Can someone help me

EugenZ · July 18, 2013, 08:28

Im new here so im sorry if I did something wrong, and about my question I hope there is some little thing I did wrong and can change it easy.

I'm creating a mesh which ill use in fluentbut at the entrance and exits my mesh goes wild and i dont know how to fix it, can someone pls help me.

Im using ogrid and when i use my mesh is good in all places except entrance/exit.
skewnees is awful and it looks like this

[img=http://imageshack.us/scaled/thumb/28/3y1.png]

[img=http://imageshack.us/scaled/thumb/21/wjjj.png]

mb this should be moved to ANSYS Meshing & Geometry

diamondx · July 18, 2013, 11:19

it must a problem of associations, share project via dropbox, i have some free time...

Far · July 18, 2013, 11:54

Go to blocking > Association > update association and select first three options and apply

EugenZ · July 18, 2013, 13:48

Hi Far and ty guys for helping me.

https://www.dropbox.com/s/d8w8lnstn5x0tsh/preogrid.zip

this is what i have...and pictures you see are what i get after using ogrid.
I need agood mesh so i can use it in fluent, i need to learn how to do it.
All i know i've learned online so I'm not very good...tyvm

EugenZ · July 18, 2013, 15:03

If this can help someone, this one of my version after using ogrid, this mesh is also bad, around intersection of pipes...pls help with this :/

https://www.dropbox.com/s/qc05lk52uytb7v8/postogrid.zip

Far · July 18, 2013, 15:11

can you modify geometry at intersection zone?

EugenZ · July 18, 2013, 15:19

I cant, I did all my geometry with CATIA

Far · July 18, 2013, 15:25

This is good enough ?

EugenZ · July 18, 2013, 15:29

Yeah, this looks great, can you explain me how did you do it. I'm sorry if im too demanding, i really want to learn how to do it

Far · July 18, 2013, 15:32

I simply did not associate edges to those intersection curves. And Also moved vertices little bit.

EugenZ · July 18, 2013, 15:35

Well, you've helped me alot, hopefully this will be good enough mesh for me do some calculations in fluent.

THANK YOU AGAIN

diamondx · July 18, 2013, 15:37

try this ...https://dl.dropboxusercontent.com/u/...6/preogrid.zip

EugenZ · July 18, 2013, 15:46

Diamond, can you explain me how did you do that, yours is also awesome, how?

And thank you very much

Far · July 18, 2013, 16:17

Quote:

Originally Posted by diamondx

try this ...https://dl.dropboxusercontent.com/u/...6/preogrid.zip

Much better

diamondx · July 18, 2013, 16:26

there is nothing better than a video to explain this. but i can't install a mkv codec due to privileges. i will try to do that from home. meanwhile i did the necessary split. and merge some vertex together, and o-grid were the last... look at the tutorial "3d pipe junction" it is same blocking strategy, you can start from that one to understand

Far · July 18, 2013, 16:36

Ali why do you think that "3d pipe junction" uses the same approach? I dont see similar blocking approach in that tut!!!!

diamondx · July 18, 2013, 16:37

that geometry looks like half of the one we have here, no ? try to mirror it

Far · July 18, 2013, 16:41

No. I have more feeling of "pipe blade tutorial"

Hey did you like the idea of 3d laser scanner ?

diamondx · July 18, 2013, 16:42

Quote:

Hey did you like the idea of 3d laser scanner ?

You couldn't be more helpful than that... hehehe

Far · July 18, 2013, 16:50

Your idea is awesome. How did you get it?

July 18, 2013, 08:28	Can someone help me	#1
EugenZ New Member Eugen Zec Join Date: Jul 2013 Posts: 9 Rep Power: 12	Im new here so im sorry if I did something wrong, and about my question I hope there is some little thing I did wrong and can change it easy. I'm creating a mesh which ill use in fluentbut at the entrance and exits my mesh goes wild and i dont know how to fix it, can someone pls help me. Im using ogrid and when i use my mesh is good in all places except entrance/exit. skewnees is awful and it looks like this [img=http://imageshack.us/scaled/thumb/28/3y1.png] [img=http://imageshack.us/scaled/thumb/21/wjjj.png] mb this should be moved to ANSYS Meshing & Geometry

July 18, 2013, 11:19		#2
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 28	it must a problem of associations, share project via dropbox, i have some free time... __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

July 18, 2013, 15:37		#12
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 28	try this ...https://dl.dropboxusercontent.com/u/...6/preogrid.zip Far likes this. __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

July 18, 2013, 16:26		#15
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 28	there is nothing better than a video to explain this. but i can't install a mkv codec due to privileges. i will try to do that from home. meanwhile i did the necessary split. and merge some vertex together, and o-grid were the last... look at the tutorial "3d pipe junction" it is same blocking strategy, you can start from that one to understand __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

July 18, 2013, 16:37		#17
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 28	that geometry looks like half of the one we have here, no ? try to mirror it __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

July 18, 2013, 11:54		#3
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	Go to blocking > Association > update association and select first three options and apply

July 18, 2013, 13:48		#4
EugenZ New Member Eugen Zec Join Date: Jul 2013 Posts: 9 Rep Power: 12	Hi Far and ty guys for helping me. https://www.dropbox.com/s/d8w8lnstn5x0tsh/preogrid.zip this is what i have...and pictures you see are what i get after using ogrid. I need agood mesh so i can use it in fluent, i need to learn how to do it. All i know i've learned online so I'm not very good...tyvm

July 18, 2013, 15:03		#5
EugenZ New Member Eugen Zec Join Date: Jul 2013 Posts: 9 Rep Power: 12	If this can help someone, this one of my version after using ogrid, this mesh is also bad, around intersection of pipes...pls help with this :/ https://www.dropbox.com/s/qc05lk52uytb7v8/postogrid.zip

July 18, 2013, 15:11		#6
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	can you modify geometry at intersection zone?

July 18, 2013, 15:19		#7
EugenZ New Member Eugen Zec Join Date: Jul 2013 Posts: 9 Rep Power: 12	I cant, I did all my geometry with CATIA

July 18, 2013, 15:29		#9
EugenZ New Member Eugen Zec Join Date: Jul 2013 Posts: 9 Rep Power: 12	Yeah, this looks great, can you explain me how did you do it. I'm sorry if im too demanding, i really want to learn how to do it

July 18, 2013, 15:32		#10
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	I simply did not associate edges to those intersection curves. And Also moved vertices little bit.

July 18, 2013, 15:35		#11
EugenZ New Member Eugen Zec Join Date: Jul 2013 Posts: 9 Rep Power: 12	Well, you've helped me alot, hopefully this will be good enough mesh for me do some calculations in fluent. THANK YOU AGAIN

July 18, 2013, 15:46		#13
EugenZ New Member Eugen Zec Join Date: Jul 2013 Posts: 9 Rep Power: 12	Diamond, can you explain me how did you do that, yours is also awesome, how? And thank you very much

July 18, 2013, 16:36		#16
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	Ali why do you think that "3d pipe junction" uses the same approach? I dont see similar blocking approach in that tut!!!!

July 18, 2013, 16:41		#18
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	No. I have more feeling of "pipe blade tutorial" Hey did you like the idea of 3d laser scanner ?

July 18, 2013, 16:50		#20
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	Your idea is awesome. How did you get it?