Falling Papers

scarllatti · August 22, 2009, 23:39

Hello
I want to simulate falling papers and disks with open foam. I am looking for something like this : http://joeyhuangnyc.webs.com/java.html .
I mean to create a disk and then release it and then calculate the fluid forces due to the downward motion of disk because of gravitational force. I want the disk move in fluid and then apply Navier-Stokes equations to that to get the motions that you can see in the URL. I am new to open foam and CDF subject.
I will be very very grateful if someone can help me.
Thanks a lot

sega · August 23, 2009, 04:36

Sounds challenging, but first of all your link is not working ...

hansel · August 30, 2009, 18:16

As someone who was new about 6 months ago, I'd suggest that this not be your first project. Start with some of the tutorials, like the cavity example and play with that. Then you might want to try some simpler ggi stuff where the mesh (object) moves.

Your goal is especially challenging because it sounds like you'd like to use the forces generated on the object to actually determine how the object moves, and I don't think there is a standard method for doing that. (But I could be wrong since I have only 6 months of experience.)

I simulate wind turbines, but I do that by just setting a spinning rate and measuring the forces on the turbine. The air doesn't actually change how it spins.

August 22, 2009, 23:39	Falling Papers	#1
scarllatti New Member Join Date: Aug 2009 Posts: 5 Rep Power: 17	Hello I want to simulate falling papers and disks with open foam. I am looking for something like this : http://joeyhuangnyc.webs.com/java.html . I mean to create a disk and then release it and then calculate the fluid forces due to the downward motion of disk because of gravitational force. I want the disk move in fluid and then apply Navier-Stokes equations to that to get the motions that you can see in the URL. I am new to open foam and CDF subject. I will be very very grateful if someone can help me. Thanks a lot Last edited by scarllatti; August 23, 2009 at 12:30.

August 23, 2009, 04:36		#2
sega Senior Member Sebastian Gatzka Join Date: Mar 2009 Location: Frankfurt, Germany Posts: 729 Rep Power: 20	Sounds challenging, but first of all your link is not working ... __________________ Schrödingers wife: "What did you do to the cat? It's half dead!"

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August 30, 2009, 18:16		#3
hansel Senior Member Steve Hansel Join Date: Jun 2009 Location: Colorado, USA Posts: 112 Rep Power: 17	As someone who was new about 6 months ago, I'd suggest that this not be your first project. Start with some of the tutorials, like the cavity example and play with that. Then you might want to try some simpler ggi stuff where the mesh (object) moves. Your goal is especially challenging because it sounds like you'd like to use the forces generated on the object to actually determine how the object moves, and I don't think there is a standard method for doing that. (But I could be wrong since I have only 6 months of experience.) I simulate wind turbines, but I do that by just setting a spinning rate and measuring the forces on the turbine. The air doesn't actually change how it spins.