[ICEM] How to do 2D hybrid mesh around hydrofoil

jaber · January 3, 2013, 13:20

Hello all,
I am simulating a viscous flow around a 2D NACA hydrofoil with a rectangular domain (using FLUENT) especially in (static) stall conditions. Then have to introduce a large angle of attack (from 0 to 40 degre). According to literature, I have to do an hybrid mesh: structured (quadri) mesh on boundary layer around the hydrofoil and even near the top and bottom walls, and unstructured (tri) mesh on the rest of the domain.
Few times ago, I have successfully done a similar model but without introducing angle of attack, within ICEMCFD hexa blocking. Which I have to abandon now. Unfortunately I haven't found any example or help concerning 2d hybrid mesh on ICEMCFD tutorial. Then I have searched on CFD-online forum. I am trying with "Bigio 1st approach":Hybrid mesh for 2D boundary layer . But I get difficulties ignoring details on this approach. And I don’t know if it can give good mesh? Time is running and I have to finish my project in the shortest time.
Please, could anyone give me help about this approach or other manner to do the 2d hybrid mesh?
Any suggestion will be appreciate.
Thanks in advance.

jaber · January 3, 2013, 13:35

Sorry here is the link: "Bigio 1st approach":http://www.cfd-online.com/Forums/ans...ary-layer.html

ghorrocks · January 3, 2013, 19:11

You can use either a prism/tri mesh or a ICEM blocked mesh. If properly constructed either mesh will be fine.

Note many stall effects are 3D and transient. Your 2D assumption may not be appropriate.

Also, this is the CFX forum. Try the fluent forum for details on fluent.

January 3, 2013, 13:20	[ICEM] How to do 2D hybrid mesh around hydrofoil	#1
jaber New Member Join Date: Apr 2009 Posts: 18 Rep Power: 17	Hello all, I am simulating a viscous flow around a 2D NACA hydrofoil with a rectangular domain (using FLUENT) especially in (static) stall conditions. Then have to introduce a large angle of attack (from 0 to 40 degre). According to literature, I have to do an hybrid mesh: structured (quadri) mesh on boundary layer around the hydrofoil and even near the top and bottom walls, and unstructured (tri) mesh on the rest of the domain. Few times ago, I have successfully done a similar model but without introducing angle of attack, within ICEMCFD hexa blocking. Which I have to abandon now. Unfortunately I haven't found any example or help concerning 2d hybrid mesh on ICEMCFD tutorial. Then I have searched on CFD-online forum. I am trying with "Bigio 1st approach":Hybrid mesh for 2D boundary layer . But I get difficulties ignoring details on this approach. And I don’t know if it can give good mesh? Time is running and I have to finish my project in the shortest time. Please, could anyone give me help about this approach or other manner to do the 2d hybrid mesh? Any suggestion will be appreciate. Thanks in advance.

January 3, 2013, 13:35	[ICEM] How to do 2D hybrid mesh around hydrofoil	#2
jaber New Member Join Date: Apr 2009 Posts: 18 Rep Power: 17	Sorry here is the link: "Bigio 1st approach":http://www.cfd-online.com/Forums/ans...ary-layer.html

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January 3, 2013, 19:11		#3
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	You can use either a prism/tri mesh or a ICEM blocked mesh. If properly constructed either mesh will be fine. Note many stall effects are 3D and transient. Your 2D assumption may not be appropriate. Also, this is the CFX forum. Try the fluent forum for details on fluent.