工程设计学报2018，Vol.25Issue(3)：321-329,9.DOI:10.3785/j.issn.1006-754X.2018.03.011
粗糙度对微流道内流体连续自搬运的影响
Effect of roughness on continuous directional transport of fluid in microchannel
摘要
Abstract
The transport of samples in functional units of a microfluidic chip depends on the flow of the liquid in the microchannel .Scale effect aggravates the surface effect,w hich makes the flow in the microchannel possible to spread continuously without external power .In order to research flow mechanism and kinetic characteristics in microchannel intensively,influence factors of con-tinuous directional transport in microchannel were analyzed based on the Derjaguin approximation,surface energy and Casimir effect,influences of surface roughness on flow char-acteristics and continuous directional transport efficiency in the microchannel were analyzed by both computational and experimental methods,and constitutive equations and flow control equa-tions for fluids were defined .All above results were verified effective and credible .The results in-dicated that roughness of the inner wall was a very important factor affecting flow characteristics and continuous directional liquid transport efficiency in the microchannel .T he variation of equiva-lent tooth number,tooth height or dip angle of tooth brought prominent change of main vortex and concomitant vortex in clearance flow near inner wall,which would cause the continuous di-rectional transport efficiency of microfluidic change .The thesis provides some insights and refer- ences for the design operational management of microfluidic lubrication,friction reduction,anti-sticking,as well as miniaturization and integration in micro electro mechanical systems .关键词
微流控芯片/连续自搬运/粗糙度/Casimir效应/表面能梯度Key words
microfluidic chip/continuous directional transport/roughness/Casimir effect/surface energy gradient分类
机械制造引用本文复制引用
陈娅君,龙威,杨绍华,柴辉,巨少华..粗糙度对微流道内流体连续自搬运的影响[J].工程设计学报,2018,25(3):321-329,9.基金项目
国家自然科学基金-云南联合基金资助项目(U1302271) （U1302271）
