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Hydrodynamics and Heat Transfer Characteristics of a Double Gradient Microchannel Porous Model: Fixed Gradients and Variable Gradients Structures
Author(s) -
Chen Xiangyang,
Liu Jie,
Fan Yanbin
Publication year - 2020
Publication title -
advanced theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.068
H-Index - 17
ISSN - 2513-0390
DOI - 10.1002/adts.201900238
Subject(s) - temperature gradient , heat transfer , microchannel , mechanics , velocity gradient , materials science , porosity , pressure gradient , porous medium , thermodynamics , concentration gradient , chemistry , physics , chromatography , composite material , meteorology
Hydrogen production from fluid fuel catalytic reaction is currently a hot research topic and catalyst carriers are the core of the hydrogen production process. The relationship between variable gradient structure and fixed gradient structure is still unclear. The hydrodynamics and heat transfer characteristics of double gradient and fixed gradient microchannel porous models are investigated. A strategy of using a uniform interpolation method to investigate the laws of a continuity equation is developed. There are three major findings. First, the internal fluid velocity of the variable gradient model is greater than the internal fluid velocity of the fixed gradient model. Second, the overall temperature change of the variable gradient structure is greater than the temperature change of the control group. Third, the formula of the macroscopic average temperature change of the area‐based fluid is found to be theoretically reliable. These findings may contribute to improving the catalytic efficiency of microchannel porous catalytic supports.