For wide-range calculations, Perry’s uses empirical correlation equations.
Liquid viscosity drops sharply as temperature rises. Perry’s often utilizes a variation of the : Perry's Handbook Viscosity
If you've spent any time in a chemical engineering lab or plant, you’ve likely encountered . Often called "the ChE Bible," its Section 2 is the go-to for physical property data, specifically viscosity . Why Engineers Use Perry’s for Viscosity For wide-range calculations
lnμ=A+BT+ClnT+DTEl n mu equals cap A plus the fraction with numerator cap B and denominator cap T end-fraction plus cap C l n cap T plus cap D cap T to the cap E-th power Perry's Handbook Viscosity
Unlike liquids, gas viscosity with temperature. Perry’s frequently cites Sutherland's Formula for these predictions: