CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > ANSYS Meshing & Geometry

[ICEM] ICEM Hexa meshing tutorial - Wing with sharp trailing edge

Register Blogs Members List Search Today's Posts Mark Forums Read

Like Tree1Likes

Reply
 
LinkBack Thread Tools Display Modes
Old   May 18, 2012, 12:19
Thumbs up ICEM Hexa meshing tutorial - Wing with sharp trailing edge
  #1
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,971
Blog Entries: 6
Rep Power: 39
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
Please refer to thread Structured Hexa Mesh on Wing. I have made video recording for method 4.
For method 2, method 2 mod and method 3 youtube tutorials are coming soon.


Link for video tutorial on Hexa meshing of wings with sharp trainling edge in ICEM CFD is http://www.youtube.com/watch?v=mgjRT...ature=youtu.be
Far is offline   Reply With Quote

Old   May 18, 2012, 14:17
Default
  #2
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,971
Blog Entries: 6
Rep Power: 39
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
Youtube link : http://www.youtube.com/watch?v=mgjRT...ature=youtu.be
Far is offline   Reply With Quote

Old   May 19, 2012, 19:18
Default
  #3
Senior Member
 
PSYMN's Avatar
 
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,662
Blog Entries: 1
Rep Power: 36
PSYMN has a spectacular aura aboutPSYMN has a spectacular aura about
Sure, I will be talking to marketing about these videos next week... We will figure out some way to help more users see them...

As for tips, there are lots of little things I could suggest... For instance the first minute could be done with a single click of auto-associate.

We can talk more about those sorts of things later.
__________________
-----------------------------------------
Please help guide development at ANSYS by filling in these surveys

Public ANSYS ICEM CFD Users Survey

This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)...

CFD Online Users Survey
PSYMN is offline   Reply With Quote

Old   May 19, 2012, 19:18
Default
  #4
Senior Member
 
PSYMN's Avatar
 
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,662
Blog Entries: 1
Rep Power: 36
PSYMN has a spectacular aura aboutPSYMN has a spectacular aura about
At least 10 characters
Far likes this.
__________________
-----------------------------------------
Please help guide development at ANSYS by filling in these surveys

Public ANSYS ICEM CFD Users Survey

This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)...

CFD Online Users Survey

Last edited by PSYMN; May 22, 2012 at 09:12. Reason: Didn't intend to share that with the world at large...
PSYMN is offline   Reply With Quote

Old   May 20, 2012, 01:31
Default
  #5
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,971
Blog Entries: 6
Rep Power: 39
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
Hi Simon

Thank-you for encouragement.

I will learn more working with you, still I am lacking in finishing touches. Moreover I have turned on the full screen in Camtasia Studio, but I don't why I am not getting full tool-bar. This might be due to HD video conversion at latter stage.

I try to improve the things as you suggest me, like where to slow down, where to speedup, time saving in auto-association. Many things to learn .

I am also planning to make tutorial on the mesh refinement tool, you have just made available. Also some tutorials on scripting language.

I have in mind to work on more complex shapes, like wind-turbines, full aircraft (with wings, fins, straks etc), turbo-machinery (axial, radial, mixed, volute etc) and submarines. mutizone and hybrid meshing techniques are also on the to-do list.
Far is offline   Reply With Quote

Old   May 27, 2012, 09:36
Default
  #6
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,971
Blog Entries: 6
Rep Power: 39
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
Quote:
Originally Posted by PSYMN View Post
At least 10 characters
Quote:
Reason: Didn't intend to share that with the world at large...

hehehe. Sending you today. Is there any chance?
Far is offline   Reply With Quote

Old   June 24, 2012, 14:34
Default Propeller blade Hexa meshing using ICEM CFD
  #7
Member
 
venkatesh
Join Date: May 2012
Posts: 93
Rep Power: 5
venkat_aero2007 is on a distinguished road
Hi,

