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S. May 8, 2007 00:11

Gravity Vector in CFX

I'm trying to model a buoyant flow. My geometry is "upside down" (i.e. the +y is supposed to be "down"). Anyway, for my gravity vector I put the following:

x: 0 y:+9.81 m/s z:0

Since I am doing a negatively buoyant flow, the flow is supposed to go in the direction of +y, however, it seems to be going the other way. Has anyone else had this problem when using a positive gravity vector for an "upside-down" geometry?

Ardisia May 8, 2007 01:53

Re: Gravity Vector in CFX
Just check your default density value, try to set it to be the value from solver-running monitored value (in the right-hand side of solver)

S. May 8, 2007 13:28

Re: Gravity Vector in CFX
I am doing Boussinesq so I don't have a reference density...only a reference Temp.

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