Rate of Copper Ions Removal from Copper Sulfate Solution by Cementation on Steel Turbulence Promoters Using Stirred Tank Reactor

Ismail, Amani; Mansour, M. A.; El-Gayar, Dina Ahmed; Farid, Yousra Hamdy

doi:10.4028/www.scientific.net/msf.1008.151

Cited by 1 publication

(1 citation statement)

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“…Turbulence promoters can be effectively utilized to reduce concentration polarization by periodically disturbing the boundary layer 28 , 29 . Geraldes et al 30 initiated the use of such turbulence promoters and used ladder-type arrangement of spacers in the feed channel.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of permeate flux in reverse osmosis by varying strand geometry

Shoukat

Idrees

Sajid

et al. 2022

Sci Rep

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In regions with limited potable water availability, membrane desalination is being employed to filter water using a pressure-driven approach. Because of the high energy consumption required to produce the pressure differential needed for this method, researchers have been trying different geometric designs of spacer filaments to enhance the amount of permeate flux in terms of energy utilization. The purpose of spacer filaments is to support membranes structurally and induce turbulent mixing in spiral wound membrane desalination. In this paper, the improvement of mass transfer in desalination driven by reverse osmosis has been studied using Computational Fluid Dynamics (CFD) with the introduction of spiral wound membranes that are lined with spacer filaments in a zig-zag formation having alternating diameters for strands. The fluid flow characteristics for a 2-dimensional geometric model were resolved using the open-source program OpenFOAM by changing the Reynolds number to just before the inception of instabilities. Ratios of alternate strand diameters were also varied between one and two. Based on a detailed analysis of velocity contours, pressure distribution, wall shear stresses, and steady-state vortex systems, the research findings offer guidance for employing alternating strand design in zig-zag formation for optimum mass transfer and minimal pressure drop when accounting for concentration polarization.

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Section: Introductionmentioning

confidence: 99%