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Falling film evaporation on a thermal spray metal coated vertical corrugated plate conduits
Published in Taylor and Francis Inc.
2017
Volume: 23
   
Issue: 6
Pages: 875 - 883
Abstract
In falling film evaporation process, the heat is transferred from the condensing fluid side to the liquid flowing on evaporating side. Tube geometry and tube size have an important role on the performance of the falling film evaporators. The current article presents a two-dimensional computational fluid dynamics study of water falling film evaporation on a thermal spray metal coated vertical corrugated conduits. Two-phase flow simulation is carried out by using a finite volume method-based commercial software, using k-ω equations with shear stress transport. Sinusoidal corrugations with different porosity have been selected for this study. Heat and mass transfer during falling film evaporation are included through user defined functions. Effect of Reynolds number, wall superheat, and surface roughness on heat transfer coefficient is presented. Numerical results are compared with the results of horizontal circular tube, as well as corrugated plate conduits falling film evaporation from literature. An enhancement of film heat transfer coefficient of about 15% is observed for the vertical corrugated plate conduits. Copyright © 2017 ASHRAE.
About the journal
JournalData powered by TypesetScience and Technology for the Built Environment
PublisherData powered by TypesetTaylor and Francis Inc.
ISSN23744731
Open AccessYes
Concepts (21)
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    Computational fluid dynamics
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    Computer software
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    Evaporation
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    Finite volume method
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    Heat transfer
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    Heat transfer coefficients
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    MASS TRANSFER
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    Metal coatings
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    Plate metal
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    Reynolds number
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    Shear flow
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    Surface roughness
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    Commercial software
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    CORRUGATED PLATE
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    FALLING FILM EVAPORATORS
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    FALLING-FILM EVAPORATION
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    Heat and mass transfer
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    Numerical results
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    SHEAR-STRESS TRANSPORT
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    User defined functions
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    Corrugated metal