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Incompressible Solver - What does this mean?

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Old   January 11, 2019, 05:23
Default Incompressible Solver - What does this mean?
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Hello,

I am wondering what the effect of an incompressible solver is?

So I have a mass flow inlet and a pressure outlet. If I switch to an incompressible solver, the density of my ideal gas does no longer depend on pressure.

But what happens to my ideal gas formulation: p = rho *R *T

According to: https://www.sharcnet.ca/Software/Flu...ug/node332.htm my density is now calculated by an operating pressure.

1) So for each cell in my domain the navier-stokes equations are solved for velocity and pressure. But for calculating density, not the local pressure of the cell is used but the operating one in p = rho *R *T ?

2) But why can I avoid this way osciallations regarding my solution (for example air velocity).


Thank you for your explenations

Best regards
Moritz
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