Analysis of pulsating convection from two heat sources mounted with porous blocks

Huang, Po-Yuan; Yang, Chao-Fu

doi:10.1016/j.ijheatmasstransfer.2008.04.044

Cited by 20 publications

(3 citation statements)

References 23 publications

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“…Bhargava et al [31] discovered the velocity to augment with an increase in permeability and a reduction of non-Newtonian behavior. Huang and Yang [32] studied forced oscillatory convection in a parallel plate channel with porous blocks mounted to the lower wall. They described the effects of varying the amplitude, frequency, and porous blockage ratio on the flow field and heat transfer of the model.…”

Section: Introductionmentioning

confidence: 99%

A Pore-Scale Investigation of the Transient Response of Forced Convection in Porous Media to Inlet Ramp Inputs

Habib

Yadollahi

Karimi

2020

Journal of Energy Resources Technology

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This paper investigates the transient response of forced convection of heat in a reticulated porous medium through taking a pore-scale approach. The thermal system is subject to a ramp disturbance superimposed on the entrance flow temperature/velocity. The developed model consisted of ten cylindrical obstacles aligned in a staggered arrangement with set isothermal boundary conditions. A few types of fluids, along with different values of porosity and Reynolds number are considered. Assuming a laminar flow, the unsteady Navier Stokes and energy equations are solved numerically. The temporally developing flow and temperature fields as well as the surface averaged Nusselt numbers are used to explore the transient response of the system. Further, a Response Lag Ratio (RLR) is defined to compare the transient response and the input. The results reveal that an increase in amplitude increases the RLR. Nonetheless, an increase in ramp duration decreases the RLR, particularly for high density fluids. Interestingly, it is found that Reynolds number has almost negligible effects upon RLP. This study clearly reflects the importance of conducting pore-scale analyses for understanding the transient response of heat convection in porous media.

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Section: Introductionmentioning

confidence: 99%

A Pore-Scale Investigation of the Transient Response of Forced Convection in Porous Media to Inlet Ramp Inputs

Habib

Yadollahi

Karimi

2020

Journal of Energy Resources Technology

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“…Chiem and Zhao (2004) used a characteristic‐based matrix‐free finite volume method on unstructured grids in order to analyze steady and unsteady incompressible flow and forced convection heat transfer in a channel provided either with porous blocks or solid blocks. Huang and Yang (2008) found that the method combining flow pulsation with heated porous block can be considered as an augment heat transfer tool for cooling electronic devices. Heat transfer due to the flow over two porous blocks situated in a square cavity was investigated by Shuja et al (2009a, b).…”

Section: Introductionmentioning

confidence: 99%

Mixed convection in an inclined channel with heated porous blocks

Guerroudj

Kahalerras²

2012

International Journal of Numerical Methods for Heat &Amp; Fluid Flow

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PurposeThe purpose of this paper is to study numerically the fluid flow and heat transfer in an inclined channel provided with heated porous blocks on its lower plate.Design/methodology/approachThe Brinkman‐Forchheimer extended Darcy model with the Boussinesq approximation is adopted for the flow in the porous regions. The governing equations with the appropriate boundary conditions are solved by the control volume method. The effect of some pertinent parameters such as the buoyancy force intensity, the porous blocks shape and height, the porous medium permeability and the Reynolds number are analyzed for various inclination angles ranging from −90° to +90°.FindingsThe results reveal, essentially, that the inclination angle of the channel can alter substantially the fluid flow and heat transfer mechanisms, especially at high Richardson and Darcy numbers. In this case, the maximum and minimum global Nusselt numbers are reached for α=+90° and α=−90°, respectively.Research limitations/implicationsThe results obtained in this work are valid for an inclined channel with porous blocks attached on the heated parts of the lower plate, whereas the upper wall is thermally insulated.Practical implicationsThe results obtained in this worky can be used in the thermal control of electronic components. The use of porous blocks mounted on the heat sources will increase the rate of heat removal in order to maintain the electronic components at an acceptable operating temperature.Originality/valueThe paper provides an interesting method to improve the cooling of electronic devices by use of a porous medium.

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“…Both numerical and experimental results were reported and it was shown that the convective heat transfer is considerably enhanced by the porous inserts and the corresponding flow resistance increases in a reasonable extent. Huang and Yang [15] presented a numerical investigation of the flow field and heat transfer characteristics of two successive porous-blockmounted heat sources subjected to pulsating channel flow. It was shown that specific choices in some governing parameters can significantly enhance the cooling of the heat sources.…”

Section: Introductionmentioning

confidence: 99%

Non-Newtonian fluid flow in plane channels: Heat transfer enhancement using porous blocks

Nebbali

Bouhadef

2011

International Journal of Thermal Sciences

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Analysis of pulsating convection from two heat sources mounted with porous blocks

Cited by 20 publications

References 23 publications

A Pore-Scale Investigation of the Transient Response of Forced Convection in Porous Media to Inlet Ramp Inputs

A Pore-Scale Investigation of the Transient Response of Forced Convection in Porous Media to Inlet Ramp Inputs

Mixed convection in an inclined channel with heated porous blocks

Non-Newtonian fluid flow in plane channels: Heat transfer enhancement using porous blocks

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