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Simulation Mechanical and Multiphysics

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Employee
Joey.X
Posts: 259
Registered: ‎06-14-2010

Re: Help with multiphysics

06-26-2012 07:47 AM in reply to: Sultan9009

This is a typical modeling issue, the physcial model has to be converted to reasonable numerical model in sumilation, and (probally) the simulation results may need some treatments such as simple offset. 

 

Physically you know the pressure and velocity at one outlet only, in simulation setup, to make solution stable numerical model, you can specify vBC at outlet as what you know, and zero pressure at inlet (this is a assumption). simulation will calculate compelete fluid domain including all nodal velocity and pressure, you may get the pressure value not consistent on outlet as you already know, then you can make an pressure offset in pressure result. Hope this helps.

Jianhui Xie, Ph.D
Principal Engineer
MFG-Digital Simulation
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Active Contributor
Sultan9009
Posts: 34
Registered: ‎06-19-2012

Re: Help with multiphysics

06-26-2012 04:34 PM in reply to: Joey.X

I tried what you said, but I still got a convergence error. When I try to set the pressure zero at one surface, it says I can not do that. 

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Active Contributor
Sultan9009
Posts: 34
Registered: ‎06-19-2012

Re: Help with multiphysics

06-26-2012 05:45 PM in reply to: Sultan9009

I do not know what to do about the divergence error.

I uploaded the new model, where I made the boundary conditions simple.

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