Numerical simulation on performance evaluation among metal and oxide based nanofluids for power savings application of a circular tube

Rabby, Insiat Islam; Hossain, Farzad; Amin, Sakib Bin; Islam, A. K. M. Sadrul

doi:10.18186/thermal.977996

Cited by 3 publications

(2 citation statements)

References 42 publications

(37 reference statements)

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“…Agarwal et al [3] observed that nanofluids were shown to be very stable in lower volume fractions compared with the higher volume fraction. The utilization of nanofluids will remarkably raise the heat transfer coefficient, while at the same time, dramatically increase thermal conductivity, viscosity, particle size and particle concentration [4][5][6][7][8][9][10]. Moreover, energy is an important topic, and effective utilization of energy can reduce environmental emissions [11].…”

Section: Introductionmentioning

confidence: 99%

Investigation of laminar forced convection heat transfer of nanofluids through flat plate solar collector

Hossain¹,

MIAH²,

Morshed³

et al. 2021

Journal of Thermal Engineering

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The paper analyzes laminar forced convection heat transfer for both single and mixture phase models utilizing Al 2 O 3 -water and CuO-water nanofluids as the working fluid and examines the effect of internal fins in the collector tubes in order to improve collector efficiency. A physical model with governing equations has been defined. Finite volume method has been utilized for discretizing governing equations and finite element method has been utilized for three-dimensional analysis of solar plate model with finned tubes. Convective heat transfer coefficient, Nusselt number and shear stress have been analyzed for Reynolds numbers from 200 to 700 with 0-5% volume fractions of nanofluid. Moreover, the efficiency of the collector has been investigated for constant flow rates from 0.02 to 0.04 mL/s and variable overall heat loss coefficient for the same range of volume fractions of nanofluid. It has been found that increment of shear stress and heat transfer coefficient occurred with the increment of concentration of nanoparticles and the Reynolds number. Investigation of particle size has not shown any notable variation with the mixture phase model. Mixture-phase model gives comparatively lower values due to the reduction of viscosity near the wall. Noticeable increment of efficiency has been observed by changing working fluid from Al 2 O 3 -water to CuO-water which has been further improved by utilizing variable overall heat loss coefficient. Efficiency increases up to 6.5% and 8.7% than the base fluid for utilizing Al 2 O 3 -water and CuO-water nanofluid respectively. Additionally, utilizing internal fins to the riser tubes, the efficiency increases up to 11%.

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Section: Introductionmentioning

confidence: 99%

Investigation of laminar forced convection heat transfer of nanofluids through flat plate solar collector

Hossain¹,

MIAH²,

Morshed³

et al. 2021

Journal of Thermal Engineering

Self Cite

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“…Recently, Rabby et al (2021), Kusworo et al (2020), Kumar et al (2017), and several researchers conducted studies related to nanofluids due to the advancement of nanofluids.…”

Section: Introductionmentioning

confidence: 99%

Effect of Saw Type Corrugated Pipe on Laminar Convective Heat Transfer by Using SiC-Water Nanofluid: A Numerical Study

Rabby

Hossain²,

Raihan³

et al. 2021

JER is an international, peer-reviewed journal that publishes f

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Enhancing the heat transfer rate is highly required to remove excessive heat load from the heat transfer apparatus, which may cause massive damage to the equipment. Thus, increment of heat transfer area is one of the prime solutions for this issue. The increment of heat transfer area can be done by enhancing the pipe wall and incorporating nanoparticles with working fluids because nanoparticles showed much faster heat dispersion due to a vast surface area for heat transfer and increased thermal conductivity. Also, small molecules of nanoparticles are allowed for free movement and thus micro-convection, promoting high thermal conductivity. Higher thermal conductivity is mainly the result of a higher heat transfer rate. Therefore, in this study, a saw-type corrugated tube was considered along with the SiC-water nanofluid as the working fluid to determine the improvement of laminar convective heat transfer in terms of the Nusselt number, heat transfer coefficient, and pressure loss. The result demonstrated that by increasing the Reynolds number, the Nusselt number, heat transfer coefficient, and pressure loss were increased significantly with the enhancement of SiC-water concentration. At a Reynolds number of 1200, the maximum increment of Nusselt number in comparison to the base fluid was 9.15% when the corrugated pipe was considered. Meanwhile, the maximum improvement of heat transfer coefficient for SiC-water nanofluid in comparison to the base fluid was 37.66%.

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Entropy generation of Al2O3/water nanofluid in corrugated channels

Saoudi

Zeraibi

2023

Journal of Thermal Engineering

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The flow of nanofluids in a corrugated channel has been shown to have a significant impact on heat transfer performance, and has therefore become an important area of research. The ob- jective of this paper is to understand the thermal behavior of Al2O3/water nanofluid in a sinu-soidal and square channel and to identify ways to optimize heat transfer performance in such configurations. For this purpose, a numerical simulation was conducted using ANSYS-Fluent software 16.0 on entropy generation and thermo-hydraulic performance of a wavy channel with the two corrugation profiles (sinusoidal and square). The analyses were carried out under laminar forced convection flow conditions with constant heat flux boundary conditions on the walls. The influence of various parameters, such as particle concentration (0–5%), particle di-ameter (10nm , 40nm and 60nm), and Reynolds number (200 < Re < 800) on the heat transfer, thermal, and frictional entropy generation, and Bejan number was analyzed. Moreover, the distribution of streamlines and static temperature contours has been presented and discussed, and a correlation equation for the average Nusselt number based on the numerical results is presented. One of the most significant results obtained is that the inclusion of nanoparticles (5% volume fraction) in the base fluid yielded remarkable results, including up to 41.92% and 7.03% increase in average Nusselt number for sinusoidal and square channels, respectively. The sinusoidal channel exhibited the highest thermo-hydraulic performance at Re= 800 and φ= 5%, approximately THP= 1.6. In addition, the increase of nanoparticle concentration from 0% to 5% at Re= 800 and dnp= 10nm, diminishes the total entropy generation by 28.39 % and 22.12 % for sinusoidal and square channels, respectively, but when the nanoparticle diameter decreases from 60nm to 10nm at ϕ= 5% and Re= 800, the total entropy generation in the sinusoidal channel decreases by 34.85%, whereas in the square channel, it decreases by 20.05%. Therefore, rather than using a square channel, it is preferable and beneficial to use small values of nanoparticle diameter and large values for each of ϕ and Re in the sinusoidal wavy channel. Overall, the study of nanofluid flow in a wavy channel can provide valuable insights into the behavior of nanofluids and their potential applications in a variety of fields, including manufacturing, energy produc-tion, mining, agriculture, and environmental engineering.

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Numerical simulation on performance evaluation among metal and oxide based nanofluids for power savings application of a circular tube

Cited by 3 publications

References 42 publications

Investigation of laminar forced convection heat transfer of nanofluids through flat plate solar collector

Investigation of laminar forced convection heat transfer of nanofluids through flat plate solar collector

Effect of Saw Type Corrugated Pipe on Laminar Convective Heat Transfer by Using SiC-Water Nanofluid: A Numerical Study

Entropy generation of Al2O3/water nanofluid in corrugated channels

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