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      Simulation of the Internal Wave of a Subsurface Vehicle in a Two-Layer Stratified Fluid

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          Abstract

          Internal waves are one of the various phenomena that occur at sea, and they affect acoustic equipment and sea density measurement equipment. In this study, internal waves are simulated using computational fluid dynamics method in the presence of a submarine in a pre-stratified fluid. Several scenarios were implemented by Froude number changes and submersible velocity by using the Navier-Stokes k-ɛ turbulence model. Results indicate that the realizable k-ɛ turbulence model gives better results than the RNG k-ɛ model and the internal waves flow in this model are well represented, which increases the wavelength of the internal waves by increasing the Froude number and floating velocity, while the internal angle of the Kelvin waves is decreased. We also observe that increasing the floating velocity causes the turbulent velocity contours to increase due to the drag coefficient and its relationship with the Reynolds number. The Reynolds number increases with the increasing velocity of the float motion. The results indicate the efficiency of this method in the discovery of subsurface objects.

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          Author and article information

          Journal
          JOUC
          Journal of Ocean University of China
          Science Press and Springer (China )
          1672-5182
          15 November 2020
          01 December 2020
          : 19
          : 6
          : 1255-1264
          Affiliations
          1Department of Physical Oceanography, Science and Research Branch, Islamic Azad University, Tehran 1477893855, Iran
          2Department of Geodesy, K. N. Toosi University of Technology, Tehran 1996715433, Iran
          3Department of Physical Oceanography, University of Mazandaran, Babol 4741613534, Iran
          Author notes
          *Corresponding author: PIROOZNIA Mahmood, E-mail: ma.pirooznia@ 123456email.kntu.ac.ir
          Article
          s11802-020-4223-9
          10.1007/s11802-020-4223-9
          Copyright © Ocean University of China, Science Press and Springer-Verlag GmbH Germany 2020.

          The copyright to this article, including any graphic elements therein (e.g. illustrations, charts, moving images), is hereby assigned for good and valuable consideration to the editorial office of Journal of Ocean University of China, Science Press and Springer effective if and when the article is accepted for publication and to the extent assignable if assignability is restricted for by applicable law or regulations (e.g. for U.S. government or crown employees).

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          Self URI (journal-page): https://www.springer.com/journal/11802

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