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Experimental Study of Stratification in a Liquid Storage Tank With a Porous Manifold

[+] Author Affiliations
N. M. Brown

University of Technology, Kingston, Jamaica

F. C. Lai

University of Oklahoma, Norman, OK

Paper No. HT-FED2004-56037, pp. 21-28; 8 pages
doi:10.1115/HT-FED2004-56037
From:
  • ASME 2004 Heat Transfer/Fluids Engineering Summer Conference
  • Volume 4
  • Charlotte, North Carolina, USA, July 11–15, 2004
  • Conference Sponsors: Heat Transfer Division and Fluids Engineering Division
  • ISBN: 0-7918-4693-8 | eISBN: 0-7918-3740-8
  • Copyright © 2004 by ASME

abstract

Experiments were conducted to investigate the effectiveness of a porous manifold in the formation and maintenance of thermal stratification in a liquid storage tank. A thermal storage tank with a capacity of 315 liters and a diameter-to-height ratio of 2 was used for the experiment. The porous manifold used was made from rolling up a nylon screen into the shape of a tube. Stratification was observed at a Richardson number as low as Ri = 0.615. Flow visualization was also performed to confirm the effectiveness of the porous manifold in the promotion and maintenance of stable thermal stratification. From the results of flow visualization, one can conclude that a porous manifold is able to reduce the shear-induced mixing between fluids of different temperature, and thus is able to promote and maintain a stable stratification.

Copyright © 2004 by ASME

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