CFD Simulation of the Distribution of Pressure and Shear Rate on the Surface of Rotating Membrane Equipped with Vanes for the Ultrafiltration of Dairy Effluent

Ladeg, Soufyane; Zhu, Zhenzhou; Moulai‐Mostefa, Nadji; Ding, Luhui; Jaffrin, Michel Y.

doi:10.1007/s13369-017-2645-5

Cited by 9 publications

(4 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(4) A no-slip boundary condition is imposed at both walls: the velocity is zero at membrane surfaces (6) and surrounding walls (7), the velocity is equal to 2Nr in the  direction at both blade and shaft walls (5) to account for the rotation of the impeller.…”

Section: Boundary Conditionsmentioning

confidence: 99%

CFD simulation of the hydrodynamics within an RVF module in laminar regime

2023

View full text Add to dashboard Cite

The dynamic filtration module called Rotating and Vibrating Filtration (RVF) is a performant device for membrane fouling control and limiting the formation of cake layer. Indeed, it can generate strong shear stress at the membrane surface decoupled from the feeding flowrate. Moreover, the pressure fluctuation that takes place in the device is also beneficial to control membrane fouling. A CFD model has been validated in laminar regime from experimental measurements of velocity fields and pressure distribution inside the RVF. The boundary layer development at the walls were carefully studied to better explain the effects of the rotation speed and the viscosity on the spatial distribution and time variations of pressure and shear stress at the membrane surface. It appears that shear stress is more efficient than pressure to control membrane performances in laminar regime.

show abstract

Section: Boundary Conditionsmentioning

confidence: 99%

CFD simulation of the hydrodynamics within an RVF module in laminar regime

2023

View full text Add to dashboard Cite

show abstract

“…Due to the complex composition of industrial wastewater, simple solutions, emulsions and solid-liquid suspensions were preferred as test fluids. Simple solutions were used to mitigate toxic pollutants (halogenated organic compounds [39,40], 2-MIB and geosmin [41], polyvinyl alcohol [42], heavy metal ions [43,44] and sodium dodecylbenzene sulfonate [45,46]), artificial seawater (NaCl, KCl, MgCl2, CaCl2, and MgSO4) [47,48], viscous solutions (polyethylene glycol-6000 [49][50][51], carboxymethyl cellulose [52], ethanol [53]), soluble salts (CaSO4 [54], NaCl [55]), model wastewater in dairy process [56][57][58][59][60][61][62] and space mission [63]. For emulsion, oil/water mixtures with surfactants were considered [64][65][66][67][68][69][70].…”

Section: Water Treatmentmentioning

confidence: 99%

“…Most of the works reported qualitative performances (flux, steady-state flux, hydronic resistance, concentration factor, volume reduction ratio, rejection rate, concentration polarization) to establish the empirical correlations (flux versus shear rate/ shear stress). Computational fluid dynamics [47,55,61,73,84,89] was used to simulate local and global performances (shear rate/ shear stress, flux) within the filtration cell and membrane surface. Only one article used PIV (particle image velocimetry) [71] to examine the local hydrodynamics and compared it with the filtration performances.…”

Section: Water Treatmentmentioning

confidence: 99%