Laminar flow in radial flow cell with small aspect ratios: Numerical and experimental study

Detry, Jean; Deroanne, Claude; Sindic, Marianne; Jensen, Bo Boye Busk

doi:10.1016/j.ces.2008.09.008

Cited by 20 publications

(21 citation statements)

References 35 publications

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“…A sketch of the RFC is presented in Fig. 2; a complete description of the device and of its hydrodynamics can be found elsewhere [19,20]. Up to flow rates of 20 ml/min, the flow is laminar.…”

Section: Cleaning Soiled Samplesmentioning

confidence: 99%

“…Pictures of the soiled surface were taken in epifluorescence with a ZX9 stereomicroscope (Olympus, Belgium; 10 Â 10 magnification) equipped with a CCD camera, a mercury vapor UV lamp (100 W, emission range 100-800 nm) and UV filters (passing bands: excitation 460-490 nm, emission >520 nm). Then, the upper disk of the RFC was placed and the sample was exposed to a sequence of flow rates (20,40,65,90,140,190 and 390 ml/ min), each flow rate being applied for 5 min. Unless stated otherwise, the samples were placed in the RFC and submitted immediately to the flow rate sequence.…”

Section: Cleaning Soiled Samplesmentioning

confidence: 99%

See 1 more Smart Citation

Physico-chemical mechanisms governing the adherence of starch granules on materials with different hydrophobicities

Detry

Sindic

Servais

et al. 2011

Journal of Colloid and Interface Science

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Section: Cleaning Soiled Samplesmentioning

confidence: 99%

Section: Cleaning Soiled Samplesmentioning

confidence: 99%

Physico-chemical mechanisms governing the adherence of starch granules on materials with different hydrophobicities

Detry

Sindic

Servais

et al. 2011

Journal of Colloid and Interface Science

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“…The distance between the upper disk and both the sample and the lower disk was set by three adjustable micrometric screws and controlled to be 1.00±0.02 mm with calibrated steel spacers. A complete description of the device and of its hydrodynamics can be found elsewhere (Detry et al, 2009b). The cleaning fluid used was distilled water and cleaning was performed at 20°C at controlled flow rates (40 or 390 ml/min) for 5 min.…”

Section: Cleaning Experimentsmentioning

confidence: 99%

Conditioning materials with biomacromolecules: Composition of the adlayer and influence on cleanability

Toure

Genet

Dupont‐Gillain

et al. 2014

Journal of Colloid and Interface Science

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AbbreviationsBSA: bovine serum albumin RFC: radial flow cell XPS: X-ray photoelectron spectroscopy 2 ABSTRACTThe influence of substrate hydrophobicity and biomacromolecules (dextran, bovine serum albumin -BSA) adsorption on the cleanability of surfaces soiled by spraying aqueous suspensions of quartz particles (10 to 30 µm size), then dried, was investigated using glass and polystyrene as substrates. The cleanability was evaluated using radial flow cell (RFC).The surface composition was determined by X-ray photoelectron spectroscopy (XPS). The interpretation of XPS data allowed the complexity due to the ubiquitous presence of organic contaminants to be coped with, and the surface composition to be expressed in terms of both the amount of adlayer and the mass concentration of adlayer constituents.When soiled with a suspension of particles in water, glass was much less cleanable than polystyrene, which was attributed to its much lower water contact angle, in agreement with previous observations on starch soil. Dextran was easily desorbed and did not affect the cleanability. The presence of BSA at the interface strongly improved the cleanability of glass while the contact angle did not change appreciably. In contrast, soiling polystyrene with quartz particles suspended in a BSA solution instead of water did not change markedly the cleanability, while the contact angle was much lower and the aggregates of soiling particles were more flat. These observations are explained by the major role of capillary forces developed upon drying, which influence the closeness of the contact between the soiling particles and the substrate and, thereby, the adherence of particles. The capillary forces are proportional to the liquid surface tension and depend in a more complex way on contact angles of the particles and of the substrate. The dependence of cleanability on capillary forces, and in particular on the liquid surface tension, is predominant as compared with its dependence on the size and shape of the soiling aggregates, which influence the efficiency of shear forces exerted by the flowing water upon cleaning.

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“…The conversion of critical detachment radius into critical wall shear stress may be biased when the adhering aggregate height is not negligible with respect to the channel height and when the adherence is such that flow rates above 20 ml/min are required (Detry et al 2007(Detry et al , 2009. Therefore, the results of the present study are expressed only in terms of critical detachment radius, keeping in mind that, for a defined flow rate, its increase reveals a decrease of the adherence.…”

Section: Soiling Procedures and Cleanability Assessmentmentioning

confidence: 93%

Influence of substrate nature and β-lactoglobulin on cleanability after soiling by suspension spraying and drying

Toure

Sindic

Dupont‐Gillain

et al. 2015

Chemical Engineering Science

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Laminar flow in radial flow cell with small aspect ratios: Numerical and experimental study

Cited by 20 publications

References 35 publications

Physico-chemical mechanisms governing the adherence of starch granules on materials with different hydrophobicities

Physico-chemical mechanisms governing the adherence of starch granules on materials with different hydrophobicities

Conditioning materials with biomacromolecules: Composition of the adlayer and influence on cleanability

Influence of substrate nature and β-lactoglobulin on cleanability after soiling by suspension spraying and drying

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