Cocurrent turbulent mixed convection heat and mass transfer in falling film of water inside a vertical heated tube

Feddaoui, M’barek; Mir, A.; Belahmidi, El Mustapha

doi:10.1016/s0017-9310(03)00129-7

Cited by 53 publications

(41 citation statements)

References 25 publications

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“…The thermophysical properties of air are depending on temperature and water vapor mass fraction. Their calculation can be found in the work of Feddaoui et al,2003. It is assumed that: -The radial pressure gradient component is neglected, -Dufour and Soret effects are neglected, -Transfers are two-dimensional steady state and axisymmetric, -The air is considered as an ideal gas. The dimensionless equations which govern the simultaneous heat and mass transfer by forced convection in the venturi are:…”

Section: Problem Formulationmentioning

confidence: 99%

Laminar Forced Convection Heat and Mass Transfer in a Venturi Tube With Wetted Walls

Igo¹,

Bathiébo²,

Palm³

et al. 2011

Frontiers in Heat and Mass Transfer

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A combined heat and mass transfer in laminar forced convection flow in a rectangular venturi tube have been numerically simulated. A transformation has been used to transform the irregular profile of the venturi walls into a straight line. Transfers equations are solved using finite volume method, Gauss and Thomas algorithms. The influences of venturi effect, inlet Reynolds number and venturi diameter ratio on the heat and mass transfer are discussed in detail. Results presented as pressure gradient, Nusselt and Sherwood numbers profiles, velocity patterns and isotherms show that the throat play an important role on the heat an mass transfer in the venturi channel.

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Section: Problem Formulationmentioning

confidence: 99%

Laminar Forced Convection Heat and Mass Transfer in a Venturi Tube With Wetted Walls

Igo¹,

Bathiébo²,

Palm³

et al. 2011

Frontiers in Heat and Mass Transfer

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show abstract

“…The authors defined the convenient conditions to establish each cooling mode. To understand the combined buoyancy effects of thermal and mass diffusion on the turbulent mixed convection flows inside a tube, Feddaoui et al [8] have conducted a detailed numerical study reporting the best conditions to have a better heat transfer, precisely, a higher gas flow Reynolds number, a higher heat flux, or a lower inlet water flow. Feddaoui et al [8,9] extended many of the previous studies of Yan and his coworkers.…”

Section: Introductionmentioning

confidence: 99%

Computational Study of Liquid Film Evaporation along a Wavy Wall of a Vertical Channel

Najim

Feddaoui

Alla

et al. 2018

Mathematical Problems in Engineering

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A numerical study of mixed convection heat and mass transfer along a vertical channel with a wavy wall is performed. The wavy wall is heated by a constant flux, while the other is adiabatic. The discretisation of equations in both liquid and gas phases is realised using an implicit finite difference scheme. Results of simulation compare the effect of multiple parameters, especially amplitude and characteristic length of the curve, on the liquid film evaporation process. The results indicate that heat and mass transfer is enhanced by increasing the amplitude and number of wall waves. Moreover, a very small value of waves amplitude of the wall may reduce the sensible heat and mass transfer.

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“…They observed that the evaporative cooling disturbs considerably the velocity and temperature profiles in particular near the exit section of the channel. Feddaoui et al (2001Feddaoui et al ( , 2003b studied the thermal transfer taking place in the event of film evaporation in the presence of a gas flow inside a vertical heated tube. They reported that the evaporation is improved for a system with higher heat flux and smaller inlet liquid film.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Heat and Mass Transfer in the Evaporation of Glycols Liquid Film along an Insulated Vertical Channel

Alla¹,

Feddaoui²,

Meftah³

2015

AJHMT

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A numerical study is reported to investigate the evaporation in mixed convection of a pure glycol liquid film such as ethylene and propylene glycol. The model solves the coupled governing equations in both phases together with the boundary and interfacial conditions. The systems of equations obtained by using an implicit finite difference method are solved by TDMA method. The influence of inlet temperature of liquid film and inlet pressure in the gas flow are examined. The results indicate that the propylene glycol evaporates in more intense way in comparison to ethylene glycol, due to the volatility difference. Additionally, In the operating system, the heat transfer by sensible mode is more important than latent mode.

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Cocurrent turbulent mixed convection heat and mass transfer in falling film of water inside a vertical heated tube

Cited by 53 publications

References 25 publications

Laminar Forced Convection Heat and Mass Transfer in a Venturi Tube With Wetted Walls

Laminar Forced Convection Heat and Mass Transfer in a Venturi Tube With Wetted Walls

Computational Study of Liquid Film Evaporation along a Wavy Wall of a Vertical Channel

Numerical Simulation of Heat and Mass Transfer in the Evaporation of Glycols Liquid Film along an Insulated Vertical Channel

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