International Journal of Geosciences

Volume 6, Issue 5 (May 2015)

ISSN Print: 2156-8359   ISSN Online: 2156-8367

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ESMD Method for Frequency Distribution of Tank Surface Temperature under Wind Effect

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DOI: 10.4236/ijg.2015.65038    2,539 Downloads   2,909 Views   Citations
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ABSTRACT

Due to the poor understanding of the small-scale processes at the air-water interface, some lab experiments are done in a water tank by infrared techniques. With the help of ESMD method, the stochastic temperature sequences extracted from the infrared photographs are decomposed into several empirical modes of general periodic forms. The corresponding analyses on the modes reveal that, within certain limits, both spatial and temporal frequencies increase along the wind speed. As for the amplitudes, the existence of wind may result in fold increasing of their values. In addition, when the wind speed is added from 4 m/s to 5 m/s, both frequency and amplitude of the surface temperature decrease and it implies an enhanced mixing and a weakened temperature gradient under the force of wind blowing.

Cite this paper

Wang, J. and Fang, X. (2015) ESMD Method for Frequency Distribution of Tank Surface Temperature under Wind Effect. International Journal of Geosciences, 6, 481-486. doi: 10.4236/ijg.2015.65038.

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