Natural convection heat transfer from isothermal horizontal plates of different shapes

Al-Arabi, M.; El-Riedy, Medhat

doi:10.1016/0017-9310(76)90069-7

Cited by 134 publications

(43 citation statements)

References 3 publications

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“…Figure 3 depicts the heat transfer coefficient versus the heat transfer rate for the horizontal un-finned flat plate. It can be seen that the present result for the flat plate shows good agreement with the results of Al-Arabi and El-Riedy [25] and Churchill and Chu [26] for the flat plate. It is clear, from the above, that the experimental approach employed was valid.…”

Section: Heat Transfer Coefficientsupporting

confidence: 91%

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Natural convective performance of perforated heat sinks with circular pin fins

Wen

Yeh

2015

Heat Mass Transfer

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Section: Heat Transfer Coefficientsupporting

confidence: 91%

“…This shows that the experimental heat transfer coefficient follows a similar trend to the results of Refs. [25,26]; however, they are located between those shown by an average deviation of 9 %. This could be attributed to the uncertainties in the experimental results and those in the used correlation.…”

Section: Heat Transfer Coefficientmentioning

confidence: 89%

Natural convective performance of perforated heat sinks with circular pin fins

Wen

Yeh

2015

Heat Mass Transfer

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“…While they observed flow partitioning through collision lines for the boundary layer along the plate edges for each of the planforms, in the case of the circular plate, they found radially accelerating flow from the edges, which then transitioned into a billowing plume at the center. Ackroyd [7] investigated the edge flows and fluid property variations for rectangular horizontal plates and Al-Arabi and El-Riedy [8] conducted further heat transfer studies on plates of various shapes, and observed both edge and corner effects, whereas Garcia-Ybarra and Trevino [9] analyzed the thermal diffusion effects of hydrogen-air mixtures within the development of a boundary layer on a hot flat plate. Heat transfer experimental studies have also been performed circular cylindrical conduit [12], on finned tubes to determine the effect on refrigeration efficiency [13], and basic analysis on a heated cylinder [18].…”

Section: Figure 1 Hot Surface Flow Mechanismmentioning

confidence: 99%

The fluid thermal field over a flat heated disk

Landers¹,

Disimile²,

Toy³

2017

IJHT

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Numerous fires in the aviation community are typically initiated and sustained when a flammable fluid leaks onto a heated surface sometimes resulting in a catastrophic event. Due to the complex fluid thermal nature of these phenomena a two-prong effort was undertaken. Within this phase of the effort the focus is to provide insight into the fluid dynamic and thermal nature of a flow field induced by a heated surface. To this end the current work discusses the temperature and velocity fields immediately above a circular flat plate 20 cm diameter and which was heated to temperatures between 150 ℃ and 550 ℃. Both Schlieren and laser light sheet methodologies had been used to acquire data for qualitative and quantitative examination of the flow field. It has been found that the streamlines referred to as collision lines which emanate from the edge of the plate point radially inward towards the plates center. These lines connect and form cellular structures adjacent to the plates' surface. These cell-like structures appear to be reminiscent of Rayleigh Bernard type cells of either 5 or 6 sided constructions. In addition, at certain surface temperatures, pool boiling of the fluid is initiated; however, at even higher temperatures film boiling typically occurs which is thought to lead to ignition and flame propagation. The results concluded that as the distance increases from the plate the velocity of the vortical structures increases while the temperature decreases.

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“…Al-Arabi [11] he conducted an experimental and numerical study on natural convection heat transfer from an isothermal horizontal plate for different shapes and he and he arrive in an expressions for Nusselt number in terms of Rayleigh number, and also he found that the average heat transfer coefficient from a circular plate is almost equal to the heat transfer coefficient for the square plate, only when the heat transfer at the corner is negligible.…”

Section: IImentioning

confidence: 99%