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An engineering analysis of transient laminar flows in long microchannels
Author(s) -
Eskin Dmitry
Publication year - 2013
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.21661
Subject(s) - laminar flow , microchannel , transient (computer programming) , mechanics , transient flow , channel (broadcasting) , flow (mathematics) , open channel flow , viscosity , transient analysis , materials science , transient response , thermodynamics , engineering , physics , surge , computer science , electrical engineering , operating system
An engineering model of a transient laminar flow from a pressurised vessel through a long microchannel under a condition of a rapid valve opening at a channel outlet is developed. A valve at the channel outlet, which is opening with a given speed, is modelled as a time‐dependent boundary condition. Transient flows are investigated numerically by the method of characteristics. The calculations show that variations of pressure and velocity distributions along the channel over time, caused by a transient flow regime, decrease with a decrease in the channel diameter and the channel length, an increase in the time of valve opening and an increase in the fluid viscosity. © 2012 Canadian Society for Chemical Engineering
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