Friends, while solving a problem of centrifugal pump i am facing a problem in CFD Solver while selecting INLET AND OUTLET DOMAIN it is giving me a error about inlet passage limitationplease guide

Why your INLET and OUTLET are two seperate domains? Can you Please elaborate little more.

HI Mehul, I am using Blade modeler for development of Profile. and then i transfered it to Turbo grid. While meshing it is giving me error. "THERE IS NO VALID INLET DOMAIN TO MESH. MORE THE INLET FOR THE PASSAGE AT THE HUB OR SHROUD CLOSE TO THE BLADE TO CREATE AN INLET DOMAIN"

If i do not select option to select inlet and outlet domain for meshing it gives me mesing and run CFX Solver also but results are wrong.

What is wrong with this. any mistake in Blade modler or Turbo grid.

I think there is a mistake in your Blade Modeler. According to me , irrespective of geometry, your mesher should not have any objections for inlet and outlet boundary.

Or there is a chance that you have started applying boundary conditions without specifying the domain first.

Dear Chetan!

Go through the tutorial for Centrifugal Compressor.

It will clear your views of BM and Tgrid.

Problem is with turbogrid,which requires your curve from inlet side to be slighlty farther from your blade domain periodic curves.

Mr. Pankaj

you are right but for Centrifugal compressor they had given .GTM file and there is no problem in Specifying inlet and outlet domain. still i feel something wrong with dimension.

please give me your id i will send it to you.

Dear Chetan,

In Bladegen with Blade to Blade view u can see the dotted blue lines as periodic boundaries,similarly when you export it to turbogrid,it creates Inlet and Outlet boundaries by default.

In meridional view,arrow direction represents flow direction from inlet and outlet.So you can move these boundaries close to the blade or farther from the blade.

Now when u will export it to turbogrid,u will see thse boundaries.Start with topology set definition,let select HJCL grid and use default values to put a grid,else change the width factor from 0.5 to 0.4,0.3 as suitable to grid.

Try out thse things,even if u still have problem,then dont hesitate to put it.

good luck.pankaj.

[Bdew8556]

Hey Pankaj,

Do you have any thoughts on this?

http://www.cfd-online.com/Forums/cfx...turbogrid.html