adding features to elements of an existing mesh?

bunni · November 4, 2010, 10:28

Hi all

I'm relatively new to OF, so forgive if this is a silly question. I'm designing a mesh with blockMesh - not importing files from another program. So, the following happens
1) I make a tank with a drain at the bottom. So, I've made a few hex blocks, faces etc.
2) now I want to add a pipe to the side of the tank. So, is there a way to attach the pipe to the surface of the mesh? Because, if not, then I cut my tank in half, put pipe halfway up, but I've basically tripled my hex blocks - instead of the blocks being from the the bottom of the tank to the top, they are now bottom of tank to bottom pipe inlet; bottom pipe inlet to top pipe inlet; top pipe inlet top of tank. And, if I want to change the position of the pipe, it gets very involved.

Is there an easier way?

vkrastev · November 4, 2010, 13:03

The block-mesh utility allows you to build only block-structured meshes, which means that you must satisfy the consintency condition at the interface between two adiacent blocks. In a few words: if you add the "pipe block", than you have to split also the adiacent domain, and this is unavoidable.
Hope this helps

V.

November 4, 2010, 10:28	adding features to elements of an existing mesh?	#1
bunni Member Join Date: Mar 2010 Posts: 31 Rep Power: 16	Hi all I'm relatively new to OF, so forgive if this is a silly question. I'm designing a mesh with blockMesh - not importing files from another program. So, the following happens 1) I make a tank with a drain at the bottom. So, I've made a few hex blocks, faces etc. 2) now I want to add a pipe to the side of the tank. So, is there a way to attach the pipe to the surface of the mesh? Because, if not, then I cut my tank in half, put pipe halfway up, but I've basically tripled my hex blocks - instead of the blocks being from the the bottom of the tank to the top, they are now bottom of tank to bottom pipe inlet; bottom pipe inlet to top pipe inlet; top pipe inlet top of tank. And, if I want to change the position of the pipe, it gets very involved. Is there an easier way?

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November 4, 2010, 13:03		#2
vkrastev Senior Member Vesselin Krastev Join Date: Jan 2010 Location: University of Tor Vergata, Rome Posts: 368 Rep Power: 20	The block-mesh utility allows you to build only block-structured meshes, which means that you must satisfy the consintency condition at the interface between two adiacent blocks. In a few words: if you add the "pipe block", than you have to split also the adiacent domain, and this is unavoidable. Hope this helps V.