Evaporation of Water/Alumina Nanofluid Film by Mixed Convection Inside Heated Vertical Channel

Mohamed, A. Belhadj; Hdidi, Walid; Tlili, Iskander

doi:10.3390/app10072380

Cited by 4 publications

(3 citation statements)

References 31 publications

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“…Over the decades, the research on mixed convective stream and thermal energy transference in channel cavities are of fundamental interest in applied science research because of its applications in several fields [1][2][3][4][5][6][7][8][9][10]. Manca et al [11] discovered the influence of the location of a hot wall on the combined convective flow of an open cavity that exists in a channel.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Mixed Convection Flow and Energy Transfer in an Inclined Channel Cavity: Effect of Baffle Size

Sivasankaran

Janagi

2022

MCA

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The objective of the current numerical study is to explore the combined natural and forced convection and energy transport in a channel with an open cavity. An adiabatic baffle of finite length is attached to the top wall. The sinusoidal heating is implemented on the lower horizontal wall of the open cavity. The other areas of the channel cavity are treated as adiabatic. The governing equations are solved by the control volume technique for various values of relevant factors. The drag force, bulk temperature and average Nusselt number are computed. It is recognised that recirculating eddies beside the baffle become weak or disappear upon increasing the inclination angle of the channel/cavity. The average thermal energy transportation reduces steadily until the Ri = 1 and then it rises for all inclination angles and lengths of the baffle.

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Section: Introductionmentioning

confidence: 99%

Numerical Study on Mixed Convection Flow and Energy Transfer in an Inclined Channel Cavity: Effect of Baffle Size

Sivasankaran

Janagi

2022

MCA

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“…In fact, the first category of porous medium investigations is concerned with situations where the properties (porosity, permeability and thermal conductivity) of the medium are constants [6][7][8][9][10]. Moreover, the presence of nanoparticles inside a thermal application solvent is receiving increasing attention as it allows one to control the performance in terms of heat transfer and entropy [11][12][13]. Therefore, researchers are targeting the analysis of situations where the two (porous materials and nanofluids) interact.…”

Section: Introductionmentioning

confidence: 99%

Entropy Generation and MHD Convection within an Inclined Trapezoidal Heated by Triangular Fin and Filled by a Variable Porous Media

et al. 2021

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Analyses of the entropy of a thermal system that consists of an inclined trapezoidal geometry heated by a triangular fin are performed. The domain is filled by variable porosity and permeability porous materials and the working mixture is Al2O3-Cu hybrid nanofluids. The porosity is varied exponentially with the smallest distance to the nearest wall and the permeability is depending on the particle diameter. Because of using the two energy equations model (LTNEM), sources of the entropy are entropy due to the transfer of heat of the fluid phase, entropy due to the fluid friction and entropy due to the porous phase transfer of heat. A computational domain with new coordinates (ξ,η) is created and Finite Volume Method (FVM) in case of the non-orthogonal grids is used to solve the resulting system. Various simulations for different values of the inclination angle, Hartmann number and alumina-copper concentration are carried out and the outcomes are presented in terms of streamlines, temperature, fluid friction entropy and Bejan number. It is remarkable that the increase in the inclination angle causes a diminishing of the heat transfer rate. Additionally, the irreversibility due to the temperature gradients is dominant near the heated fins, regardless of the values of the Hartmann number.

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“…The significance of alumina in NF formulation has been detailed [ 13 ]. The heat and mass transfer effects through a vertical channel upon flowing alumina/water NF have been demonstrated [ 14 ]. Thermoelectric performance experiments were performed on power generation facilities and evaluated the microgeneration and heat transfer capabilities of alumina NF in the form of electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Facile Use of Silver Nanoparticles-Loaded Alumina/Silica in Nanofluid Formulations for Enhanced Catalytic Performance toward 4-Nitrophenol Reduction

Mannu¹,

Karthikeyan

Veerappa³

et al. 2021

IJERPH

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The introduction of toxic chemicals into the environment can result in water pollution leading to the degradation of biodiversity as well as human health. This study presents a new approach of using metal oxides (Al2O3 and SiO2) modified with a plasmonic metal (silver, Ag) nanoparticles (NPs)-based nanofluid (NF) formulation for environmental remediation purposes. Firstly, we prepared the Al2O3 and SiO2 NFs of different concentrations (0.2 to 2.0 weight %) by ultrasonic-assisted dispersion of Al2O3 and SiO2 NPs with water as the base fluid. The thermo-physical (viscosity, activation energy, and thermal conductivity), electrical (AC conductivity and dielectric constant) and physical (ultrasonic velocity, density, refractive index) and stability characteristics were comparatively evaluated. The Al2O3 and SiO2 NPs were then catalytically activated by loading silver NPs to obtain Al2O3/SiO2@Ag composite NPs. The catalytic reduction of 4-nitrophenol (4-NP) with Al2O3/SiO2@Ag based NFs was followed. The catalytic efficiency of Al2O3@Ag NF and SiO2@Ag NF, for the 4-NP catalysis, is compared. Based on the catalytic rate constant evaluation, the catalytic reduction efficiency for 4-NP is found to be superior for 2% weight Al2O3@Ag NF (92.9 × 10−3 s−1) as compared to the SiO2@Ag NF (29.3 × 10−3 s−1). Importantly, the enhanced catalytic efficiency of 2% weight Al2O3@Ag NF for 4-NP removal is much higher than other metal NPs based catalysts reported in the literature, signifying the importance of NF formulation-based catalysis.

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Evaporation of Water/Alumina Nanofluid Film by Mixed Convection Inside Heated Vertical Channel

Cited by 4 publications

References 31 publications

Numerical Study on Mixed Convection Flow and Energy Transfer in an Inclined Channel Cavity: Effect of Baffle Size

Numerical Study on Mixed Convection Flow and Energy Transfer in an Inclined Channel Cavity: Effect of Baffle Size

Entropy Generation and MHD Convection within an Inclined Trapezoidal Heated by Triangular Fin and Filled by a Variable Porous Media

Facile Use of Silver Nanoparticles-Loaded Alumina/Silica in Nanofluid Formulations for Enhanced Catalytic Performance toward 4-Nitrophenol Reduction

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