Well, looks like pretty straight forward problem...! Problem: The liquid level in a simple gravity distributor in an Industrial column at 58 m3/hr is 215 mm, when the chosen liquid medium is water at 18 C (Density: 998.6 kg/m3 and Viscosity: 1.06 mPa s). But when a change in liquid medium with properties (Density: 352 kg/m3 and Viscosity: 0.05mPa s) the liquid level is increased to 286 mm. How to calculate or deduce the relationship between the densities and viscosities with liquid levels or height of a liquid? Can anyone help me out with the problem....any help is appreciated...Thanks in advance!.