Effects of solid-liquid intermolecular interactions on liquid flow and heat transfer in microtubes

2018 International Conference on Advanced Materials, Intelligent Manufacturing and Automation

材料科学;机械制造;运输工程

Li, Xiaolong^1 ; Chen, Xiaoqian^1 ; Huang, Yiyong^1

College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan

410073, China^1

关键词: Apparent viscosity;    Conventional theory;    Flow and heat transfer;    Flow frictions;    Hamaker theory;    Interface effect;    Intermolecular interactions;    Solid-liquid;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/382/3/032039/pdf
DOI  :  10.1088/1757-899X/382/3/032039

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

This paper investigates the laminar flow and heat transfer characteristics of liquid in microtubes by considering the solid-liquid intermolecular interactions. We propose an apparent viscosity model of liquid from the wetting theory and the Hamaker theory to account for the interface effect. The numerical simulation considering this model is conducted to study the flow and heat transfer characteristics of liquid in microtubes. Simulation results indicate that the flow and heat transfer characteristics such as velocity distribution, pressure drop, flow friction and heat transfer coefficient deviate from the predictions of the conventional theory. The deviation increases as the hydrophilicity or hydrophobicity increases, and decreases as the diameter of the microtube increases.