Hydrodynamics and Heat Transfer Characteristics of a Double Gradient Microchannel Porous Model: Fixed Gradients and Variable Gradients Structures,Advanced Theory and Simulations

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Hydrodynamics and Heat Transfer Characteristics of a Double Gradient Microchannel Porous Model: Fixed Gradients and Variable Gradients Structures
Advanced Theory and Simulations ( IF 2.9 ) Pub Date : 2020-02-13 , DOI: 10.1002/adts.201900238
Xiangyang Chen ₁ , Jie Liu ₁ , Yanbin Fan ₁

Affiliation

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.

中文翻译：

双梯度微通道多孔模型的流体动力学和传热特性：固定梯度和可变梯度结构

流体燃料催化反应制氢是当前研究的热点，催化剂载体是制氢过程的核心。可变梯度结构和固定梯度结构之间的关系仍然不清楚。研究了双梯度和固定梯度微通道多孔模型的流体动力学和传热特性。提出了使用均匀插值法研究连续性方程规律的策略。有三个主要发现。首先，可变梯度模型的内部流体速度大于固定梯度模型的内部流体速度。其次，可变梯度结构的总体温度变化大于对照组的温度变化。第三，从理论上讲，基于区域的流体的宏观平均温度变化公式是可靠的。这些发现可能有助于提高微通道多孔催化载体的催化效率。

更新日期：2020-03-04

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