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

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Old   May 18, 2012, 13:19
Thumbs up ICEM Hexa meshing tutorial - Wing with sharp trailing edge
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Please refer to thread http://www.cfd-online.com/Forums/ans...mesh-wing.html. 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
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Old   May 18, 2012, 15:17
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Youtube link : http://www.youtube.com/watch?v=mgjRT...ature=youtu.be
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Old   May 19, 2012, 20:18
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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.
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Old   May 19, 2012, 20:18
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Last edited by PSYMN; May 22, 2012 at 10:12. Reason: Didn't intend to share that with the world at large...
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Old   May 20, 2012, 02:31
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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.
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Old   May 27, 2012, 10:36
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Quote:
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Reason: Didn't intend to share that with the world at large...

hehehe. Sending you today. Is there any chance?
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Old   June 24, 2012, 15:34
Default Propeller blade Hexa meshing using ICEM CFD
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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, 276 views)
File Type: jpg Domain.jpg (25.3 KB, 161 views)
File Type: jpg blade with mesh.jpg (95.1 KB, 224 views)
File Type: jpg block statergy.jpg (89.7 KB, 160 views)
File Type: jpg bad elements.jpg (44.4 KB, 156 views)
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Old   June 24, 2012, 15:39
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Figure 6 and 7
Attached Images
File Type: jpg block_ extension to top.jpg (40.4 KB, 91 views)
File Type: jpg bad_elements_extension.jpg (46.9 KB, 78 views)
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Old   June 24, 2012, 15:47
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Are you going use periodic boundary?
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Old   June 24, 2012, 15:54
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Use topology like this http://www.cfd-online.com/Forums/ans...ic-trough.html
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Old   June 24, 2012, 16:06
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Yes I am going to use periodic boundary.
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Old   June 24, 2012, 22:12
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Quote:
Originally Posted by Far View Post
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.
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Old   July 14, 2012, 06:59
Default Quarter O-grid
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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, 94 views)
File Type: jpg INITIAL_block.jpg (39.0 KB, 93 views)
File Type: jpg quater_o_grid.jpg (41.1 KB, 82 views)
File Type: jpg after_point _association.jpg (42.6 KB, 79 views)
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Old   June 26, 2013, 19:51
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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
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Old   June 27, 2013, 04:58
Default Propeller blade meshing
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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
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Old   June 27, 2013, 06:54
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Hey Venkatesh,

Thank you! I will search it!

Best regards,
Ye
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Old   June 27, 2013, 07:04
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http://www.cfd-online.com/Forums/ans...ler-blade.html
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Old   September 29, 2013, 03:25
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Hi,can you please upload video for the blocking strategy.
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Old   September 30, 2013, 00:40
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For propeller blade or general wing meshing in ICEM CFD hexa?
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Old   September 30, 2013, 01:00
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For propeller blade. I am very new to ICEM and I am working on a marine propeller for my project work.
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