A nonlinear dynamic cascade model with varying coefficients has becn derivcd for a sixteen-stage countercurrent extractor representing the first cycle of a Pure
Peng-Robinson equation of state was modified to represent vapor-liquid equilibria for hydrogen-containing systems. A new expression of the temperature dependent
The concept of local fluidity is proposed and applied to the derivation of a new three-parameter correlation for liquidviscosity with temperature,φ=1/μ=B_o[(V