HEAT TRANSFER AND FLOW CHARACTERISTICS IN CONDUCTIVE POROUS MEDIA WITH ENERGY GENERATION

1970 ◽  
Author(s):  
W.U. Choudhury ◽  
M. M. El-Wakil
Keyword(s):  
Heat Transfer ◽  
Porous Media ◽  
Flow Characteristics ◽  
Energy Generation

scholarly journals Study on Flow and Heat Transfer Characteristics of Porous Media in Engine Particulate Filters Based on Lattice Boltzmann Method

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3319
Author(s):  
Jiale Fu ◽  
Tiechen Zhang ◽  
Menghan Li ◽  
Su Li ◽  
Xianglin Zhong ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Porous Media ◽  
Lattice Boltzmann ◽  
Great Influence ◽  
Flow Characteristics ◽  
Filtration Efficiency ◽  
Darcy Law ◽  
Ordered Structure ◽  
Particulate Filters

To investigate the laminar flow characteristics of porous media in the inner core of engine particulate filters, a two-dimensional lattice Boltzmann–Cellular Automata (LB–CA) probabilistic model is used to simulate the flow characteristics of porous media. The variation of dimensionless permeability of various numerical structures on pore scale with Reynolds number is analyzed, and the heat transfer as well as particle filtration are considered. The results show that the flow law of different structures obeys Darcy law under the condition of low Reynolds number (Re < 1). The dimensionless permeability coefficient of the ordered structure is significantly higher than that of the disordered structure; however. the filtration efficiency of the ordered structure decreases. With the increase of Reynolds number, the heat transfer increases. Furthermore, it is found that the particle size has a great influence on the filtration efficiency.

Flow Characteristics and Convection Heat Transfer in Microporous Media

2008 ◽  
Author(s):  
Pei-Xue Jiang ◽  
Rui-Na Xu ◽  
Chen-Ru Zhao
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Porous Media ◽  
Slip Flow ◽  
Convection Heat Transfer ◽  
Flow Characteristics ◽  
Flow In Porous Media ◽  
Convection Heat ◽  
Microporous Media ◽  
Internal Convection

The flow characteristics of water and air in micro porous tubes with average diameters of 200 μm ∼ 10 μm were studied experimentally and numerically. The results showed that compressibility significantly influence the air flow in porous media with the particle diameters of 200 μm ∼ 10 μm, which increases the friction factor in porous media. Rarefaction effects occur in air flows in the microporous media with particle diameters less than 90 μm. New correlations for K and F were proposed with consideration of Kn. The numerically predicted friction factors for the slip-flow regime in the micro-porous media with 90 μm ∼ 10 μm diameter particles were less than the known correlation and close to the experimental data. The internal convection heat transfer coefficients between particles and fluid in the micro porous media were determined experimentally and numerically. The experimental data for the micro porous media with particle diameters of 20 and 10 μm are much lower than the previously published results. A new correlation for Nusslet number was proposed with consideration of the influence of Kn. Numerical calculation with consideration of slip-flow and temperature jump in micro porous media can properly simulate internal convection heat transfer.

INTERFACIAL CONVECTIVE HEAT TRANSFER FOR RANDOMLY GENERATED POROUS MEDIA

2018 ◽  
Vol 49 (1) ◽  
pp. 77-90
Author(s):  
Eren Ucar ◽  
Moghtada Mobedi ◽  
Azita Ahmadi
Keyword(s):  
Heat Transfer ◽  
Porous Media ◽  
Convective Heat Transfer ◽  
Convective Heat
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