Study on Capillary Filling in V-Grooved Microchannels

• Main Authors: Yuan-Ji Lin, 林彥吉
• Other Authors: Shiu-Wu Chau
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/29081281269511182763

碩士 === 中原大學 === 機械工程研究所 === 93 === The fast development of MEMS technologies encourages extensive studies on the mass and heat transfer phenomena in micro-systems. The microchannel is a kind of extensively applied structure in the field of microsystems, such as bio-chips, micro-fuel cells and micro-heat sinks etc. Therefore, the study on the microchannel flow is very useful from the industrial point of view. This paper discusses the capillary filling process in V-grooved microchannels which are driven by the surface tension. In order to understand the interfacial phenomena of capillary filling, experimental measurements and numerical simulation are employed. Additionally, a theorical model describing the capillary filling behavior is derived. The experimental results show that the filling velocity has a small oscillation in the first 1000μm capillary filling length. By Comparison among with the theorical analysis, numerical simulations and experimental measurements, the capillary filling process in the V-grooved microchannels is found to be related to the Ohnesorge number, dynamic contact angle and dimensionless parameter fRe.