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Numerical Modelling of Braiding and Meandering Instabilities in Gravity-Driven Liquid Rivulets

Sebastia Saez, Juan Daniel, Reina, Tomas Ramirez and Arellano-Garcia, Harvey (2017) Numerical Modelling of Braiding and Meandering Instabilities in Gravity-Driven Liquid Rivulets Chemie Ingenieur Technik, 89 (11). pp. 1-9.

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Abstract

Rivulet instabilities appear in many engineering applications. In absorption equipment, they affect the interface area available for mass transfer, and thus, reducing the efficiency. Here, computational fluid dynamics are used to reproduce the meanders and braids in rivulets flowing down an inclined channel. Fast oscillations of the meander (f = 5.6 Hz) are observed at low flow rates. At greater flow rates, an analysis of the transversal velocity in the retraction waves shows the effect of the surface tension, which causes the braiding phenomenon, and thus, the reduction in gas-liquid interface area.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
NameEmailORCID
Sebastia Saez, Juan Danielj.sebastiasaez@surrey.ac.ukUNSPECIFIED
Reina, Tomas RamirezUNSPECIFIEDUNSPECIFIED
Arellano-Garcia, Harveyh.arellano-garcia@surrey.ac.ukUNSPECIFIED
Date : 12 October 2017
Funders : Engineering and Physical Sciences Research Council (EPSRC)
Identification Number : 10.1002/cite.201700034
Copyright Disclaimer : Copyright © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the peer-reviewed version of the following article: Sebastia Saez, Reina & Arellano-Garcia - 'Numerical Modelling of Braiding and Meandering Instabilities in Gravity-Driven Liquid Rivulets', in Chemie Ingenieur Technik 89 (11) which has been published in final form at https://doi.org/10.1002/cite.201700034. This article may be used for non-commercial purposes in accordance with Wiley-VCH Terms and Conditions for Self-Archiving.
Uncontrolled Keywords : Computational fluid dynamics; Multiphase modelling; Navier-Stokes equations; Rivulet flow
Depositing User : Clive Harris
Date Deposited : 12 Oct 2017 14:24
Last Modified : 12 Oct 2017 14:24
URI: http://epubs.surrey.ac.uk/id/eprint/842533

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