Experimental study of the hydrodynamic and heat transfer of air-assistant circular water jet impinging a flat circular disk

2017 ◽  
Vol 106 ◽  
pp. 804-809 ◽  
Author(s):  
Brian K. Friedrich ◽  
Tamira D. Ford ◽  
Aspen W. Glaspell ◽  
Kyosung Choo
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Circular Disk ◽  
Water Jet

An Experimental Study of Heat Transfer With an Impinging Circular Water Jet

2003 ◽  
Author(s):  
Hao Leng ◽  
Liejin Guo ◽  
Ximin Zhang ◽  
Hongbin Min ◽  
G.-X. Wang
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
High Efficiency ◽  
Impinging Jet ◽  
High Heat ◽  
Water Jet ◽  
Back Surface ◽  
High Tech ◽  
High Heat Flux ◽  
Transfer Coefficients

Impinging jet is widely used in both traditional industrial and new high-tech fields. High efficiency heat transfer in impinging jet cooling makes it an important method for heat transfer enhancement, in particular in cooling of electronic devices with high heat density. This paper presents an experimental study of heat transfer by an impinging circular water jet. A Constantan foil with the size of 5 mm × 5 mm was used to simulate a microelectronic chip with heat generated by passing an electrical current through the foil. A high heat flux over 106 W/m2 was achieved. The surface temperature was measured by a thermocouple glued onto the back surface of the foil. Both a free surface jet and a submerged jet were investigated. Effect of the nozzle-to-surface spacing as well as the jet speed at the exit of the nozzle on cooling was examined. By positioning the jet away from the center of the heating foil surface, the radial variation of the heat transfer coefficients over the foil was also investigated. Quantitative heat transfer data have been obtained and analyzed.

scholarly journals Passively Enhanced Natural Convection Heat Transfer via Swirl Effect

2021 ◽  
Author(s):  
L. Di Liddo ◽  
D. Naylor
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Natural Convection ◽  
Convective Heat Transfer ◽  
Transfer Rate ◽  
Swirling Flow ◽  
Convection Heat Transfer ◽  
Circular Disk ◽  
Natural Convection Heat Transfer ◽  
Convection Heat

A numerical and experimental study, in the preliminary stages, has been conducted examining the effect of swirling flow on the natural convective heat transfer rate from a flat, horizontal, heated, upward facing, isothermal circular disk surrounded by insulation.

scholarly journals Passively Enhanced Natural Convection Heat Transfer via Swirl Effect

2021 ◽  
Author(s):  
L. Di Liddo ◽  
D. Naylor
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Natural Convection ◽  
Convective Heat Transfer ◽  
Transfer Rate ◽  
Swirling Flow ◽  
Convection Heat Transfer ◽  
Circular Disk ◽  
Natural Convection Heat Transfer ◽  
Convection Heat

A numerical and experimental study, in the preliminary stages, has been conducted examining the effect of swirling flow on the natural convective heat transfer rate from a flat, horizontal, heated, upward facing, isothermal circular disk surrounded by insulation.

Experimental study of thermohydraulic characteristics and irreversibility analysis of novel axial corrugated tube with spring tape inserts

2020 ◽  
Vol 92 (3) ◽  
pp. 30901
Author(s):  
Suvanjan Bhattacharyya ◽  
Debraj Sarkar ◽  
Ulavathi Shettar Mahabaleshwar ◽  
Manoj K. Soni ◽  
M. Mohanraj
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Thermal Performance ◽  
Working Fluid ◽  
The Novel ◽  
Heat Exchanger Tube ◽  
Heat Transfer Augmentation ◽  
Corrugated Tube ◽  
The Impact ◽  
Exchanger Tube

The current study experimentally investigates the heat transfer augmentation on the novel axial corrugated heat exchanger tube in which the spring tape is introduced. Air (Pr = 0.707) is used as a working fluid. In order to augment the thermohydraulic performance, a corrugated tube with inserts is offered. The experimental study is further extended by varying the important parameters like spring ratio (y = 1.5, 2.0, 2.5) and Reynolds number (Re = 10 000–52 000). The angular pitch between the two neighboring corrugations and the angle of the corrugation is kept constant through the experiments at β = 1200 and α = 600 respectively, while two different corrugations heights (h) are analyzed. While increasing the corrugation height and decreasing the spring ratio, the impact of the swirling effect improves the thermal performance of the system. The maximum thermal performance is obtained when the corrugation height is h = 0.2 and spring ratio y = 1.5. Eventually, correlations for predicting friction factor (f) and Nusselt number (Nu) are developed.

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