New designs of turbulence promoters to use in saltwater purification processes

Main Article Content

Mounir Amokrane
Djamel Sadaoui


This paper describes a two-dimensional computational fluid dynamics (CFD) model of flow with mass transfer to simulate a membrane separation system. The fluid domain comprises two reverse osmosis (RO) membranes and is fitted with different wavy inserts that act as turbulence promoters. Four types of insert designs were evaluated in terms of salt deposition on the membranes, permeate flux, axial pressure drop in the channel, and plots of the Sherwood number against the Power number. According to numerical simulations, under the operating conditions of this investigation, the proposed designs generate better results than commercial designs. The gain in pure water flux achieves up to 2%, and salt deposition on the membrane surface is reduced by ~5% than the commercial Zigzag spacer arrangement.

Article Details

How to Cite
M. Amokrane and D. . Sadaoui, “New designs of turbulence promoters to use in saltwater purification processes”, J. Ren. Energies, vol. 1, no. 1, pp. 1 -, Jun. 2022.


Haidari AH, Heijman SGJ, van der Meer WGJ, Effect of spacer configuration on hydraulic conditions using PIV, Sep Purif Technol 2018;199:9-19.

Amokrane M, Sadaoui D, Koutsou CP, Karabelas AJ, Dudeck M, A study of flow field and concentration polarization evolution in membrane channels with two-dimensional spacers during water desalination, J Membr Sci 2015;477:139–150.

Karabelas AJ, Kostoglou K, Koutsou CP, Modeling of spiral wound membrane desalination modules and plants – review and research priorities, Desalination 2015;365: 165-186.

Haidari AH, Heijman SGJ, Van der Meer WGJ, Optimal design of spacers in reverse osmosis. Sep Purif Technol 2018;192:441-456.

Ranade VV, Kumar A, Fluid dynamics of spacer filled rectangular and curvilinear channels, J Membr Sci 2006; 271:1–15.

Guillen G, Hoek EMV, Modeling the impacts of feed spacer geometry on reverse osmosis and nanofiltration processes, Chem Eng J 2009;149:221–231.

Amokrane M, Sadaoui D, Improving the reverse osmosis desalination system with tilted oval spacers in a zigzag configuration, Desal Water Treat 2021;211:359–368.

Geraldes V, Semião V, Pinho MN, Numerical modelling of mass transfer in slits with semi-permeable membrane walls, Eng Comput;2000: 17:192-217.

Amokrane M, Sadaoui D, Undulated insert for boosting desalination efficiency in membrane systems, Braz Journal of Chem Eng 2021,