Computing compressibility
 

I'd like to compute the compressibility, or bulk modulus, for an almost incompressible numeric scheme, during the solution phase. The idea is to then compare the flow-field values with known experimental values for real fluids.

I've developed an equation from the general Bulk modulus, but I'd like to test this against more conventional equations, if these exist.

I'd appreciate pointers to literature sources & typically-used equations.

Many thanks,

desA