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-   -   grid for pipe with orifice in gambit (http://www.cfd-online.com/Forums/ansys-meshing/70476-grid-pipe-orifice-gambit.html)

fofo November 25, 2009 10:54

grid for pipe with orifice in gambit
 
Hey,

I have a project where I have to modelise a turbulent flow in a circular pipe including an orifice meter. I have already done the geometry, and my first lenght is 1 m and my second lenght is 2 m, but now I have to mesh but with a limited number of nodes, so I have to realise a grid more and more tight going to the orifice, but not near of the wall because I use standard waal functions. Do you know how I can do that? apparently I need to use a ratio b/a < 10 but I don't really understant what it is, and I really need help.

Thanks a lot

kingjewel1 November 30, 2009 16:55

Quote:

Originally Posted by fofo (Post 237691)
Hey,

I have a project where I have to modelise a turbulent flow in a circular pipe including an orifice meter. I have already done the geometry, and my first lenght is 1 m and my second lenght is 2 m, but now I have to mesh but with a limited number of nodes, so I have to realise a grid more and more tight going to the orifice, but not near of the wall because I use standard waal functions. Do you know how I can do that? apparently I need to use a ratio b/a < 10 but I don't really understant what it is, and I really need help.

Thanks a lot

Yeah attach a space function to the surface of your pipe and decrease cell size inwards. Are you using a boundary layer?

Kruzster December 2, 2009 12:33

@ kingjewel1
 
do u have any sample tutorial as to how the meshing is to be carried out..??


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