turbine modelling

[JamesMcNaughton]

omegay is the angular velocity. So you have it set as 2pi radians per second - ie 1 revolution per second.

[stage75]

Hi James,

Ahh OK, I undestand now

thank's

[stage75]

Hello,

Normally in my simulation I should see the vortices and recirculation areas, but I get that rotation of fluids and no recirculation.

[stage75]

...nobody has an idea.?!

[JamesMcNaughton]

It could be many issues.. have you an image of the flow-field to better understand what the problem is?

[stage75]

Hello,

THis is an exemple of an image, Since I have the blades and the two bars at the basin extrimity, normally I must obtiened the recirculation areas (vortex)!! but in this case I feel that the coupling with turbine and fluid was not taken into account!! (image attached). The turbine does not disturb the flow!!

[stage75]

Please do you have an idea, why I don't observe the recirculation area in locality of impller??

[JamesMcNaughton]

It's a while since I used the code-code coupling but it looks like the whole fluid is rotating - are you plotting vectors by relative velocity? Can you just show a plane / slice through the domain showing the velocity and pressure fields that will show if the coupling is taken into account as you wish.

Also what method are you using to rotate, frozen rotor or moving the mesh?

[stage75]

Tis is a slice!

I plotting the velocity !

For the rotate I use in the surboutine "icorlio=1"

[JamesMcNaughton]

I meant velocity field as per (from http://code-saturne.org/forum/viewtopic.php?f=10&t=945) but anyway..

If you use icorio = 1 then it is using Coriolis source terms and not moving the blade. I think from your images you have two outer stationary blades and two inner rotating ones. Is this correct?

If so to see the interaction between the inner blades (and hence the recirculation) passing the outer you must use icorio = 0 and physically rotate the blades. You can (I think) restart the calculation from your current one but set icorio = 0.