Heat transfer in porous media of steel balls under oscillating flow

Pamuk, Mehmet Turgay; Özdemir, Mustafa

doi:10.1016/j.expthermflusci.2012.04.015

Cited by 22 publications

(5 citation statements)

References 9 publications

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“…Salud, Ciencia y Tecnología -Serie de Conferencias. 2024; 3:845 2 Mehmet et al (13) studied porous medium consists of 3 mm steel balls enclosed in a 51,4 mm inner diameter pipe. Heat is applied to the exterior surface of the pipe at a rate of approximately 7,5 kW/m2 using electrical ribbon heaters.…”

Section: Introductionmentioning

confidence: 99%

Forced convective rate and pressure drop through a packed annulus: a numerical simulation

Sabah Falieh,

Najeeb Shehab

2024

Salud, Ciencia y Tecnología - Serie de Conferencias

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Porous materials are used in engineering and industry due to their heat transmission qualities. This study examined forced convection flow through an annular tube packed with sphere balls of various materials and sizes using numerical analysis. The sphere balls were permeable. Ceramic, plastic, and steel with spherical diameters of 3, 5, and 6 and porosity of 0.4 were tested for heat dissipated and fluid flow. Also, test the impact of steel balls of diameter 6mm with 0.6 and 0.8 porosity. The numerical simulation results are used to analyze the forced convection and fluid flow parameters of a three-dimensional annular tube with continuous heat flux in the Reynold number range (5000-14000). Steel balls had an 80% higher heat transfer coefficient than annular tubes without porous mediums. The simulation showed that inserting the porous media increased annular tube pressure loss. The maximum heat transfer coefficient improved by about 80% when the spherical diameter is 3 mm. Also, the result illustrated the heat transfer coefficient of steel balls Increased by about 79%, 69%, and 49%, with 0.4, 0.6, and 0.8 respectively

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Section: Introductionmentioning

confidence: 99%

Forced convective rate and pressure drop through a packed annulus: a numerical simulation

Sabah Falieh,

Najeeb Shehab

2024

Salud, Ciencia y Tecnología - Serie de Conferencias

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“…Jin and Leong 31 studied pressure drop and friction factor of steady and oscillating flows in open‐cell porous media. Pamuk and Özdemir 32 experimentally studied heat transfer in porous media under oscillating water flow. Falade et al 33 studied magnetohydrodynamic (MHD) oscillatory flow through a porous channel.…”

Section: Introductionmentioning

confidence: 99%

Viscoelastic effects on the oscillatory flow in a fluid‐saturated porous layer

Raghunatha,

Inc,

Vinod

2023

Heat Trans

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The oscillating flow of the viscoelastic fluid‐saturated porous layer has been useful in many areas, including the petroleum, chemical, and bioengineering industries. It is studied using the modified Darcy‐Oldroyd‐B model in this article. The exact solution is obtained utilizing a simpler and more reasonable method. According to this velocity solution, the time‐velocity profile of one kind of viscoelastic fluid is analyzed. From the analysis, it was found that the flow behaves like the Newton fluid when the oscillating frequency is low, and the flow reversal occurs when the oscillating frequency is high. Further, velocity, temperature, shear stress, and the rate of heat transfer are exponential solutions that are obtained and analyzed for different values of known physical parameters. Finally, we recognize that the relaxation and retardation parameters in this model act in the opposite manner.

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“…Oscillation-induced heat transport processes maintaining an effective heat transfer enhancement have been demonstrated [7][8][9][10][11]. Recently, the fluid flow and heat transfer characteristics of oscillating flow through porous media are explored [12][13][14][15]. All of these studies indicated that employing high amplitude and frequency of the oscillating flow would increase the heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Flow Visualization and Heat Transfer Characteristics of Oscillating Fluid through Pin-Fin Array in a Rectangular Channel

Jeng

Tzeng

Hsu

et al. 2013

Advances in Mechanical Engineering

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This work experimentally investigated the fluid flow and heat transfer characteristics of the pin-fin heat sink with the oscillating air flow. The oscillating air flow would be unstable in the passages among the fins due to the periodical change of flow rate. It might enhance the overall heat-transfer performance. At the present study, the pin-fin heat sinks with various fin heights were installed in the rectangular channel, resulting in different bypass clearances between the pin fins and the shroud of the test channel. The smoke flow visualizations for the oscillating-flow system were completed. The heat-transfer tests under the asymmetrically heated condition were performed to obtain the average Nusselt numbers. The smoke lines with obvious waves in the transverse direction were found in the results of the flow visualizations. By comparing to the steady flow system, there was about 20∼34% increment in the overall heat-transfer performance at the operating state without bypass clearance. However, if the bypass clearance was too big, the heat-exchange capacity of the oscillating flow was less than that of the steady flow. It demonstrates that the oscillating flow promotes the cooling performance of pin-fin heat sink at the non-bypass and specified bypass conditions.

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Heat transfer in porous media of steel balls under oscillating flow

Cited by 22 publications

References 9 publications

Forced convective rate and pressure drop through a packed annulus: a numerical simulation

Forced convective rate and pressure drop through a packed annulus: a numerical simulation

Viscoelastic effects on the oscillatory flow in a fluid‐saturated porous layer

Flow Visualization and Heat Transfer Characteristics of Oscillating Fluid through Pin-Fin Array in a Rectangular Channel

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