@inproceedings{975087cd86344fa3a3853c3ea9b33b36,
title = "Measurement of gas viscosity using photonic crystal fiber",
abstract = "A new measurement technique for gas viscosity coefficient is designed and demonstrated using the technique of tunable diode laser absorption spectroscopy (TDLAS). Gas flow is driven by a pressure gradient between two gas cells, through a photonic crystal fiber (PCF) surrounded by a furnace for temperature adjustment. PCF with 20-micron diameter affords physical space for gas-light interaction and provides a basis for gas viscosity measurement by determining the time for flow to exit a capillary tube under the influence of a pressure gradient. Infrared radiation from a diode laser is coupled into the fiber to be guided through the gas, and the light attenuation due to absorption from the molecular absorbing species is measured by a photo detector placed at the exit of the fiber. A numerical model from Sharipov and Graur describing local number density distribution in a unsteady state is applied for the determination of gas viscosity, based on the number density of gas measured by the absorption of the laser light, using the Beer-Lambert law. The measurement system is confirmed by measuring the viscosity of CO2 as a reference gas.",
author = "Gao, {R. K.} and Sheehe, {S. L.} and J. Kurtz and S. O'Byrne",
year = "2016",
month = nov,
day = "15",
doi = "10.1063/1.4967601",
language = "English",
series = "AIP Conference Proceedings",
publisher = "American Institute of Physics Inc.",
editor = "Henning Struchtrup and Andrew Ketsdever",
booktitle = "30th International Symposium on Rarefied Gas Dynamics, RGD 2016",
address = "United States",
note = "30th International Symposium on Rarefied Gas Dynamics, RGD 2016 ; Conference date: 10-07-2016 Through 15-07-2016",
}