Research on the audible acoustic field-enhanced heat transfer of double-pipe exchangers: Effect of laminar flow and turbulence, vertical and horizontal placement of pipes

Hou, Siqin; Li, Jiao; Shen, Guoqing; Sun, Menghong; Zhang, Shiping

doi:10.1016/j.icheatmasstransfer.2023.106979

International Communications in Heat and Mass Transfer

2023

DOI: 10.1016/j.icheatmasstransfer.2023.106979

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Research on the audible acoustic field-enhanced heat transfer of double-pipe exchangers: Effect of laminar flow and turbulence, vertical and horizontal placement of pipes

Siqin Hou

Jiao Li

Guoqing Shen

et al.

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2024

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Cited by 3 publications

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Thermo-hydraulic Investigation of a Heat Exchanger Tube Equipped with 3D-Printed Swirl Flow Generators

Aksoz,

Bogrekci,

Demircioglu

et al. 2024

Arab J Sci Eng

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Heat transfer capabilities of the heat exchangers require enhancements to save energy and decrease their size. For this purpose, the swirl generators have been widely preferred. However, the swirler inserts have not reached their optimum shape. Thus, this study experimentally and numerically investigates the impact of novel 3D-printed swirler inserts with varying twist angles in the range of 0°–450° on the thermo-hydraulic performance of solar absorber tube heat exchangers under laminar flow (Re = 513–2054) condition. Friction factor, Nusselt number, and performance evaluation criterion (PEC) were used to assess heat exchanger performance, and related correlations are provided. Tangential velocity components were also used to explore fluid flow characteristics in local analysis. Numerical investigation was done by using computational fluid dynamics adopting Finite Volume Method in ANSYS Fluent. Results show that 3D-printed swirlers considerably increase heat transfer compared to plain tube. The swirler with a twist angle of 450° led to the maximum enhancements of nearly 217% in average Nusselt number and around 1630% in friction factor at Reynolds number of 2054. Overall, increasing Reynolds number enhanced Nusselt number. The highest PEC of 1.15 was observed at a Reynolds number of 1031 using the swirler with 150° twist angle. Flow near the swirler has higher tangential velocities, hence contributing to local Nusselt number enhancement up to 453.8% compared to plain tube when swirler with twist angle of 450° utilized. It is anticipated that findings of this study can guide further related research and increase the usage of swirlers in heat exchangers.

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Thermo-hydraulic Investigation of a Heat Exchanger Tube Equipped with 3D-Printed Swirl Flow Generators

Aksoz,

Bogrekci,

Demircioglu

et al. 2024

Arab J Sci Eng

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Investigation of heat transfer characteristics in air-to-air heat exchanger with steady flow, oscillating flow and sound waves

Guo,

Gao,

et al. 2024

International Journal of Thermal Sciences

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The physical mechanism of heat transfer enhancement for Al₂O₃-water nanofluid forced flow in a microchannel with two-phase lattice Boltzmann method

Guo,

Liu,

Gong

et al. 2024

MMMS

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PurposeThe purpose of this paper is to analyze the mechanism of nanofluid enhanced heat transfer in microchannels and promote the application of nanofluids in industrial processes such as solar collectors, electronic cooling and automotive batteries.Design/methodology/approachThe two-phase lattice Boltzmann method was used to calculate the flow and heat transfer characteristics of Al2O3 nanofluids in a microchannel at Re = 50. By comparing the simulation results of pure water, nanofluids without calculated nanoparticle-fluid interaction forces and nanofluids with calculated nanoparticle-fluid interaction forces, the effects of physical properties improvement and interaction forces on flow and heat transfer are quantified.FindingsThe findings show that the nanofluid (φ = 3%, R = 10 nm) increases the average Nusselt number by 22.40% at Re = 50. In particular, 16.16% of the improvement relates to nanoparticles optimizing the thermophysical parameters of the base fluid. The remaining 6.24% relates to the disturbance of the thermal boundary layer caused by the interaction between nanoparticles and the base fluid. Moreover, the nanoparticle has a negligible effect on the average Fanning friction factor. Ultimately, we conclude that the nanofluid is an excellent heat transfer working medium based on its performance evaluation criterion, PEC = 1.225.Originality/valueTo the best of the authors' knowledge, this research quantifies for the first time the contribution of nanoparticle-liquid interactions and nanofluids physical properties to enhanced heat transfer, advancing the knowledge of the nanoparticle's behavior in liquid systems.

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Research on the audible acoustic field-enhanced heat transfer of double-pipe exchangers: Effect of laminar flow and turbulence, vertical and horizontal placement of pipes

Cited by 3 publications

References 22 publications

Thermo-hydraulic Investigation of a Heat Exchanger Tube Equipped with 3D-Printed Swirl Flow Generators

Thermo-hydraulic Investigation of a Heat Exchanger Tube Equipped with 3D-Printed Swirl Flow Generators

Investigation of heat transfer characteristics in air-to-air heat exchanger with steady flow, oscillating flow and sound waves

The physical mechanism of heat transfer enhancement for Al₂O₃-water nanofluid forced flow in a microchannel with two-phase lattice Boltzmann method

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Research on the audible acoustic field-enhanced heat transfer of double-pipe exchangers: Effect of laminar flow and turbulence, vertical and horizontal placement of pipes

Cited by 3 publications

References 22 publications

Thermo-hydraulic Investigation of a Heat Exchanger Tube Equipped with 3D-Printed Swirl Flow Generators

Thermo-hydraulic Investigation of a Heat Exchanger Tube Equipped with 3D-Printed Swirl Flow Generators

Investigation of heat transfer characteristics in air-to-air heat exchanger with steady flow, oscillating flow and sound waves

The physical mechanism of heat transfer enhancement for Al2O3-water nanofluid forced flow in a microchannel with two-phase lattice Boltzmann method

Contact Info

Product

Resources

About

The physical mechanism of heat transfer enhancement for Al₂O₃-water nanofluid forced flow in a microchannel with two-phase lattice Boltzmann method