Firstly thanks to Far, for posting a nice video on hexa meshing for wing. I am trying to mesh Propeller blade using ICEM CFD. I have done an unstructured mesh for propeller blade (Figure 1). But the mesh quality went down after creating prism layer . So I tried to do structured mesh (Figure 2). Propeller blade has a sharp trailing edge. My Propeller is backward curved with cambered airfoil and it has totally 11 blade with a periodic angle of 32.727 degree. Initially I created a domain (Figure2) and made the vertex as periodic. I followed the same step as far explained in his video of hexa meshing for wing. I made two horizontal (at pressure and suction side)and vertical split ( at leading and trailing edge). then I associated edge to curve of the blade and created O-block around the blade( Figure 3 & 4). then made a split in the trailing edge O-grid and associated the vertex to trailing edge point. But the quality of mesh at the trailing edge and the tip of the propeller was bad. you can see the bad elements in figure 5. I maintained all the block and O-grid within the tip of the propeller (Figure 4).

I thought bad quality elements will disappear if i extend the block up to to the top surface of the domain (figure6). but the number of bad quality elements increased to a huge number (figure 7). I also tried to collapse the trailing edge block, but that has not worked. still i found bad quality elements in the trailing edge and tip of the propeller blade.

Please, some one help me to solve this problem. Should I want to follow a different strategy? Here is the tin and blk file of propeller blade.

http://jyraphe.isae.fr/file.php?h=R8...009fb057047715
http://jyraphe.isae.fr/file.php?h=R1...99c234dece8e65

Please, Some advice to improve the quality of the mesh.

I will attach the Figure 6 & 7 in the next post.






.
Attached Images
File Type: jpg contra.jpg (96.1 KB, 167 views)
File Type: jpg Domain.jpg (25.3 KB, 93 views)
File Type: jpg blade with mesh.jpg (95.1 KB, 139 views)
File Type: jpg block statergy.jpg (89.7 KB, 94 views)
File Type: jpg bad elements.jpg (44.4 KB, 100 views)
venkat_aero2007 is offline   Reply With Quote

Old   June 24, 2012, 14:39
Default
  #8
Member
 
venkatesh
Join Date: May 2012
Posts: 93
Rep Power: 5
venkat_aero2007 is on a distinguished road
Figure 6 and 7
Attached Images
File Type: jpg block_ extension to top.jpg (40.4 KB, 49 views)
File Type: jpg bad_elements_extension.jpg (46.9 KB, 42 views)
venkat_aero2007 is offline   Reply With Quote

Old   June 24, 2012, 14:47
Default
  #9
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,971
Blog Entries: 6
Rep Power: 39
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
Are you going use periodic boundary?
Far is offline   Reply With Quote

Old   June 24, 2012, 14:54
Default
  #10
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,971
Blog Entries: 6
Rep Power: 39
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
Use topology like this Meshing of a parabolic trough
Far is offline   Reply With Quote

Old   June 24, 2012, 15:06
Default
  #11
Member
 
venkatesh
Join Date: May 2012
Posts: 93
Rep Power: 5
venkat_aero2007 is on a distinguished road
Yes I am going to use periodic boundary.
venkat_aero2007 is offline   Reply With Quote

Old   June 24, 2012, 21:12
Default
  #12
Member
 
venkatesh
Join Date: May 2012
Posts: 93
Rep Power: 5
venkat_aero2007 is on a distinguished road
Quote:
Originally Posted by Far View Post
Use topology like this Meshing of a parabolic trough
Hi Far,

I had a look on Hexa trough meshing post. But in my case blade is attached to the hub and i also use periodic boundary. with little knowledge in ICEM CFD I dont know how to capture the blade with quarter O-grid. Could you please explain me a bit more.
venkat_aero2007 is offline   Reply With Quote

Old   July 14, 2012, 05:59
Default Quarter O-grid
  #13
Member
 
venkatesh
Join Date: May 2012
Posts: 93
Rep Power: 5
venkat_aero2007 is on a distinguished road
Hi,

I tried O block topology to mesh my geometry but the quality was not good. So I was recommended to try Quarter O-grid. The periodic angle is 32.72727 (11 blades). The flow is along X direction. I drawn Quarter O-grid using four faces. I have attached few pic, Figure1 represents the geomentry, Figure2 - initial block round the peopeller domain. Figure3- quater O-grid by using four faces (inlet face, outlet face, left side periodic face, bottem face), Figure4-after asssociation of vertex with points. face, two periodic faces and outlet face). I don't known how to fix the quarter O-grid to capture the propeller blade geometry. I have seen some post about Meshing wind turbine but I didn't get an idea to mesh my geometry. It will be great if will be great if someone help me to fix my problem. I have attached my geometry and blk file in the following link.

