Table of Contents
ISRN Spectroscopy
Volume 2013 (2013), Article ID 681654, 4 pages
Research Article

Internal Energy Level Population Redistribution of Carbon Dioxide in Laminar and Turbulent Flow

1Department of Physics, Hong Kong University for Science and Technology, Kowloon, Hong Kong
2Department of Electrical Engineering, Columbia University, New York, NY, USA
3Department of Philosophy, Harvard University, Cambridge, MA 02138, USA

Received 19 February 2013; Accepted 21 March 2013

Academic Editors: A. Huczynski and M. Mączka

Copyright © 2013 Wisely Wong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We show clear experimental evidence that in the laminar flow regime, there is a continuous redistribution of population on different vibrorotational energy levels as the flow rate increases. Such redistribution comes to an abrupt stop when the flow changes to turbulence. The population distribution then remains almost unchanged even up to the flow rate 10 times the laminar to turbulent transition. The flow status of carbon dioxide is therefore closely related to its internal energy level population distribution.