For 10 points, name this property, which quantifies a fluid's internal resistance to flow.
One method for solving for thermodynamic pressure utilizes a constant of proportionality named after the "volume" or "bulk" version of this property. This property is zero in Euler's fluid equations and the Prandtl number is given as the kinematic version of this property over thermal diffusivity. This property's kinematic version is also a parameter in the Navier-Stokes equations and there is also a dynamic version of it. Below the lambda point, helium fluids possess a value of zero for this quantity, as they become superfluids. For 10 points, name this property, which quantifies a fluid's internal resistance to flow.
One method for solving for thermodynamic pressure utilizes a constant of proportionality named after the "volume" or "bulk" version of this property.
{viscosity}