A review paper on heat transfer and flow dynamics in subsonic circular jets impinging on rotating disk

Alotaibi, Huda Mohammed; Hassan, Mouhammad El; Assoum, Hassan; Meraim, Kamel Abed; Sakout, Anas

doi:10.1016/j.egyr.2020.11.124

Cited by 10 publications

(5 citation statements)

References 29 publications

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“…The liquid film is noticed to extend more in the lateral direction at a plate velocity of 20 mm/s compared to 40 mm/s. Alotaibi et al (2020) summarized the most essential outcomes for jet impingement on a stationary and rotating disc. Several important investigations dealing with numerical and experimental studies are reviewed and presented in Alotaibi et al (2020).…”

Section: Introductionmentioning

confidence: 99%

“…Alotaibi et al (2020) summarized the most essential outcomes for jet impingement on a stationary and rotating disc. Several important investigations dealing with numerical and experimental studies are reviewed and presented in Alotaibi et al (2020). Many parameters are identified to influence the flow and enhance mass and energy transfer such as; Reynolds number, nozzle configuration, nozzle-to-target spacing, angle of incidence of the impinging jet, and the flow regime and profile at the nozzle exit.…”

Section: Introductionmentioning

confidence: 99%

“…Many parameters are identified to influence the flow and enhance mass and energy transfer such as; Reynolds number, nozzle configuration, nozzle-to-target spacing, angle of incidence of the impinging jet, and the flow regime and profile at the nozzle exit. In the case of a rotating disc, Alotaibi et al (2020) explained that the centrifugal force has a significant impact on the vortex dynamics in different regions of the impinging jet. Several other studies on a rotating disc neglected the effect of the rotational motion on the velocity field.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cooling enhancement for engine parts using jet impingement

Nasif,

Shinneeb,

Balachandar

2024

Front. Mech. Eng.

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A computational study has been performed to evaluate the use of jet impingement for cooling applications in the automotive industry. The current study uses an entire internal combustion engine cylinder with its components as a computational domain. An unsteady numerical solution for the Navier-Stokes equations was carried out using Improved Delayed Detached Eddy Simulation (IDDES). The volume of fluid approach is proposed to track and locate the liquid jet surface that is in contact with the air. The conjugate heat transfer approach is used to link the heat transfer solution between the fluid and the solid. The boundary conditions that are employed in the study are provided from lab experiments and one-dimensional simulations. The cooling jet in this study targets the hottest region in the piston, i.e., the region underneath the exhaust valve. Three nozzle sizes with flows at different Reynolds numbers are chosen to examine the thermal characteristics of the cooling jet. The computational study reveals that for a specific Reynolds number, the smaller diameter nozzle provides the highest heat transfer coefficient around the impingement point. The maximum relative velocity location at the impingement point slightly leads the location of the maximum Nusselt number. The maximum temperature in the piston decreases by 7% to 11% as the nozzle diameter changes from 1.0 to 3.0 mm for a jet Reynolds number of 4,500. If a correct selection is made for the nozzle size, the cooling jet can be efficiently used to reduce the temperature and alleviate the thermal stresses in the piston in the region underneath the exhaust valve where the maximum temperature occurs.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cooling enhancement for engine parts using jet impingement

Nasif,

Shinneeb,

Balachandar

2024

Front. Mech. Eng.

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“…Consequently, it was observed that the rotation speed had a more significant effect at 30 rpm. Altaibi et al [15] analysed the impingement of jets on heat transfer characteristics of the target rotating for Reynolds number, nozzle geometry, spacing between jet exit and the impinging plate, and the angle of impinging of the jet at the exit of the jet flow regime. It was inferred that the jet diameter, the Reynolds number, and the boundary layer thickness were the parameters that influenced the heat transfer characteristic.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Cooling an Industrial Roller by Using Swirling Jets

Kılıç

Sahin

Demircan

et al. 2022

ECJSE

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Effective cooling of industrial rollers has prime importance to prevent the quality degradation of the system and product. High temperature difference on the roller surface may result in thermal stresses and can cause deformations on roller surface and product. In order to prevent these deformations, cooling of an industrial roller by using swirling jets is investigated for different parameters numerically in this study. Effects of Reynolds number, surface heat flux and variation in inlet temperature of the fluid on the performance of an industrial roller are investigated in terms of temperature difference between inner and outer surface of the roller. ANSYS Fluent CFD program is used to simulate heat transfer and fluid flow in this numerical study. As a result, it is obtained that increasing Re number from 1000 to 1700 causes a decrease of 45.4% in the temperature difference between inner and outer surface of the roller. Increasing surface heat flux from 5000 to 12500 W/m2 has resulted in an increase of 149.4% in difference between inner and outer surface temperature. Increasing coolant fluid inlet temperature from 5 to 20°C has resulted in an increase of surface temperature but there is no significant change in heat transfer characteristics of the system. It is evaluated that the results of this study will contribute to design more effective cooled industrial roller.

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“…Therefore, a deep understanding of the flow physics in such impinging jet configurations would be of benefit and can help defining passive and active flow control methods for specific industrial applications. A review of the most important findings for the jet flow impinging on a rotating disk available in the literature is presented in [14]. This literature review focuses on the jet flow patterns and heat transfer on the impinging plate.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Vortex Dynamics in Circular Jet Impinging on Rotating Disk

Hassan

Nobes

2022

Fluids

Self Cite

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A circular jet impinging perpendicularly onto a rotating disk is studied in order to understand the influence of centrifugal forces on the radial wall jet. Time-resolved Particle Image Velocimetry (TR-PIV) measurements are conducted in different jet regions in order to investigate the flow physics of the large-scale vortical structures and the boundary layer development on the impinging wall for both stationary and rotating impinging disks. The Reynolds number is ReD = 2480, the orifice-to-plate distance H = 4D (D is the jet-orifice diameter) and the rotation rate is 200RPM. It is found that the rotation of the impinging wall results in strong centrifugal effects, which affect different regions of the jet. Both radial velocity profiles and turbulence intensity distributions show different behavior when comparing the stationary and rotating cases. Finite Time Lyapunov Exponent (FTLE) analysis is implemented to describe the time-resolved behavior of the large-scale vortical structures and flow separation.

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A review paper on heat transfer and flow dynamics in subsonic circular jets impinging on rotating disk

Cited by 10 publications

References 29 publications

Cooling enhancement for engine parts using jet impingement

Cooling enhancement for engine parts using jet impingement

Numerical Investigation of Cooling an Industrial Roller by Using Swirling Jets

Experimental Investigation of the Vortex Dynamics in Circular Jet Impinging on Rotating Disk

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