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Isothermal helium flow measurements twrough a rectangular channel for a Wide Knudsen range

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1928/20750

Isothermal helium flow measurements twrough a rectangular channel for a Wide Knudsen range

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Title: Isothermal helium flow measurements twrough a rectangular channel for a Wide Knudsen range
Author: Anderson, John
Advisor(s): Khraishi, Tariq
Committee Member(s): Shen, Yu-Lin
Manginell, Ron
Department: University of New Mexico. Dept. of Mechanical Engineering
Subject(s): Knudsen
Flow
Microchannel
LC Subject(s): Helium--Fluid dynamics.
Free molecular flow.
Microreactors.
Degree Level: Masters
Abstract: The purpose of this experimental investigation is to measure the isothermal steady flow of Helium through a rectangular microchannel from the continuum to the free-molecular regime. The intention is to expand the measured Knudsen number range for rectangular cross section microchannels as compared with that presently found in in the literature. As presented, the Knudsen range for the experiments is 0.03 to overnearly 500. A dual tank accumulation technique was chosen for flow measurements which allows for very low flow rate measurements (<〖10〗^(-13) kgs^(-1)). Experimental results were evaluated against analytical solutions for the continuum, slip, and free molecular regimes as well as a closed-form equation that would include any regime. Data was also compared to computer models using the Direct Simulation Monte Carlo method.
Graduation Date: May 2012
URI: http://hdl.handle.net/1928/20750

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