A study of mixed convection heat transfer with condensation from a parallel plate channel

Giri, Asis; Bhuyan, Dipanka; Das, Biplab

doi:10.1016/j.ijthermalsci.2015.07.012

Cited by 15 publications

(13 citation statements)

References 28 publications

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“…. The results presented in this figure show the good agreement compared with the results of Asis Giri et al[3].…”

supporting

confidence: 88%

“…To validate this code a series of test were compared with experimental data of Lebedev et al [2] and numerical results of Asis Giri et al [3]. The first comparison is based on the experimental data of Lebedeve et al [2] in the case of heat and mass transfer in vapor condensation of humid air along a rectangular channel with 20 of wide, 150 of high, 600…”

Section: Comparisons With Previous Workmentioning

confidence: 99%

“…The second comparison is presented in Figure 4 which illustrates the dimensionless condensate film profiles throughout the channel. Asis Giri et al [3] studied the condensation in a vertical channel with: length = 0.75 , half-width = 0.005 , an inlet temperature = 60 ∘ C, and temperature of the wall = 30 ∘ C; the air-vapor mixture is entered with 100% of humidity at different number of inlet Reynolds and inlet pressure as mentioned in Figure 4…”

Section: Comparisons With Previous Workmentioning

confidence: 99%

“…The numerical simulation for the case of laminar liquid film condensation from a gas-vapor mixture in vertical channels has been discussed by [3,[11][12][13]. Siow et al [11,12] modelled steady film laminar condensation from an air-water mixture and used a coupled implicit numerical approach to solve problems with a wide range of inlet concentration of air examined as a NCG.…”

Section: Introductionmentioning

confidence: 99%

“…The vapor density was used instead of the mass fraction of gas in their equations because, in condensation with a high gas mass concentration, the important and determining parameter is the variation of inlet relative humidity. Asis Giri et al [3] studied a mixed convective heat transfer between two parallel walls using governing equation for both mixture phase and liquid phase under simultaneous heat and mass transfer representing the case of condensation on a parallel plate. A good agreement was found with the experimental data and numerical results.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Numerical Analysis of Laminar Convective Condensation with the Presence of Noncondensable Gas Flowing Downward in a Vertical Channel

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Hammami²,

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et al. 2019

Mathematical Problems in Engineering

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The purpose of this paper is to study and perform a numerical analysis of the simultaneous processes of mass and heat transfer during the condensation process of a steam in the existence of noncondensable gas (NCG) inside a descending vertical channel. In this study, the flow of the vapor-air mixture is laminar and the saturation conditions are prevailing at the inlet of the channel. The coupled control equations for liquid film, interfacial conditions, and mixture flow are solved together using the approach of finite volume. Detailed and valuable results are presented both in the liquid condensate film and in the mixing regions. These detailed results contain the dimensionless velocity and dimensionless temperature profiles in both phases, the dimensionless mass fraction of vapor, the axial variation of the dimensionless thickness of the film liquid δ⁎, and the accumulated condensate rate Mr as well the local Nusselt number Nuy. The relative humidity at the inlet varies from 60% to 100% and the inlet temperature from 40°C to 80°C. The results confirm that a decrease in the mass concentration of NCG by the increasing the inlet relative humidity has a direct influence on the liquid film layer, the local number of Nusselt, and the variation of condensation rate accumulated through the channel. The results also designate that an increase of the inlet relative humidity and the inlet temperature ameliorates the condensation process. The comparison made for the coefficient of heat transfer due to condensation process and the condensate liquid film thickness with the literature results is in good concordance which gives more credibility to our calculation model.

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“…. The results presented in this figure show the good agreement compared with the results of Asis Giri et al[3].…”

supporting

confidence: 88%