Modeling of surface fouling on the surface of a rotating disk membrane using CFD and numerical study

Ladeg, Soufyane; Moulai‐Mostefa, Nadji; Ould-Dris, Aïssa; Ding, Luhui

doi:10.5004/dwt.2020.25699

Cited by 3 publications

(1 citation statement)

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“…Moreover, the fluid flow prediction using modern CFD software can unveil many features of dynamic flow, heat and mass transfer, chemical reactions, and many other related physico-chemical phenomena by solving a set of complicated mathematical equations [16,17]. Recently, CFD was used by Ladeg et al, [18] in order to model the thickness of the cake layer produced by clogging on the membrane surface; it was found that in the case of tangential filtration, the cake layer thickness is highly dependent on pressure and shear stress values. To assess the hydrodynamic efficiency, reactor shape configuration, and impeller design, Ding et al, [16] used CFD to simulate a gas-liquid flow inside a stirred-tank reactor in the laboratory scale.…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation of Laminar Rotating Flow Inside a Membrane Filter Vessel

Ladeg

Moulai‐Mostefa²,

Ding³

2023

ARFMTS

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In this study, computational fluid dynamics (CFD) was used to simulate a steady-state rotating flow inside a filtration system. The shape of a 3-D vessel was designed and then meshed using ANSYS design modular (DM) and workbench mesh. The laminar viscous regime was employed; it was identified using the Reynolds number formula. As a boundary layer, the zero inlet velocity and atmospheric pressure were imposed on the inlet boundary. The obtained results showed that for a rotating velocity of 50 rpm, the shear stress distribution on the membrane surface is extremely low, except for four narrow regions situated between the extremities of the impeller and the vessel wall. The pressure variation versus z axes, below the impeller, was almost constant, and it was unevenly distributed on the membrane surface, with two areas of negative pressure. The velocity values below the impeller were higher than those above. This study provides good insights that suggest designing the impeller shape under the most extreme conditions (rotating velocity, flow regime, and pressure inlet) of the membrane. The filtration process will be performed in a future study.

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