2005
DOI: 10.1021/ie050855q
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Effect of Interfacial Velocity Fluctuations on the Enhancement of the Mass-Transfer Process in Falling-Film Flow

Abstract: To investigate the relationship between surface instability and mass-transport behavior, a laser Doppler anemometer (LDA) system was used to measure the liquid velocity components in a falling film, even very close to the liquid surface. The experimental results show that the presence of countercurrent gas flow tends to reduce and flatten the liquid velocity in the surface region and that the maximum liquid velocity might occur at some distance from the interface. The fluctuating liquid velocity field shows a … Show more

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Cited by 32 publications
(36 citation statements)
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“…In addition, the higher drag force further reduces the velocity at the interface so that a change in the velocity profile in the water film is more evident, where the maximum velocity does not appear at the interface but at a position underneath the gas-liquid surface. This is also in accordance with the experimental investigations in [19]. …”
Section: Film Flowsupporting
confidence: 93%
“…In addition, the higher drag force further reduces the velocity at the interface so that a change in the velocity profile in the water film is more evident, where the maximum velocity does not appear at the interface but at a position underneath the gas-liquid surface. This is also in accordance with the experimental investigations in [19]. …”
Section: Film Flowsupporting
confidence: 93%
“…6 also shows that the simulation results are a little underestimated in comparison to the experimental data. As mentioned above, one explanation for this could be that adopting the penetration theory to determine the mass transfer coefficient results in underestimation of the true value, which has been also pointed out by Yu et al [33]. As a general conclusion, it should be highlighted that the developed model supplies an adequate basis for the investigation of mass transfer on real packing segments, as a next step.…”
Section: Outlet Concentrationmentioning
confidence: 81%
“…to different liquid properties, countercurrent flow and wave characteristics (Won and Mills, 1982;Yih and Chen, 1982;Alekseenko et al, 1994;Roberts and Chang, 2000;Park and Nosoko, 2003;Yu et al, 2006;Xu et al, 2008;Paschke et al, 2009), but mass transfer experiments for film flow on grooved surfaces are published less often.…”
Section: Fluid Dynamics and Mass Transfer On Textured Surfacesmentioning
confidence: 99%