An experiment in a rectangular basin of water is used to demonstrate that a large-scale circulation will result from a zero-mean thermal forcing. The thermal force is a spatially periodic pattern of heating and cooling at the top surface, achieved with an interdigitated array of hot and cold tubes. The experimental results show a very robust, steady flow with ascending flows at each end of the tank and a single descending jet near the left wall. These results suggest that small-scale forcing in surface-driven flows may result in significant large-scale subsurface motion.
Large-Scale Circulation in a Rectangular Enclosure With Periodic Boundary Temperature
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received September 6, 2011; final manuscript received January 7, 2013; published online April 17, 2013. Assoc. Editor: Mark F. Tachie.
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Sitarski, D., Lee, R. J., Saylor, J. R., and McHugh, J. P. (April 17, 2013). "Large-Scale Circulation in a Rectangular Enclosure With Periodic Boundary Temperature." ASME. J. Fluids Eng. July 2013; 135(7): 071201. https://doi.org/10.1115/1.4024011
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