[ICEM] Meshing of pipes with a nozzle

nethmech · December 19, 2013, 11:38

Hello

I need help to mesh this geometry. I have tried to make Hexamesh using ICEM CFD but I haven't been able to maintain the quality.

https://www.dropbox.com/sh/18thrf5u3tp9slx/rWf-SA-cFD

Please let me know how to mesh it.

Thanks

diamondx · December 20, 2013, 15:26

Somthing I tried before going back home. Not sure if it's correct, but you can get inspiration. I will get back on it if you need my help !!!

https://dl.dropboxusercontent.com/u/...86/Desktop.zip

Far · December 21, 2013, 04:13

http://www.cfd-online.com/Forums/poi...tion-pipe.html

http://cfd-consultancy.webs.com/tutorials

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

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

nethmech · December 21, 2013, 10:23

Thanks guys for the help.

I looked at the various files and tried to improve the mesh in my geometry. However I couldn't succeed entirely. The mesh now covers the profile/geometry however the nodes are not connected at several places.

Kindly give me feedback/advice on how to rectify the connectivity issues.

https://www.dropbox.com/sh/18thrf5u3tp9slx/rWf-SA-cFD

Far · December 21, 2013, 10:41

things is that , you have to add more ogrids and splits

as compared to previous threads

diamondx · December 21, 2013, 11:17

inside is complicated ,yeah not that easy !!!

nethmech · December 21, 2013, 17:07

Problem solved ..
Thanks everyone.

raghav · December 23, 2013, 08:08

with some time spent, attained .4 quality

Far · December 23, 2013, 09:13

Quote:

Originally Posted by nethmech

Problem solved ..
Thanks everyone.

Excellent work

raghav · December 23, 2013, 10:05

thanks

nethmech · December 23, 2013, 16:15

Raghav can you please send me your files.

raghav · December 24, 2013, 00:27

Hi,
I have attached .tin file and .blk separately because of size constraints.

Have split the blocks into fluid and solid.

I have created some surfces to make the geometry closed. It will not harm the physics. U can define them as internal or interface in fluent.

Have put all the Surfaces in 1 part and Curves in another separate part.
you can redefine them as u want it to be.

Hope this helps you.

Regards,
Raghav

nethmech · December 24, 2013, 08:36

Thanks Raghav.

raghav · December 24, 2013, 08:43

Anytime. :-)
Was it the way u expected? ? I mean the way I split the blocks for fliud and solid?

nethmech · December 24, 2013, 09:01

It was almost the way I expected. You have made concentric rings at the joint of the thin pipe and the cylindrical chamber.That's not required. Everything else in fine.

Check the files that I have attached.

I had problems in improving the mesh in ICEM CFD. However, from your files, I can see the way to improve the mesh in my files.

Thanks

raghav · December 24, 2013, 13:58

Hi Prabodh,

I appreciate your feedback.

Please go through the following points.

1. Reg. Concentric Rings(curves): I know they have trivial importance. But i created them to have associativity with edges and curves. I know surface association holds good but for safer side i consider curve association for the edges. And u can see that i have not divided those surfaces with these curves. Surface is single only. And i have used those rings or curves for association only

2. Reg. Cylindrical Chamber: I created the surface because i felt only that portion did not have a solid thick wall. so created that surface to include solid thick wall.
No problem. If u want fluid portion for this region, add those blocks in solid part to fluid part. And define that thin surface as Wall in fluent or in ICEM Boundary Conditions. you will get what u wanted.

3. And regarding the file you shared: Yes i can see where the problem was in your blocking strategy. Anyways, I hope this will improve your skills and strategies

Regards,
Raghav

December 20, 2013, 15:26		#2
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 29	Somthing I tried before going back home. Not sure if it's correct, but you can get inspiration. I will get back on it if you need my help !!! https://dl.dropboxusercontent.com/u/...86/Desktop.zip __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

December 21, 2013, 10:41		#5
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	things is that , you have to add more ogrids and splits as compared to previous threads nethmech likes this.

December 21, 2013, 11:17		#6
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 29	inside is complicated ,yeah not that easy !!! nethmech likes this. __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

December 21, 2013, 17:07		#7
nethmech New Member nethmech Join Date: Dec 2013 Location: Spain Posts: 8 Rep Power: 12	Problem solved .. Thanks everyone. Last edited by nethmech; December 22, 2013 at 08:30.

December 24, 2013, 13:58	Reg. Concentric Rings & cylindrical chamber	#16
raghav Member Raghav Join Date: Jul 2010 Location: India, Karnataka Posts: 47 Rep Power: 18	Hi Prabodh, I appreciate your feedback. Please go through the following points. 1. Reg. Concentric Rings(curves): I know they have trivial importance. But i created them to have associativity with edges and curves. I know surface association holds good but for safer side i consider curve association for the edges. And u can see that i have not divided those surfaces with these curves. Surface is single only. And i have used those rings or curves for association only 2. Reg. Cylindrical Chamber: I created the surface because i felt only that portion did not have a solid thick wall. so created that surface to include solid thick wall. No problem. If u want fluid portion for this region, add those blocks in solid part to fluid part. And define that thin surface as Wall in fluent or in ICEM Boundary Conditions. you will get what u wanted. 3. And regarding the file you shared: Yes i can see where the problem was in your blocking strategy. Anyways, I hope this will improve your skills and strategies Regards, Raghav nethmech likes this.

December 21, 2013, 04:13		#3
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	http://www.cfd-online.com/Forums/poi...tion-pipe.html http://cfd-consultancy.webs.com/tutorials http://www.cfd-online.com/Forums/ans...-icem-cfd.html http://www.cfd-online.com/Forums/ans...-junction.html

December 21, 2013, 10:23		#4
nethmech New Member nethmech Join Date: Dec 2013 Location: Spain Posts: 8 Rep Power: 12	Thanks guys for the help. I looked at the various files and tried to improve the mesh in my geometry. However I couldn't succeed entirely. The mesh now covers the profile/geometry however the nodes are not connected at several places. Kindly give me feedback/advice on how to rectify the connectivity issues. https://www.dropbox.com/sh/18thrf5u3tp9slx/rWf-SA-cFD

December 23, 2013, 10:05		#10
raghav Member Raghav Join Date: Jul 2010 Location: India, Karnataka Posts: 47 Rep Power: 18	thanks

December 23, 2013, 16:15		#11
nethmech New Member nethmech Join Date: Dec 2013 Location: Spain Posts: 8 Rep Power: 12	Raghav can you please send me your files.

December 24, 2013, 08:36		#13
nethmech New Member nethmech Join Date: Dec 2013 Location: Spain Posts: 8 Rep Power: 12	Thanks Raghav.

December 24, 2013, 08:43		#14
raghav Member Raghav Join Date: Jul 2010 Location: India, Karnataka Posts: 47 Rep Power: 18	Anytime. :-) Was it the way u expected? ? I mean the way I split the blocks for fliud and solid?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Meshing a nozzle	parvaz747	Mesh Generation & Pre-Processing	3	June 17, 2013 12:40
[ICEM] Help in meshing a 2D Nozzle?????	harman79	ANSYS Meshing & Geometry	4	November 22, 2009 23:45
compressible flow in a counterflow nozzle	d.vamsidhar	FLUENT	0	November 24, 2005 02:45
a hole in my structure after meshing a nozzle	Ho	CFX	7	October 3, 2005 09:33
UDF for dynamic meshing of 2D nozzle	Anant	FLUENT	0	July 29, 2004 10:18