Combined Effects of Wind and Streamflow on Gas-Liquid Transfer Rate
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Volume 135, Issue 8
Abstract
A theoretical model is developed to predict the wind-streamflow-driven gas-liquid transfer rate. When wind blows over the stream surface, turbulence is generated at both the air-water interface and the water-bed interface, which is the driving force of the surface renewal movement of water parcels. The total surface renewal rate is considered as the sum of the effective surface renewal rates driven by the turbulence generated at these two interfaces. The gas-liquid transfer rate is formulated as a function of the total surface renewal rate based on the surface renewal theory. The concept of serial resistance, shear velocity, and effective viscous layer play significant roles in the model development. This model correlates the gas-liquid transfer rate with the dynamic fluid parameters such as wind speed and stream velocity. The predictions of this model show good agreement with existing experimental data. This model can be applied to predict the gas-liquid transfer rate in wind-streamflow-driven systems.
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Acknowledgments
The writers acknowledge help from Dr. Dennis D. Truax and Dr. David H. Bridges during this study. Financial support was provided from the Kelly Gene Cook, Sr. Endowment at Mississippi State University.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 135 • Issue 8 • August 2009
Pages: 653 - 659
Copyright
© 2009 ASCE.
History
Received: Jul 30, 2007
Accepted: Feb 18, 2009
Published online: Jul 15, 2009
Published in print: Aug 2009
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