Computational study of evaporating nanofluids film along a vertical channel by the two-phase model

Najim, Monssif; Feddaoui, M’barek; Alla, Abderrahman Nait; Charef, Adil

doi:10.1016/j.ijmecsci.2018.12.042

Cited by 11 publications

(4 citation statements)

References 42 publications

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“…The increase in nanoparticle concentration increases the temperature. 56 Droplets of higher particle concentration have greater surface tension, and so they require a greater amount of heat for vaporization; therefore, disintegration is adversely affected because of a delay in the vaporization process caused by an increase in nanoparticle concentration. 57 Variations in the nanoparticle size greatly influence the enthalpy of evaporation of nanofluids.…”

Section: Ll Open Accessmentioning

confidence: 99%

Nano-engineered pathways for advanced thermal energy storage systems

Alagumalai¹,

Yang

Ding

et al. 2022

Cell Reports Physical Science

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Section: Ll Open Accessmentioning

confidence: 99%

Nano-engineered pathways for advanced thermal energy storage systems

Alagumalai¹,

Yang

Ding

et al. 2022

Cell Reports Physical Science

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“…According to the obtained results, the increase in the amplitude and number of waves of the wall causes an enhancement in heat and mass transfer. Recently, Najim et al [25][26][27] have conducted numerical studies on nanofluid liquid film evaporation in vertical channels.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of effective parameters of falling film evaporation in a vertical‐tube evaporator

Haghsheno

Kouhikamali

2020

Heat Trans

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Wastewater treatment is one of the most effective solutions to manage the problem of water scarcity. Falling film evaporators are excellent technology in wastewater treatment plants. These wastewater evaporators provide high heat transfer, short residence time in the heating zone, and high‐purity distilled water. In the present study, the mechanism of turbulent falling film evaporation in a vertical tube has been investigated. A model has been developed for symmetrical two‐dimensional pure and saline water flow in a vertical tube under constant wall heat flux. The numerical simulation has been carried out by a commercial computational fluid dynamics code. The evaporation of saturated liquid film is simulated utilizing a two‐phase volume of fluid method and Tanasawa phase‐change model. The main objective of this study is to evaluate the effects of water salinity, liquid Reynolds number, wall heat flux, and liquid film thickness on the two‐phase heat transfer coefficient and vapor volume fraction. The numerical heat transfer coefficients are compared with the obtained results by Chen's empirical correlation. With a MAPE ≤ 11%, this study proves that the numerical method is highly effective at predicting the heat transfer coefficient. Moreover, the empirical coefficient of the Tanasawa model and the minimum thickness of the falling film are determined.

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“…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.…”

mentioning

confidence: 99%

“…Recently, Najim et al 31 studied the intensification of heat and mass exchange in evaporating liquid film with nanoparticles using two-phase approach nanofluids modeling. A comparison between the two studied nanoparticles is performed to obtain the suitable nanofluid.…”

mentioning

confidence: 99%

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

2021

Self Cite

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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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Computational study of evaporating nanofluids film along a vertical channel by the two-phase model

Cited by 11 publications

References 42 publications

Nano-engineered pathways for advanced thermal energy storage systems

Nano-engineered pathways for advanced thermal energy storage systems

Numerical investigation of effective parameters of falling film evaporation in a vertical‐tube evaporator

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

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