Thank you for the help. It seems to be working now.
I had no idea you could use the "velocity 1 condition = ..." in the boundary conditions section, this is what was troubling me.
regardless, I should be ok from here on in. thanks again.
Search found 14 matches
- 26 Oct 2011, 22:54
- Forum: ElmerSolver
- Topic: vertical axis wind turbine
- Replies: 6
- Views: 5817
- 18 Oct 2011, 22:59
- Forum: ElmerSolver
- Topic: vertical axis wind turbine
- Replies: 6
- Views: 5817
Re: vertical axis wind turbine
If we are specifying velocity at the boundaries using the conditional BC method described above, how do we ensure there is flow into the domain, except by using the regular "boundary condition" section, which would create dirichlet conditions both upwind and downwind (this is not what is d...
- 15 Oct 2011, 10:53
- Forum: ElmerSolver
- Topic: vertical axis wind turbine
- Replies: 6
- Views: 5817
Re: vertical axis wind turbine
Thanks for your quick response, Peter. What you said is basically what I expected. So, to summarize, I understand that the body force section should be of the form: Body Force 1 Velocity 1 = Variable Time, Coordinate 1, Coordinate 2 Real MATC "(cos(OMEGA*tx(0))-1)*tx(1)-sin(OMEGA*tx(0))*tx(2)+c...
- 14 Oct 2011, 01:16
- Forum: ElmerSolver
- Topic: vertical axis wind turbine
- Replies: 6
- Views: 5817
vertical axis wind turbine
I wish to simulate a vertical axis wind turbine (2D) which will be centered in a circular boundary. As such I have 2 conceptual questions: 1) Will rotating the boundary conditions attain the same effect as rotating the entire geometry? Correct me if I'm wrong, but don't the Navier Stokes equations c...
- 01 Sep 2011, 04:38
- Forum: ElmerSolver
- Topic: Rotating Flow test case
- Replies: 2
- Views: 2254
Re: Rotating Flow test case
Thank you for your response. I see now how it works... I have one more question I hope you can answer. Let's say I would like to model a rotating cylinder in a cross flow using this method. Since I would need to use a rotating boundary condition, is there any way I could ensure just a zero pressure ...
- 17 Aug 2011, 01:11
- Forum: ElmerSolver
- Topic: Rotating Flow test case
- Replies: 2
- Views: 2254
Rotating Flow test case
Hello, I'm wondering whether the rotating flow test case is working properly. TEST CASE 1 solves very well, creating the desired rotating flow. However, TEST CASE 2, which I believe is intended to produce similar results, only produces a zero velocity field (or at least zero down to machine precisio...
- 24 Jun 2011, 08:46
- Forum: ElmerGUI
- Topic: Coriolis force?
- Replies: 5
- Views: 5966
Re: Coriolis force?
Where might one find this test case? Is it documented anywhere?
- 22 Jun 2011, 02:55
- Forum: ElmerSolver
- Topic: Underwater turbine
- Replies: 3
- Views: 3674
Re: Underwater turbine
Hi, I'm trying to do a similar simulation so I will bring back the topic of this thread. Is it possible to have a rotating surface AND have that surface experience deflections due to stress induced by fluid flow? The original post has the turbine surface being rotated in time due to a simple rotatio...
- 05 May 2011, 09:57
- Forum: General
- Topic: Parallel processing
- Replies: 4
- Views: 5996
Re: Parallel processing
It turns out it is not so simple to get parallel processing to work from the installation provided in the ubuntu repositories (at least with with LTS 10.04 version of ubuntu)... After trying for awhile i ended up cleaning elmer up and re-installing using the guidelines found at: http://www.elmerfem....
- 22 Apr 2011, 08:41
- Forum: General
- Topic: Parallel processing
- Replies: 4
- Views: 5996
Parallel processing
I just came into some decent computational power... and am about to begin the process of using ELMER for a fairly complicated FSI simulation. Problem is, I need to (obviously) perform the simulation in a parallel manner. Being completely new to parallel processing, I am wondering what suggestions yo...