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darazsbence February 24, 2013 10:41

Boundary conditions during fluid flow
 
Hello everyone,

I did a simulation with default domain set to air, defined the boundaries (inlet: velocity, outlet: static pressure) and ran it. There was no problem. But when i changed air to water i always got an error messege, i don't know why.

Am i supposed to change inlet/outlet conditions or something else in order to get proper results?

Thank you very much.

kbaker February 24, 2013 13:50

You need to understand the physics of the problem sometimes changing material of the problem need to changing the nature of several flow parameters such as Reynolds number and this change the problem from laminar to turbulent or the opposite thing can happen so changing just properties without correct physics analysis and what you want from the numerical analysis may lead to errors in solution.

Hope this help

k.vafiadis February 26, 2013 03:32

Quote:

Originally Posted by darazsbence (Post 409788)
Hello everyone,

I did a simulation with default domain set to air, defined the boundaries (inlet: velocity, outlet: static pressure) and ran it. There was no problem. But when i changed air to water i always got an error messege, i don't know why.

Am i supposed to change inlet/outlet conditions or something else in order to get proper results?

Thank you very much.

Hello, it would be useful to describe the problem you try to solve :)


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