[ICEM] Elliptical Ball Valve Meshing

alimrad110 · October 17, 2012, 12:36

Hi Guys,

I have to produce structured mesh for a ball valve with an elliptical output. I have no idea how to even approach this problem

. I would like to capture the chamfers and fillets using fine mesh. The ICEM files are attached here.

I have to simulate the ball in 100% open position, 60 degree open position and 30 degree open positions.

I would really appreciate your help.
contact me if you need more information about the geometry!

diamondx · October 17, 2012, 15:11

do you have access to the customer portal, you will find a bunch of tutorials on how to get started... we will gladly help when you will find difficulties somewhere. so come back to us after trying...

alimrad110 · October 17, 2012, 15:32

Thanks for your reply Ali,

I've done that a while ago. I can mesh simpler geometries fairly easily. I can mesh geometries with less curvature on them. I never meshed an assembly in ICEM though! My problem is where to start. Do I start with a block around the whole geometry and then split or I mesh the elliptical part first and then extend the blocks from the elliptical part. I have tried both but have failed with both! That's why I'm saying I have no idea where to start!

If you could let me how you would start to approach it I would much appreciate it!

Regards,
Ali

diamondx · October 17, 2012, 15:53

i took a look at your geometry. i suggest you extract the fluid domain from your assembly.
i don't think it's doable in icem , i suggest designmodeler...

diamondx · October 17, 2012, 15:57

a video on extracting fluid domain :
http://www.youtube.com/watch?v=Bb8Tsd9eGe4

cfd seeker · October 18, 2012, 12:39

An extended O-grid and then extrude will do the trick, am I right or wrong?

alimrad110 · October 22, 2012, 12:53

Hi Ali,

I have already tried using Ansys. It was that top notch mesh quality that I was looking for. Thats why I moved to ICEM. Thanks a lot for your time and effort though! Really Appreciate it !!!

alimrad110 · October 22, 2012, 13:00

Hi CFD Seeker,

I tried that once but couldn't get any further. So I started from the ellipse it self, created a block with an O-ring then extended it to the ball interior and then extended to ball interior and the piping. did the same to the other side as well. my premesh was not good at all !!! Maybe I had to associate surfaces as well as curves

let me know if you would do it differently !!!

Thanks,
Ali

sam03 · January 2, 2014, 00:45

Hello everyone.....
Can any one tell me how to simulate a ball valve in CFD. i just want to predict variation of flow from zero 100% opening......please can any one help

Far · January 2, 2014, 08:37

This question can be answered in better way in fluent forum. Any how you can put the inlet velocity and change mesh for each opening and give outlet condition.

Simon has told once that instead of remeshing create a sphere around valve and rotate it for each angle and connect main pipe with valve meshing through interface.

sam03 · January 5, 2014, 00:26

Dear Sijal Ahmed
my question is still remain unanswered how to re-mesh the opening each instant of time..............actually i have not attempted a problem of re-meshing the fluid domain if you could please help in this regard i will be obliged to you........

Thanks in advance

Far · January 5, 2014, 07:05

use dynamic meshing in fluent and start a new thread in fluent forum

maalan · April 24, 2014, 14:01

Hi there!! How woud you mesh the flow around a very thin 2-D ellipse with ICEM??

Thanks!"
Best!

October 17, 2012, 15:11		#2
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 28	do you have access to the customer portal, you will find a bunch of tutorials on how to get started... we will gladly help when you will find difficulties somewhere. so come back to us after trying... __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

October 17, 2012, 15:53		#4
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 28	i took a look at your geometry. i suggest you extract the fluid domain from your assembly. i don't think it's doable in icem , i suggest designmodeler... __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

October 17, 2012, 15:57		#5
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 28	a video on extracting fluid domain : http://www.youtube.com/watch?v=Bb8Tsd9eGe4 __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

January 2, 2014, 00:45	Ball valve simulation	#9
sam03 New Member wasim ahmed Join Date: Jan 2014 Posts: 2 Rep Power: 0	Hello everyone..... Can any one tell me how to simulate a ball valve in CFD. i just want to predict variation of flow from zero 100% opening......please can any one help

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October 17, 2012, 15:32		#3
alimrad110 New Member Ali Join Date: Jun 2012 Location: Canada Posts: 15 Rep Power: 13	Thanks for your reply Ali, I've done that a while ago. I can mesh simpler geometries fairly easily. I can mesh geometries with less curvature on them. I never meshed an assembly in ICEM though! My problem is where to start. Do I start with a block around the whole geometry and then split or I mesh the elliptical part first and then extend the blocks from the elliptical part. I have tried both but have failed with both! That's why I'm saying I have no idea where to start! If you could let me how you would start to approach it I would much appreciate it! Regards, Ali

October 18, 2012, 12:39		#6
cfd seeker Senior Member Join Date: Mar 2011 Location: Germany Posts: 552 Rep Power: 20	An extended O-grid and then extrude will do the trick, am I right or wrong?

October 22, 2012, 12:53		#7
alimrad110 New Member Ali Join Date: Jun 2012 Location: Canada Posts: 15 Rep Power: 13	Hi Ali, I have already tried using Ansys. It was that top notch mesh quality that I was looking for. Thats why I moved to ICEM. Thanks a lot for your time and effort though! Really Appreciate it !!!

October 22, 2012, 13:00		#8
alimrad110 New Member Ali Join Date: Jun 2012 Location: Canada Posts: 15 Rep Power: 13	Hi CFD Seeker, I tried that once but couldn't get any further. So I started from the ellipse it self, created a block with an O-ring then extended it to the ball interior and then extended to ball interior and the piping. did the same to the other side as well. my premesh was not good at all !!! Maybe I had to associate surfaces as well as curves let me know if you would do it differently !!! Thanks, Ali

January 2, 2014, 08:37		#10
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	This question can be answered in better way in fluent forum. Any how you can put the inlet velocity and change mesh for each opening and give outlet condition. Simon has told once that instead of remeshing create a sphere around valve and rotate it for each angle and connect main pipe with valve meshing through interface.

January 5, 2014, 00:26		#11
sam03 New Member wasim ahmed Join Date: Jan 2014 Posts: 2 Rep Power: 0	Dear Sijal Ahmed my question is still remain unanswered how to re-mesh the opening each instant of time..............actually i have not attempted a problem of re-meshing the fluid domain if you could please help in this regard i will be obliged to you........ Thanks in advance

January 5, 2014, 07:05		#12
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	use dynamic meshing in fluent and start a new thread in fluent forum

April 24, 2014, 14:01		#13
maalan Member Join Date: Jun 2011 Posts: 80 Rep Power: 14	Hi there!! How woud you mesh the flow around a very thin 2-D ellipse with ICEM?? Thanks!" Best!