Compressible Liquids

• obeying the logarithmic law:

  	(1)

  where ρ0 is the liquid's density under the reference pressure P0, C, B are coefficients, here ρ0, C, and B can depend on temperature, P is the calculated pressure;

• obeying the power law:

  	(2)

  where, in addition to the above-mentioned designations, n is a power index which can be temperature dependent.

Also if the liquid dynamic viscosity depends on pressure, it can be considered within the following approximation:

	(3)

where, in addition to the above-mentioned designations, μ0 is the liquid’s dynamic viscosity under the reference pressure P0, a is a coefficient which can be temperature dependent and P' = 105 Pa is a constant.