Natural convection heat transfer for adiabatic circular cylinder inside trapezoidal enclosure filled with nanofluid superposed porous-nanofluid layer

Isam, Abed Mejbel; Abdulkadhim, Ammar; Hamzah, A Ruqaia; Hamzah, K Hammed; Ali, Hashim

doi:10.5937/fmet2001082m

Cited by 21 publications

(9 citation statements)

References 22 publications

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“…Abed et al (Abed et al, 2020) conducted a study on the heat transfer behavior of nanofluid superposed porous-nanofluid layer in a circular cylinder tube, where a significant increase in convective heat transfer was observed, depending on the flow conditions and CNT concentration. In another study, Nazari et al (Nazari et al, 2014) aimed to investigate CPU cooling using alumina and CNT nanofluids, and compare the results with the cooling performance of pure base fluids, namely, water and ethylene glycol.…”

Section: Introductionmentioning

confidence: 99%

Effect of flow rate and CNM concentration in nanofluid on the performance of convective heat transfer coefficient

Anggono,

Riswanto,

Ismoen

et al. 2023

Front. Mech. Eng.

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The aim of this study is to investigate the thermal performance of water-based Carbon Nano Material (CNM) nanofluids, particularly in the convective heat transfer coefficient (h) parameter, and to analyze the effects of nanoparticle concentration and flow rate on an experimental heat transfer system. To achieve this, the researchers prepared the nanofluid through a 2-step method. In the first step, we mixed the nanoparticles with the base fluid using a magnetic stirrer to ensure homogenization, with the CNM-Water ratio set at 30, 75, 120, and 150 ppm. In the second step, we characterized the prepared samples, determining their size, composition, and particle morphology through PSA and SEM-EDX examination, as well as measuring their density (ρ) and specific heat (Cp). The experiments were carried out using a flow rate simulation test rig with a data acquisition system, at different flow rates of 0.2, 0.6, 1, and 1.4 L/min. Temperature (T) was measured at the inlet, outlet, and heater to determine the convective heat transfer coefficient value. The study successfully investigated the direct impact of CNM concentration and flow rate, with the results showing a consistent and expected value of the coefficient compared to previous studies. The highest coefficient value was observed at 150 ppm CNM-Water ratio and a flow rate of 1.4 L/min, with a value of 1825.37 W/(m2.K).

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Section: Introductionmentioning

confidence: 99%

Effect of flow rate and CNM concentration in nanofluid on the performance of convective heat transfer coefficient

Anggono,

Riswanto,

Ismoen

et al. 2023

Front. Mech. Eng.

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“…Isam et al [17] analysed heat transfer characteristics by natural convection within a trapezoidal cavity consists of an adiabatic circular cylinder positioned at its center packed with Ag-water nanofluid in porous field. Results reveals that thickness of the boundary layer is inversely proportional to the heat expansion and high Rayleigh number boosts the fluid flow.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Natural Convection Flow in a Square Porous Enclosure Filled with Casson Viscoelastic Fluid

et al. 2023

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The present simulation, a numerical investigation of natural convection of Casson viscoelastic fluid in a porous square enclosure has been reported. Darcy-Boussinesq approximation mathematical model has been considered. The enclosure has been uniformly heated from the left wall and uniformly cooled from right side wall. The developed partial differential equations of the present computational domain are employed by using stream function approach along with finite difference scheme. The house-computational numerical algorithm has been validated against with the previous work and the computational results have been registered a good correlation. All the important results as shown by streamlines, isotherms, and local Nusselt numbers, the impact of Casson fluid parameter (β), Rayleigh number (Ra) is examined. It has been observed that with the increase in Casson fluid parameter (β), the buoyancy induced fluid circulation and convection effect decreases inside the enclosure. For each Rayleigh number, there correspond a critical Casson fluid parameter (β), for which the heat transfer inside the enclosure takes place solely by conduction mode. It has been also observed that at high Casson viscoelastic fluid the effect of increase in Rayleigh number on average Nusselt number is lesser compared to the effect of increasing Rayleigh number at low Casson viscoelastic fluid.

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“…It is very important in many industrial applications like casting [37][38][39]. The porous media is also promising technique which depends on by some researchers in building their enclosures [40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Analysis of the Thermal Behavior of Alumina-Water Nanofluid Inside Hexagonal and Octagonal Enclosed Domain

Ghoben¹,

Hussein²

2023

ARFMTS

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The current work focused on the study of the laminar and steady free convection of Aluminum Oxide / Water nanofluid inside cavities. Two different cavities have the same volume but different overall surface area and count of walls are studied. These cavities are heated differentially on the vertical square side walls which of identical area and dimensions for both cavities. The other vertical walls of these cavities have hexagonal and octagonal shapes. The first cavity has eight walls while the second has ten walls. The study accomplished for solid particles volume fraction and Rayleigh number ranges of (φ = 0.01, 0.03, 0.05) and (103 ≤ Ra ≤ 106). The study interested highly by the effect of the cavity geometry parameters including the lateral cross section, the height, the number of walls on the flow and heat transfer. Other flow parameters are recognized on the fluid flow and heat transfer fields like the nanoparticles volume fraction and the Rayleigh number. The results indicated that the surface area increase by means the additional walls has an observed effect on guiding the results. Where the octagonal cavity has better enhancement in heat transfer especially at (Ra=104 and 105). The percent increase in Nu over the hexagonal cavity is (0.6, 0.8, 0.7, 0.3) for the specified Ra range.

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Natural convection heat transfer for adiabatic circular cylinder inside trapezoidal enclosure filled with nanofluid superposed porous-nanofluid layer

Cited by 21 publications

References 22 publications

Effect of flow rate and CNM concentration in nanofluid on the performance of convective heat transfer coefficient

Effect of flow rate and CNM concentration in nanofluid on the performance of convective heat transfer coefficient

Numerical Study of Natural Convection Flow in a Square Porous Enclosure Filled with Casson Viscoelastic Fluid

Three-Dimensional Analysis of the Thermal Behavior of Alumina-Water Nanofluid Inside Hexagonal and Octagonal Enclosed Domain

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