Consider a typical inside$-$out hollow fiber membrane with an internal diameter of $0\mathrm{.}05$ cm and a length of $1\mathrm{.}2$ m$.$ Water containing an herbicide $($assumed to have a diffusion coefficient, D $=10-5$cm$2/$sec$)$ is introduced to the membrane at a velocity of $100$ cm$/$s$.$ The membrane is operated at a permeate flux of $100$ L$/$m$2/$h$.$ Calculate the concentration polarization modulus $($E$/$Eo$)$ for the herbicide under laminar flow condition. Kinematic viscosity of water $=10-6$ m$2/$s$.$