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grid for pipe with orifice in gambit

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Old   November 25, 2009, 10:54
Default grid for pipe with orifice in gambit
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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
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Old   November 30, 2009, 16:55
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Quote:
Originally Posted by fofo View Post
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?
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Old   December 2, 2009, 12:33
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do u have any sample tutorial as to how the meshing is to be carried out..??
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