What is Poissons ratio of liquid water?
Poisson’s ratio is typically applicable to solids, and usually not fluids. Water is often called “incompressible”, and an incompressibility is applicable to solids as well (for instance: rubber). If the cross section of rubber reduces enough to account for the length expanding to conserve volume, we theorize that the Poisson’s ratio would be an upper limit of 0.5. Applying this conservation of volume concept to water, I’d argue that water’s Poisson’s ratio is also 0.5. Water does have a finite bulk modulus (K) however, so it isn’t true.
