A mixed convection in a reciprocating $$\Uppi$$ shape channel with opposite direction of gravity and inlet cooling fluids

Fu, Wu‐Shung; Lian, Sin-Hong; Lai, Yin‐Hung

doi:10.1007/s00231-008-0464-7

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…An investigation of the heat transmission processes in a fluid-cooled reciprocating channel was carried out via the use of numerical research by Fu et al [8]. After that, the arbitrary Lagrangian-Eulerian Kinematics approach and the Finite Element Approach are used in order to address the moving boundary issue that is associated with the reciprocating piston.…”

Section: Introductionmentioning

confidence: 99%

Mixed Convection Heat Transfer in a Channel-Open Cavity with Two Heat Sources

Rashid¹,

Al-Gaheeshi²,

Rahman³

et al. 2023

IJHT

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With the aid of the COMSOL program, the laminar mixed convection heat transfer in a channel-open cavity with two heat sources of constant 20 W each and varying input air velocity ranges (0.1, 0.5, 1.0, and 1.5 m/s) is numerically determined. In this study, the effect of varying inlet air velocity on the heat transfer characteristics is investigated. Numerical results show that the temperature starts to fall steadily as one moves farther and further away from the site of the two heat sources and closer to the horizontal channel. The higher the velocity of the air entering the cavity, the greater the natural convection that will be created by the heated heat sources. The increase in inlet air velocity will increase the turbulence of airflow and thus increases the pressure distribution. The increase in absolute y-direction decreases the velocity distribution. The rise in the inlet velocity of air will increase the transfer of heat; thus, the Nusselt number will be great when increasing air flow velocity. The maximum Nusselt number is at the interface and reduces with increasing the absolute value of y. A reduction in air temperature and an increase in air density result from an increase in natural convection from the cavity into the air stream caused by an increase in air input velocity.

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Section: Introductionmentioning

confidence: 99%

Mixed Convection Heat Transfer in a Channel-Open Cavity with Two Heat Sources

Rashid¹,

Al-Gaheeshi²,

Rahman³

et al. 2023

IJHT

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show abstract

“…Fu et al [8] performed a numerical study to investigate the heat transfer mechanisms in a fluid-cooled reciprocating channel. The moving boundary problem of the reciprocating piston is then resolved using the random Largragian-Eulerian Kinematics technique as well as Finite Element Method.…”

Section: Introductionmentioning

confidence: 99%

Thermo-Hydraulic Analysis of Mixed Convection in a Channel-Square Enclosure Assembly with Hemi-Sphere Source at the Bottom

Al-Gaheeshi¹,

Rashid²,

Eleiwi³

et al. 2023

IJHT

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The thermo-hydraulic analysis of laminar mixed convection (forced and natural) through a horizontal channel-enclosure assembly equipped with a heated hollow hemispherical source (constant power of 20 W) in the bottom of the enclosure and different inlet air velocities equivalent to Reynolds number ranged (2.8814, 14.407, 28.814, and 43.221) are obtained numerically with the help of COMSOL Program. The impact of altering the input air velocity on the thermo-hydraulic properties is explored here as part of the research project. Good agreement was found between the derived numerical findings and those already established in the literature. The pressure profile throughout the channel is not altered via the numerically simulated increase on the positive y-axis. Increasing the incoming air velocity increases the natural convection induced via the heated source, which in turn increases the blending of cold and hot air within the enclosure and reduces the temperature gradient across the channel. As a result of the circumstances preventing slippage, the channel area exhibits the characteristic velocity profile of laminar flow, which consists of zero velocity at the channel walls and the maximum velocity in the channel's middle. The area of the recirculating streamlines is expanded by the rise in the velocity of intake air. As the incoming air velocity increases, so does the average Nusselt number.

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An enhancement of the back region forced convection heat transfer rates of a reciprocating curved channel with a rib by the ALE method

Lai

Huang

2013

International Communications in Heat and Mass Transfer

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A mixed convection in a reciprocating $$\Uppi$$ shape channel with opposite direction of gravity and inlet cooling fluids

Cited by 3 publications

References 12 publications

Mixed Convection Heat Transfer in a Channel-Open Cavity with Two Heat Sources

Mixed Convection Heat Transfer in a Channel-Open Cavity with Two Heat Sources

Thermo-Hydraulic Analysis of Mixed Convection in a Channel-Square Enclosure Assembly with Hemi-Sphere Source at the Bottom

An enhancement of the back region forced convection heat transfer rates of a reciprocating curved channel with a rib by the ALE method

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