bharatt Member Bharat Join Date: Jul 2011 Location: Delhi, India Posts: 49 Rep Power: 14	Hello catthan, -basically you can go for any profile around the airfoil and split it to generate the mesh what are your objectives?

January 21, 2013, 11:24		#3
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	You need quarter O-grid See these threads: http://www.cfd-online.com/Forums/ans...ic-trough.html http://www.cfd-online.com/Forums/ans...w-winglet.html http://www.cfd-online.com/Forums/ans...ler-blade.html http://www.cfd-online.com/Forums/ans...tices-why.html http://www.youtube.com/watch?v=92vScop7b8Q Also try simple approach: http://www.cfd-online.com/Forums/ans...ned-plate.html

January 21, 2013, 13:02		#5
Catthan Member Join Date: May 2010 Posts: 57 Rep Power: 15	Thanks guys, quite a bit of reading there to do. Will make a few attempts and post back. Thanks a lot! T

January 24, 2013, 05:11		#6
Catthan Member Join Date: May 2010 Posts: 57 Rep Power: 15	Ok guys, managed to mesh the airfoil successfully. The approach from the trough thread was the most applicable. I looked at quarter o-grids and y-grids, however it wouldn't let me create them in 2D. Well, probably with a few smart splits I could have made a smth similar but anyway,, I'm sure I'll find this approach useful once I move on to 3D modelling. Thanks to all! Best,