Heat transfer in a turbulent jet impinging on a moving plate considering high plate-to-jet velocity ratios

Aghahani, Mohammad; Eslami, Ghiyam; Hadidi, Amin

doi:10.1007/s12206-014-1018-1

Cited by 18 publications

(2 citation statements)

References 21 publications

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“…According to their study, as the wall-to-jet velocity ratio is lower than 0.5, the flow is slightly influenced by the motion of the wall. Aghahani et al 23 also varied the wall-to-jet velocity ratio to describe the characteristics of heat transfer between slot jets and a moving plate. As concluded in the study, at a velocity ratio of 1.25, average Nu reaches its minimum, and when the ratio exceeds 2.5, average Nu is even higher than that obtained as the plate remains stationary.…”

Section: Introductionmentioning

confidence: 99%

Effect of flow on heat transfer between a translating plate and gas discharged from multiple inclined slot nozzles

Kang,

Yin,

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The presented study aims to reveal flow and heat transfer characteristics as a translating aluminum plate is impinged by high-temperature gas discharged from inclined slot nozzles. The computational fluid dynamics (CFD) and the fluid-solid interaction (FSI) techniques were used to simulate the impingement process. A comprehensive comparison of flow, heat transfer, and structural parameters was implemented. The results indicate that twin vortices are produced between the two inclined nozzles. When the velocity ratio increases from 0.1 to 1.0, the vortex at the left expands, while the right one is compressed. Meanwhile, average Nusselt number and the pressure coefficient exhibit opposite variation tendencies. The highest average pressure coefficient of 0.45 arises at a velocity ratio of 0.5. As the plate-nozzle distance increases, characteristic flow structures are developed, and the distributions of temperature and the pressure coefficient are uniformized. The maximum Nusselt number decreases from 473 to 266 when the nondimensional plate-nozzle distance increases from 4 to 8. Large deformation occurs at the middle part of the plate. High equivalent stress is concentrated at the front and rear ends of the plate, which is insensitive to the velocity ratio and the plate-nozzle distance.

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Section: Introductionmentioning

confidence: 99%

Effect of flow on heat transfer between a translating plate and gas discharged from multiple inclined slot nozzles

Kang,

Yin,

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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show abstract

“…It was noted that for high surface-to-jet velocity ratios, no stagnation point was detected due to the complete detachment of the flow from the wall. The turbulent convective heat transfer of a slot jet impinging on a moving plate maintained at a constant temperature was numerically studied by Aghahani et al [30]. The jet Reynolds number and the effects of the surface-to-jet velocity ratio on the heat transfer were analyzed.…”

Section: Introductionmentioning

confidence: 99%

Thermal and Fluid Dynamic Behaviors of Confined Slot Jets Impinging on an Isothermal Moving Surface with Nanofluids

et al. 2019

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A two-dimensional numerical investigation of turbulent convective heat transfer due to a confined slot jet impinging on an isothermal moving surface is accomplished. The confined geometry has an upper adiabatic surface parallel to the heated moving plate and the slot jet is in the middle of the confining adiabatic wall. The working fluids are pure water or a nanofluid, which in this case was a mixture of water and Al2O3 nanoparticles. The governing equations are written adopting the k-ε turbulence model with enhanced wall treatment and the single-phase model approach for the nanofluids. The numerical model is solved using the finite volume method with the Ansys Fluent code. Two geometric configurations regarding two values of the jet distance from the target surface are considered in the simulations. The concentration of nanoparticles ranges from 0% to 6%, with a single diameter equal to 30 nm, Reynolds numbers ranging from 5000 to 20000, and a moving surface-jet velocity ratio between 0 and 2 are examined in the investigation. The aim is to study the system behaviors by means of local and average Nusselt numbers, local and average friction factor/skin friction factor, stream function, and temperature fields. Results show that the presence of nanoparticles determines an increase in the dimensionless heat transfer but, as expected, does not affect the friction factor. The local and average increase in Nusselt numbers is also due to a combined effect of the moving plate and nanofluids.

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Experimental analysis of transient and steady-state heat transfer from an impinging jet to a moving plate

Kistak,

Taskiran,

Celik

2024

Heat Mass Transfer

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Heat transfer in a turbulent jet impinging on a moving plate considering high plate-to-jet velocity ratios

Cited by 18 publications

References 21 publications

Effect of flow on heat transfer between a translating plate and gas discharged from multiple inclined slot nozzles

Effect of flow on heat transfer between a translating plate and gas discharged from multiple inclined slot nozzles

Thermal and Fluid Dynamic Behaviors of Confined Slot Jets Impinging on an Isothermal Moving Surface with Nanofluids

Experimental analysis of transient and steady-state heat transfer from an impinging jet to a moving plate

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