Geometry file
http://jyraphe.isae.fr/file.php?h=R5...44f48e5c361015

Block file
http://jyraphe.isae.fr/file.php?h=R7...9c816d30ae511e

project file
http://jyraphe.isae.fr/file.php?h=R0...6e5ea47498ce4d

Thanks in advance for your information. please help me to mesh this geometry. I am trying for the past 1month to mesh this geometry.
Attached Images
File Type: jpg geometry.jpg (41.1 KB, 50 views)
File Type: jpg INITIAL_block.jpg (39.0 KB, 54 views)
File Type: jpg quater_o_grid.jpg (41.1 KB, 46 views)
File Type: jpg after_point _association.jpg (42.6 KB, 47 views)
venkat_aero2007 is offline   Reply With Quote

Old   June 26, 2013, 18:51
Default
  #14
Member
 
Ye Zhang
Join Date: Dec 2009
Location: Delft,Netherland
Posts: 91
Rep Power: 7
kiddmax is on a distinguished road
Dear venkatesh

Did you solve this problem? I face the same problem as you. I will appreciate if you have some idea to solve it.

Best regards,
Ye
kiddmax is offline   Reply With Quote

Old   June 27, 2013, 03:58
Default Propeller blade meshing
  #15
Member
 
venkatesh
Join Date: May 2012
Posts: 93
Rep Power: 5
venkat_aero2007 is on a distinguished road
Hi,
you can search for the thread on 'Quarter O-grid topology for propeller blade'. Far has given a nice idea to deal in the case of meshing propeller blade
venkat_aero2007 is offline   Reply With Quote

Old   June 27, 2013, 05:54
Default
  #16
Member
 
Ye Zhang
Join Date: Dec 2009
Location: Delft,Netherland
Posts: 91
Rep Power: 7
kiddmax is on a distinguished road
Hey Venkatesh,

Thank you! I will search it!

Best regards,
Ye
kiddmax is offline   Reply With Quote

Old   June 27, 2013, 06:04
Default
  #17
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,971
Blog Entries: 6
Rep Power: 39
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
Quarter O-grid topology for propeller blade
Far is offline   Reply With Quote

Old   September 29, 2013, 02:25
Default
  #18
New Member
 
gaurav kumar yadav
Join Date: Jul 2013
Posts: 19
Rep Power: 4
gaurav11 is on a distinguished road
Hi,can you please upload video for the blocking strategy.
gaurav11 is offline   Reply With Quote

Old   September 29, 2013, 23:40
Default
  #19
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,971
Blog Entries: 6
Rep Power: 39
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
For propeller blade or general wing meshing in ICEM CFD hexa?
Far is offline   Reply With Quote

Old   September 30, 2013, 00:00
Default
  #20
New Member
 
gaurav kumar yadav
Join Date: Jul 2013
Posts: 19
Rep Power: 4
gaurav11 is on a distinguished road
For propeller blade. I am very new to ICEM and I am working on a marine propeller for my project work.
gaurav11 is offline   Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
[ICEM] ICEM Hexa Meshing Automation Haasini ANSYS Meshing & Geometry 1 April 24, 2012 22:46
[ANSYS Meshing] Icem cfd - hexa meshing arunkumarnd ANSYS Meshing & Geometry 9 April 12, 2012 05:47
[ICEM] Wing Trailing Edge Prism and prism width srad ANSYS Meshing & Geometry 2 March 12, 2012 10:10
ICEM aircraft mesh trailing edge difficulty MontyR ANSYS Meshing & Geometry 4 July 23, 2011 21:46
Structured mesh of a 3d sharp trailing edge Gilles Main CFD Forum 2 May 23, 2008 13:23


All times are GMT -4. The time now is 09:49.