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Numerical study of the behavior of heated water discharged into the ocean

Part 2: Parameter dependence
  • Takeshi Matsuno
  • Yutaka Nagata
Article

Abstract

Matsuno and Nagata (1987) showed numerically that the spreading characteristics of the discharged heated water from power plants of existing scale is significantly influenced by the earth's rotation effect. Although the effect of the enhancement of the Coriolis parameter on the spreading characteristics of the formed warm water mass was discussed in order to demonstrate the rotation effect, other parameters such as the density difference between the discharged heated water and ambient water and the vertical eddy viscosity and diffusivity were fixed. In this paper, the dependence of the spreading characteristics on these parameters is examined. Then, it is shown that the overall shape of the formed warm water mass and density and velocity structure strongly depend on these parameters. Also, it is indicated that the behavior of the warm water mass under the rotation effects is too complicated to be described with a few parameters. For example, the internal radius of deformation seems to be one of the determinative parameters, and the increase of the density difference between discharged water and ambient water has a similar effect on the shape of the formed warm water mass as a decrease of the Coriolis parameter. However, a change of the two values has different effects on the detailed density structure and current structure of the warm water mass. The Prandtl number seems to determine some aspects of the veloczty field such as velocity magnitude and width of the southward flowing current zone. However, other features such as the thickness of the warm water mass are not determined by the Prandtl number.

Keywords

Prandtl Number Velocity Structure Density Difference Eddy Viscosity Density Structure 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Harashima, A., Y. Oonishi and H. Kunishi (1978): Formation of water masses and fronts due to density-induced current system. J. Oceanogr. Soc. Japan,34, 57–66.Google Scholar
  2. Matsuno, T. and Y. Nagata (1987): Numerical study of the behavior of heated water discharged into the ocean. Part 1: the effect of earth's rotation. J. Oceanogr. Soc. Japan,43, 295–308.Google Scholar
  3. Murakami, M., Y. Oonishi and H. Kunishi (1985): A numerical simulation of the distribution of water temperature and salinity in the Seto Inland Sea. J. Oceanogr. Soc. Japan,41, 213–224.Google Scholar
  4. Nagata, Y., Y. Michida and K. Nakai (1984): Experimental study on the effects of the earth's rotation on behavior of discharged hot water, Pater II. Proc. 31st Japanese Conf. on Coastal Eng., 625–629 (in Japanese).Google Scholar

Copyright information

© Oceanographical Society of Japan 1989

Authors and Affiliations

  • Takeshi Matsuno
    • 1
  • Yutaka Nagata
    • 2
  1. 1.Faculty of FisheriesNagasaki UniversityNagasakiJapan
  2. 2.Geophysical InstituteUniversity of TokyoTokyoJapan

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