[ICEM] Blocking: H-mesh inside O-grid

sindre · January 20, 2014, 10:07

Hi all,

is it possible to create a H-mesh inside a O-grid in ICEM (ref figure below, trying to illustrate block setup)?

(I want to use this to mesh a rectangular cylinder (second figure).)

Best regards
Sindre

Far · January 20, 2014, 11:57

yes quit possible. just use blocking index and display the center rectangle and then split it as you like

sindre · January 20, 2014, 12:07

Thank you so much for responding, been working on this problem for a while. Can you please explain what you mean by using "blocking inside"? Do you mean that I can hide the surrounding blocks and then only split the center block?

Far · January 20, 2014, 13:01

sorry, i had to write index but typed inside. Yes just hide the blocking surrounding the rectangular block and proceed.

sindre · January 20, 2014, 13:53

That worked perfectly, as shown in the first figure

But this leaves me with another question:

Is it possible to create a Y-grid inside a O-grid (indicated by red lines on second figure)?

(((For information: I found the Index Control by right clicking the Blocking tab in the tree on the left side. User manual states that it is also possible to use the shortkey "i". )))

Far · January 20, 2014, 13:59

yes. That is done with ogrid. Just select two faces and you are done.

sindre · January 20, 2014, 14:03

I've been trying to do this in the same way, but it interrupts the surrounding blocks. Pictures displays the result.

Far · January 20, 2014, 14:28

first make yblock and afterwards oblock

sindre · January 20, 2014, 14:44

Do you know if it is possible to do it the other way around?

The reason why I'm asking is that I want to use the Y-block to create a mesh around a sharp corner, as shown in the first figure. That is, block 25, 27, 23 and 4 om the second figure.

Far · January 20, 2014, 14:56

just select two side face and you are done

Far · January 20, 2014, 16:13

sindre · January 23, 2014, 10:30

Thank you Sijal,

Your method worked out perfectly. The blocking index option was exactly what I've been searching for.

I've posted a couple of pictures below, showing the resulting mesh.

Sindre

Far · January 23, 2014, 10:42

It is unique blocking strategy. Great work

sindre · May 16, 2014, 08:38

After requests some more pictures are posted of block topology and generated mesh.

EDIT: This time of a square cylinder.

hoangtugugu · June 16, 2015, 08:24

could you show me how to create y-grid around the corners of the rectangle in ICEM CFD?

siddana2005 · June 30, 2015, 10:08

I would like to practice this model. if u dont mind can i have it?

epc1 · March 18, 2017, 17:07

Quote:

Originally Posted by Far

yes. That is done with ogrid. Just select two faces and you are done.

Hello, could you elaborate more on this? i'm lost in this step.

I'm also trying to create a y block buy can not understand this step.

Thanks

bluebase · March 20, 2017, 04:55

Hello Ernesto,

have a look at the attached picture.

In the ogrid menu, use "add faces" to select the red-marked faces/edges in the picture. The use "add blocks" to selct blocks which are marked in light red in the picture.

Then you should come up with a blocking sindre asked for.

With regards,
Sebastian

centerYblock.png

epc1 · March 21, 2017, 07:00

Quote:

Originally Posted by bluebase

Hello Ernesto,

have a look at the attached picture.

In the ogrid menu, use "add faces" to select the red-marked faces/edges in the picture. The use "add blocks" to selct blocks which are marked in light red in the picture.

Then you should come up with a blocking sindre asked for.

With regards,
Sebastian

Attachment 54759

Thanks a lot Sebastian!

January 20, 2014, 11:57		#2
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	yes quit possible. just use blocking index and display the center rectangle and then split it as you like sindre likes this. Last edited by Far; January 20, 2014 at 13:00.

March 20, 2017, 04:55		#18
bluebase Senior Member Sebastian Engel Join Date: Jun 2011 Location: Germany Posts: 567 Rep Power: 21	Hello Ernesto, have a look at the attached picture. In the ogrid menu, use "add faces" to select the red-marked faces/edges in the picture. The use "add blocks" to selct blocks which are marked in light red in the picture. Then you should come up with a blocking sindre asked for. With regards, Sebastian centerYblock.png aero_head likes this.

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January 20, 2014, 12:07		#3
sindre New Member Sindre Join Date: Oct 2013 Posts: 12 Rep Power: 13	Thank you so much for responding, been working on this problem for a while. Can you please explain what you mean by using "blocking inside"? Do you mean that I can hide the surrounding blocks and then only split the center block?

January 20, 2014, 13:01		#4
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	sorry, i had to write index but typed inside. Yes just hide the blocking surrounding the rectangular block and proceed.

January 20, 2014, 13:59		#6
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	yes. That is done with ogrid. Just select two faces and you are done.

January 20, 2014, 14:28		#8
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	first make yblock and afterwards oblock

January 20, 2014, 14:56		#10
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	just select two side face and you are done

January 20, 2014, 16:13		#11
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54

January 23, 2014, 10:42		#13
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	It is unique blocking strategy. Great work

June 16, 2015, 08:24		#15
hoangtugugu New Member Tom Join Date: Jan 2015 Posts: 3 Rep Power: 11	could you show me how to create y-grid around the corners of the rectangle in ICEM CFD?

June 30, 2015, 10:08		#16
siddana2005 New Member Siddana ravi Kumar Join Date: Apr 2015 Posts: 10 Rep Power: 11	I would like to practice this model. if u dont mind can i have it?