Condition of non reflexion

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  • Last Post 17 September 2018
mariannebassil posted this 14 September 2018

Hello

I am using the pressure based solver and i don't find the way to put a condition of non reflective wall to a pressure outlet wall

thank you

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kkourbat posted this 14 September 2018

can you be more specific in your description? What version are you running? Is it steady or transient?  Pressure-based solver includes an option to specify non-reflecting outlets (or inlets)

mariannebassil posted this 14 September 2018

Im using 19.1 version, transient flow, i have a wall with pressure outlet 0 pa but i need to mention it as non reflecting wall and i dont find the option

klu posted this 14 September 2018

The general NRBCs using the pressure-based solver are not compatible with steady-state cases or the Eulerian multiphase model. For VOF or mixture multiphase cases that involve compressible gases or compressible liquids, only pressure inlets and pressure outlets can enable the non-reflecting boundary condition option. Make sure to have compressible fluids in the model for example air that uses the ideal-gas model for density.

mariannebassil posted this 15 September 2018

I am using a transient case and an ideal gas so as u said i can activate the NRBC option, please can i know how

mariannebassil posted this 17 September 2018

It is ok i found it ( acoustic wave equation>> non reflective)

Thank you anyway

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