Numerical Study of Thin Film Condensation in Forced Convection of Saturated Vapor on a Vertical Wall Covered with a Porous Material

Ndiaye, Momath; Ndiaye, Goumbo; Sene, Madialène

doi:10.4236/jectc.2022.111001

Cited by 1 publication

(6 citation statements)

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“…We remark a slight superiority of the dimensionless longitudinal velocity of our study (compared to the model of Ndiaye M. et al [4][5][6], which is due to the inertial effects that we have taken into account in the porous medium which are not predominant in our case ( because Re = 2, Re is weak) (Fig. 2).…”

Section: Model Validationcontrasting

confidence: 46%

“…2: Comparison of the velocity profile of our study with that of Ndiaye M. et al [4][5][6] Re=2; Fr=10 -4 ; λ * =2.9; H * =2.10 -3 ; Ja=10 -3 ; ν * =1; L/A=1; Da=10 12 ; Ɛ=0.4; F=0.55 Fig. 3: Comparison of the temperature profile of our study with that of Ndiaye M. et al [4][5][6] Re=2; Fr=10 -4 ; λ * =2.9; H * =2.10 -3 ; Ja=10 -3 ; ν * =1; L/A=1; Da=10 12 ; ; Ɛ=0.4; F=0.55…”

Section: Model Validationmentioning

confidence: 78%

“…The results of our calculation model have been validated in comparison with the work of Ndiaye and al. [4][5][6]. This comparison is made by taking low Reynolds number (Re = 2) because Ndiaye M. had retained that his model was only valid for values of the Reynolds number less than 7.…”

Section: Model Validationmentioning

confidence: 99%

“…The condensation of vapor in a porous medium has received great interest in many theoretical and experimental researches [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Shekarriz and Plumb [1] analyzed the influence of the presence of the porous medium on the condensation of a film on the external wall of a horizontal tube.…”

Section: Introductionmentioning

confidence: 99%

“…These authors, by comparing the Darcy-Brinkman (DB) model and the Darcy-Brinkman-Forchheimer (DBF) model, presented the velocity and temperature profiles in the porous layer, the thickness of the liquid film, the local Nusselt number and the influence of Reynolds and Darcy numbers, the dimensionless thickness of the porous layer. A numerical study model of the condensation of pure saturated vapor of thin film type in forced convection on a wall covered with porous material was proposed by Ndiaye M. et al [4][5][6]. The influences of the Prandtl, Froude, Reynolds and Jacob numbers, the dimensionless thickness of the porous layer and the thermal conductivity ratio on the transfers in porous medium and in liquid phase were analysed.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Study of Thin Film Condensation in Forced Convection in a Canal Whose Walls Are Covered with a Porous Material: Influence of ratio of form-Determination of Lengths of Entry

2022

JCBSC

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The forced convection thin film type condensation of pure saturated vapor in a channel whose walls are covered with a porous material is studied numerically. To describe the flow, in the porous medium the generalized model of Darcy-Brinkman-Forchheimer (DBF) is used while the classical equations of the boundary layer have been exploited in pure liquid. These equations thus rendered dimensionless, are solved by an implicit finite difference method and the iterative Gauss-Seidel sub-relaxation method. We note that an increase in the ratio of form (or length of the cold plate) allows better contact with the cold plate, increases the friction imposed by this porous wall and allows a decrease in velocity and temperatures in the porous medium and the pure liquid. It also causes an increase in the thickness of the liquid film (favored condensation), decreases the rate of heat transfer at the porous medium / liquid film interface and the lengths of entry. This decrease in lengths of entry is exponential and very significant when the ratio of form is between 55 and 100 (55≤L/A≤100). We conclude that the sensitivity of condensation to a change in ratio of form is very high between 55 and 100.

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Section: Model Validationcontrasting

confidence: 46%