Experimental and numerical characterization of the water flow in spacer-filled channels of spiral-wound membranes
Microsoft Word 2007
Valladares Linares, Rodrigo
Marston, Jeremy O.
Radu, Andrea I.
Vrouwenvelder, Johannes S.
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Environmental Science and Engineering Program
Water Desalination and Reuse Research Center (WDRC)
Online Publication Date2015-09-25
Print Publication Date2015-12
Permanent link to this recordhttp://hdl.handle.net/10754/578847
MetadataShow full item record
AbstractMicro-scale flow distribution in spacer-filled flow channels of spiral-wound membrane modules was determined with a particle image velocimetry system (PIV), aiming to elucidate the flow behaviour in spacer-filled flow channels. Two-dimensional water velocity fields were measured in a flow cell (representing the feed spacer-filled flow channel of a spiral wound reverse osmosis membrane module without permeate production) at several planes throughout the channel height. At linear flow velocities (volumetric flow rate per cross-section of the flow channel considering the channel porosity, also described as crossflow velocities) used in practice (0.074 and 0.163 m∙s-1) the recorded flow was laminar with only slight unsteadiness in the upper velocity limit. At higher linear flow velocity (0.3 m∙s-1) the flow was observed to be unsteady and with recirculation zones. Measurements made at different locations in the flow cell exhibited very similar flow patterns within all feed spacer mesh elements, thus revealing the same hydrodynamic conditions along the length of the flow channel. Three-dimensional (3-D) computational fluid dynamics simulations were performed using the same geometries and flow parameters as the experiments, based on steady laminar flow assumption. The numerical results were in good agreement (0.85-0.95 Bray-Curtis similarity) with the measured flow fields at linear velocities of 0.074 and 0.163 m∙s-1, thus supporting the use of model-based studies in the optimization of feed spacer geometries and operational conditions of spiral wound membrane systems.
CitationExperimental and numerical characterization of the water flow in spacer-filled channels of spiral-wound membranes 2015 Water Research
- Porosity of spacer-filled channels in spiral-wound membrane systems: Quantification methods and impact on hydraulic characterization.
- Authors: Siddiqui A, Lehmann S, Haaksman V, Ogier J, Schellenberg C, van Loosdrecht MCM, Kruithof JC, Vrouwenvelder JS
- Issue date: 2017 Aug 1
- Development and characterization of 3D-printed feed spacers for spiral wound membrane systems.
- Authors: Siddiqui A, Farhat N, Bucs SS, Linares RV, Picioreanu C, Kruithof JC, van Loosdrecht MC, Kidwell J, Vrouwenvelder JS
- Issue date: 2016 Mar 15
- Impact of organic nutrient load on biomass accumulation, feed channel pressure drop increase and permeate flux decline in membrane systems.
- Authors: Bucs SS, Valladares Linares R, van Loosdrecht MC, Kruithof JC, Vrouwenvelder JS
- Issue date: 2014 Dec 15
- Spacer geometry and particle deposition in spiral wound membrane feed channels.
- Authors: Radu AI, van Steen MSH, Vrouwenvelder JS, van Loosdrecht MCM, Picioreanu C
- Issue date: 2014 Nov 1
- Visualization of hydraulic conditions inside the feed channel of Reverse Osmosis: A practical comparison of velocity between empty and spacer-filled channel.
- Authors: Haidari AH, Heijman SGJ, van der Meer WGJ
- Issue date: 2016 Dec 1