Comparison of two configurations to improve heat and mass transfer in evaporating two-component liquid film flow

Alla, Abderrahman Nait; Feddaoui, M’barek; Meftah, Hicham

doi:10.1016/j.ijthermalsci.2017.12.031

Cited by 14 publications

(5 citation statements)

References 23 publications

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“…Several researchers have attempted to validate their experimental and numerical results to these diverse models. [54,55] This study has a primary objective of comparing experimental results with analytical and numerical models of composite thermal conductivity. To achieve this, a steady-state conduction heat transfer problem was solved through a two-dimensional numerical simulation using the finite element method.…”

Section: Numerical Analysismentioning

confidence: 99%

Modeling effective elastic and thermal conductivity of composite materials reinforced with plastic waste: Analytical and numerical approaches

et al. 2023

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The properties of materials used in building are enhanced by adding nanoparticles for improve energy efficiency. The objective of this study is to offer both numerical and analytical modeling methods of the thermal conductivity and mechanical property of composite materials. Various mineral charges were employed to reinforce the organic matrices of saturated polyester resin (UPR) with calcium carbonate (CaCo3) and expanded perlite particles. The study employs the finite‐element software COMSOL to conduct a numerical investigation of thermal transport in an elementary cell. The purpose is to ascertain the thermal conductivity of composites and examine the impact of contact resistance and the volume fraction of nanoparticles on the effective thermal conductivity. The results indicate that the numerical model proposed is consistent with the Hashin‐Shtrikman analytical model and experimental measurements. In another hand, the mechanical property is computed based on Mori‐tanaka analytical model of homogenization and finite element method by Digimat‐MF/FE, which gives enhanced elastic behavior of composite in function of volume fraction of nanoparticles, with high Young modulus and low Poisson ratio. The results indicate the performance of nanoparticles in improving thermomechanical behavior of building materials, and also in other applications.

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Section: Numerical Analysismentioning

confidence: 99%

Modeling effective elastic and thermal conductivity of composite materials reinforced with plastic waste: Analytical and numerical approaches

et al. 2023

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“…To solve the equations governing the flow of liquid and gas, we make the simplifying assumptions cited by Nait Alla et al 18,19,29 The equations governing simultaneous heat and mass transfers from the liquid phase for each component i (i = 1 for water, i = 2 for methanol, and i = 3 for benzene) are as follows:…”

Section: Equations In the Liquid Filmmentioning

confidence: 99%

“…The authors have widely studied the evaporation of the pure liquid film along with computational studies of binary liquid films. [22][23][24][25][26][27][28][29][30][31][32] Nevertheless, the case of the evaporation of multicomponent liquid films in a channel does not have many theoretical and experimental investigations. [33][34] So far, numerous research articles have been conducted on the evaporation of pure liquid film.…”

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confidence: 99%

“…In a similar way, Cherif and Daif, 25 Nasr et al, 27 and Debbissi et al 28 showed that the evaporation by mixed convection of ethylene glycol in a binary mixture increases with the increase in the ethylene glycol content at the inlet of the channel. Nait Alla et al 29 treated numerically two modes of heating of vertical channel walls by analyzing the evaporation of a binary liquid film (water-ethanol). The result indicated that preheating the film before entering the channel is the best option for obtaining a better average evaporated mass flux.…”

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confidence: 99%

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Falling film evaporation of ternary mixture under three different modes of heating

2021

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This numerical study deals with heat and mass transfer by evaporation under mixed convection in three different configurations of a ternary liquid film in a vertical channel. The ternary liquid mixture watermethanol-benzene falls along the right plate of channel while the other plate is kept thermally insulated. In the first configuration, a heat flux density is applied to the wall carrying the trickle film, while in the other configurations this same amount of heat is used to preheat the liquid film or the air at the inlet of the channel. The implicit finite difference scheme is used to solve the system of equations in both liquid and vapor phases.According to this study, it was observed that the evaporation efficiency is high when the mass fraction of volatile components is high or in the preheating state of ternary film.

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“…Flow visualizations were plotted to understand the results. Two different configurations were numerically investigated [16]. In one configuration, a uniform heat flux was applied to a wet wall, while in the second configuration, the same heat flux preheated the liquid at the inlet.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Temperature and Air Velocity Distribution in a Rectangular Cavity with Insulated Side Walls

Adeleye,

Oni,

Oluwaleye

2023

IJHT

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Heat transfer and fluid flow in cavities is often a result of convection. The study of convection in enclosures, such as rectangular cavities, under different parameters, holds significance in understanding the thermal-hydraulic characteristics, like temperature and air velocity distribution, in systems where heat transfer and fluid flow are involved. This research focuses on the numerical investigation of temperature and air velocity distribution in a rectangular cavity. COMSOL Multiphysics software was utilized to create a model of the cavity, subjecting it to regulated temperatures of 323.0 K, 333.0 K, and 343.0 K at operating times of 0, 300, 900, and 1,500 seconds. The cavity's bottom wall was heated by a heater, and the inner sides of the right and left walls were insulated using fiberglass. The findings from the research indicate that at an operating time of 900 seconds, the maximum air velocities recorded were 0.06, 0.06, 0.03, and 0.10 m/s at the left wall, right wall, bottom, and top of the cavity respectively. Beyond 900 seconds of operation, the air velocities remained constant. Furthermore, at 900 seconds of operation, the maximum isotherms at the regulated temperatures of 323.0 K, 333.0 K, and 343.0 K were approximately equal to their respective temperatures, but they precisely equaled the regulated temperatures at an operating time of 1,500 seconds. The results of this research can be applied to various areas that involve heat and fluid flow, including heat exchangers, building design for energy efficiency, solar systems, nuclear reactor operations, microelectronic component cooling, energy storage, heating devices, and refrigeration systems.

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Comparison of two configurations to improve heat and mass transfer in evaporating two-component liquid film flow

Cited by 14 publications

References 23 publications

Modeling effective elastic and thermal conductivity of composite materials reinforced with plastic waste: Analytical and numerical approaches

Modeling effective elastic and thermal conductivity of composite materials reinforced with plastic waste: Analytical and numerical approaches

Falling film evaporation of ternary mixture under three different modes of heating

Numerical Investigation of Temperature and Air Velocity Distribution in a Rectangular Cavity with Insulated Side Walls

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