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The code provides support for the variable density incompressible Euler equations. Does that mean you can input the density of the fluid density (air, water, etc…)?

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The code provides support for the variable density incompressible Euler equations. Does that mean you can input the density of the fluid density (air, water, etc…)?

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Not really if what you mean is a constant density throughout the domain. In the case of the incompressible constant-density Navier-Stokes equations, the density is irrelevant. It is only a scaling factor for the pressure. What this really means is that Gerris can deal with flows where the density varies across the domain (e.g. a mixture of two miscible fluids, or density variations due to salinity variations in the sea for example).

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