Numerical investigation on the heat transfer characteristics of liquid-liquid plug-train in microchannels

被引：1

作者：

Xu, Bin ^{[1
]}

Wong, Teck Neng ^{[2
]}

Zhang, Desheng ^{[1
]}

Shen, Xi ^{[1
]}

Xu, Rongjun ^{[3
]}

机构：

[1] Jiangsu Univ, Res Ctr Fluid Machinery Engn & Technol, 301 Xuefu Rd, Zhenjiang 212013, Jiangsu, Peoples R China

[2] Nanyang Technol Univ, Sch Mech & Aerosp Engn, 50 Nanyang Ave, Singapore 639798, Singapore

[3] Nanjing Lanshen Pump Corp Ltd, Nanjing 211500, Jiangsu, Peoples R China

来源：

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION | 2019年 / 143卷

关键词：

Heat transfer; Plug-train; Vortices; Multiphase microfluidics; FLOW; SIMULATION; EQUATIONS; DROPLET; VOLUME;

D O I：

10.1016/j.cep.2019.107592

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Liquid-liquid plug-train is of great importance due to its wide applications in the heat transfer enhancement and the richness of underlying physics. This paper presented a theoretical and numerical study of the liquid-liquid plug-train in a microchannel. Based on the analytical model of flow field, the heat transfer process in liquid-liquid plug-train was investigated. The constant surface temperature boundary condition was considered. Nusselt number (Nu) and heat transfer index (eta) were employed to evaluate the heat transfer characteristics of liquid-liquid plug-train in the microchannel. Three stages of the heat transfer process in liquid-liquid plug-train were identified: (i) development of thermal boundary layer (TBL); (ii) advection of heated/fresh fluid in the liquid-liquid plug train; and (iii) thermally fully developed flow. The effects of the thermal conductivity ratio and the plug length ratio were investigated. A low plug length ratio was found to be effective in heat transfer enhancement in the microchannel.

引用

页数：10

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