Hydrofoil case set up

goldbeard · March 28, 2013, 23:13

Hello guys,

I have started to get familiar with OpenFOAM. Is there anyone out there who can offer some advice to either set a up a new case or (preferably) alter an existing case to get an idea of the performance of our foils. We have several foils, all with .stl files. We want to import them info OpenFOAM and start comparing them. When we understand how to use the CDF, we want to use them to design new foils as well.

I am picking my way through OpenFOAM at a slow pace, but learning everyday.

I am enjoying the learning, and would be very grateful to anyone who would like to help.

Cheers,

Andrew

sail · March 29, 2013, 11:21

out of curiosity, are we talking about wave (or free surface) piercing foils, cavitating foils, or what?

for every aspect you'll need different solver, strategies, etc...

haakon · March 29, 2013, 16:15

Independent on the type of hydrofoil, I would strongly recommend to start with some simple, 2D, incompressible (air|hydro)foil simulations. For those cases the density of file fluid does not matter (as long as it is incompressible and far away from any free surface), and you can use results from airfoil studies as reference. There are a lot of comparison results with f.ex. NACA 4-digit airfoils (ex. NACA-0015).

I suggest to start with Google: https://www.google.com/search?client...utf-8&oe=utf-8

March 28, 2013, 23:13	Hydrofoil case set up	#1
goldbeard New Member Join Date: Mar 2013 Posts: 13 Rep Power: 13	Hello guys, I have started to get familiar with OpenFOAM. Is there anyone out there who can offer some advice to either set a up a new case or (preferably) alter an existing case to get an idea of the performance of our foils. We have several foils, all with .stl files. We want to import them info OpenFOAM and start comparing them. When we understand how to use the CDF, we want to use them to design new foils as well. I am picking my way through OpenFOAM at a slow pace, but learning everyday. I am enjoying the learning, and would be very grateful to anyone who would like to help. Cheers, Andrew

March 29, 2013, 11:21		#2
sail Senior Member Vieri Abolaffio Join Date: Jul 2010 Location: Always on the move. Posts: 308 Rep Power: 17	out of curiosity, are we talking about wave (or free surface) piercing foils, cavitating foils, or what? for every aspect you'll need different solver, strategies, etc... __________________ http://www.leadingedge.it/ Naval architecture and CFD consultancy

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March 29, 2013, 16:15		#3
haakon Senior Member Join Date: Dec 2011 Posts: 111 Rep Power: 20	Independent on the type of hydrofoil, I would strongly recommend to start with some simple, 2D, incompressible (air\|hydro)foil simulations. For those cases the density of file fluid does not matter (as long as it is incompressible and far away from any free surface), and you can use results from airfoil studies as reference. There are a lot of comparison results with f.ex. NACA 4-digit airfoils (ex. NACA-0015). I suggest to start with Google: https://www.google.com/search?client...utf-8&oe=utf-8