Lim Soon Yee creator author.. text my 2020 monographic eng xii, 50 pages : illustrations (some color) ; 30 cm. + 1 CD-ROM One of the most noteworthy achievements in reverse osmosis (RO) efficiency is the improvement in membrane permeance. Although current membranes offer higher permeance (and flux) than older RO membranes, increases in permeate flux are limited by concentration polarisation (CP) and fouling. Therefore, innovation is needed to reduce CP to further increase permeate flux. An unsteady forced slip velocity can disrupt the boundary layer, thus reducing CP. This paper uses Computational Fluid Dynamics (CFD) to analyse the effect of membrane permeance on the resonant frequency for an unsteady forced slip velocity, as well as the resulting mass transfer enhancement. The results show that the resonant frequency of the unsteady forced slip velocity is not affected by the membrane permeance. Although the results show a peak in the mass transfer enhancement factor for permeance values in the range typically used for brackish water, In addition, this thesis found that that at any membrane permeance, slip velocity can increase the maximum shear stress (𝜏̅𝑚𝑎𝑥) by at least 130 %, thus minimising the effects of fouling. specialized Lim Soon Yee Faculty of Chemical and Process Engineering Technology Thesis (Master of Science) -- Universiti Malaysia Pahang – 2020 Includes bibliographical references Faculty of Chemical and Process Engineering Technology Universities and colleges Dissertations Theses THE0009105(Local) UMP 220215 20251125110015.0 eng