Modeling and Experimental Characterization of Pressure Drop in Gravity-Driven Microfluidic Systems

Autor:	Nathaniel Narra Girish, Antti-Juhana Mäki, Joose Kreutzer, Samu Hemmilä, Jari Hyttinen, Juha Hirvonen, Pasi Kallio
Rok vydání:	2014
Předmět:	Physics::Fluid Dynamics Pressure drop Gravity (chemistry) Materials science Gravity force Mechanical Engineering Microfluidics Mechanics Characterization (materials science)
Zdroj:	Journal of Fluids Engineering. 137
ISSN:	1528-901X 0098-2202
DOI:	10.1115/1.4028501
Popis:	Passive pumping using gravity-driven flow is a fascinating approach for microfluidic systems. When designing a passive pumping system, generated flow rates should be known precisely. While reported models used to estimate the flow rates do not usually consider capillary forces, this paper shows that their exclusion is unrealistic in typical gravity-driven systems. Therefore, we propose a new analytical model to estimate the generated flow rates. An extensive set of measurements is used to verify that the proposed model provides a remarkably more precise approximation of the real flow rates compared to the previous models. It is suggested that the developed model should be used when designing a gravity-driven pumping system.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8777e25b102fa6e93aaddb1a058ee4dd https://doi.org/10.1115/1.4028501 Zobrazit plný text záznamu