flapping wings/fishlike propulsion
 

Hi,

Currently I'm using an academic software to simulate flappings wings. At this point I would like to compare my results with the results obtained with another software, for instance fluent. I'm wondering if it's possible to do this kind of simulation on fluent.

In a few words, what I need to do is to move my geometry up and down and make it rotate around its spanwise axis, just to simulate the kinematics of a wing. Is this possible in fluent?

I really appreciate your comments and suggestions,

Cheers,

joel

Re: flapping wings/fishlike propulsion
 

Yes you can by using the dynamic mesh in Fluent. I deal with fluttering wings but I do not the order of magnitude of your displacements. I'm interested in how you deal with flapping wings with your own code. If you want to contact me my mail is: lucav79@alice.it Luca

Re: flapping wings/fishlike propulsion
 

this is what I am doing now. my thesis is to simulate the bionic propulsion with FLUENT.

Re: flapping wings/fishlike propulsion
 

Can you share with us some information?

Re: flapping wings/fishlike propulsion
 

hey there,

I'd be very interested in getting informed about teh way you tackle this problem.

I a simulating the kinematics of a flapping wing also, using Fluent. I am resorting to a compiled UDF and dynamic meshing.

However, whenever I lauch the simulation, there sems to be negative volumes at the first time step...

Does anyone have a clue? Or did anyone encountered the same error? by the way, my mesh is fine before any iteration.

Thx a billion! Astozzia

Re: flapping wings/fishlike propulsion
 

the reason for the negative volumes is that ur time step size is too large. reduce ur time step size. by the way, my msn: [de_santis1981@hotmail.com] i really appreciate anyone who interested in the bionic propulsion to communicate with me.

Re: flapping wings/fishlike propulsion
 

Hello !

I am trying to use Fluent for flapping wing studies. I wish to know if RNG K-e model with enhanced wall treatment functions will be OK. If any other simpler model will suit it may be better (because unsteadiness eats away all the time and computer resiurces)

Re: flapping wings/fishlike propulsion
 

In my calculations, i found K-w model is much better.