Axisymmetric swirl - angular velocity for UDF
 

hi everyone

i'm making a momentum field (tangential - like lorenz force in a magnetic case) to spin/rotate liquid metal in a cylindrical space. I need the angular velocity of every cell for my UDF. In 3D i can get it from velocity components and radius (radius is generated from coordinates).

but what is c_u(), c_v(), c_w() in axisymmetric swirl 2d. how can I get the angular velocity in rad/sec (or tangential velocity).

thanks
cheers
TS

plz help me!!!
 

Hi dear Tsaba Nagy.
I need to use 2D geometry for my solver and see axisymmetric swirl 2d in your comment!!!please tell me how can I do this for my project?

please write, what you want :) since the post I developed a lot in these stuff. I hope I can help you ;)

details
 

dear Tsaba Nagy.
I want to use 2Daxisymmetric for openFoam,and for this reason used makeAxialmesh and coolapse to make wedge type for boundary.
I make it,but my result after run is not correct and differrent with 3Dmodel.other friends tell me ,I must be use axisymmetric swirl 2d .....
if my work in modelling 2DAxisymetric is not correct please tell me???
Thanks a lot.

the 2d axs. swirl solver is needed when there are swirling velocities too in the system you wanna model. In this case I'm not sure, that there is this type of velocity inside but worth to try.

forget this wedge cut shape model. for 3D draw the full media. for 2D the half of the meridional cut is enough - as you drew on the bottom of the first paper. set axis boundary condition here, others can be simple in/otlets, walls, etc.

if the inlet of the pressure is homogenous on the surface, the 2D is totally enoug to see what's happening inside.

did I understood well, what you want? :)

answer
 

Thanks for your answer.
but i know my drew on the bottom of the first paper is correct!!!!but i dont know how can i do this???in openFoam 2D, conveted in 3D!!!

I just work with FLUENT, so I can help justwith it now :/