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Consideration of Sub-Surface Vortices in Suction Sump Using LES

[+] Author Affiliations
Shigeyuki Tomimatsu

DMW Corporation, Mishima, Japan

Yoshinobu Yamade

Mizuho Information & Research Institute, Inc., Chiyoda-ku, Japan

Huilai Zhang

Numerical Flow Designing Co., Ltd., Shinagawa-ku, Japan

Paper No. AJKFluids2015-33190, pp. V01AT33A002; 6 pages
doi:10.1115/AJKFluids2015-33190
From:
  • ASME/JSME/KSME 2015 Joint Fluids Engineering Conference
  • Volume 1A: Symposia, Part 2
  • Seoul, South Korea, July 26–31, 2015
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-5721-3
  • Copyright © 2015 by JSME

abstract

In this study, sub-surface vortices generated in a suction sump are simulated. In an experimental model test, sub-surface vortices are qualitatively observed under a bell mouth. Vortex core lines corresponding approximately to sub-surface vortices are visualized when a fine mesh model is used. On the other hand, it is impossible to visualize the vortex core line when a coarse mesh model is used. Therefore, it is obvious that analytical accuracy is improved by using the fine mesh model. However, it is also obvious that a longer total simulation run time is necessary when using the fine mesh model; a significant problem for practical engineers. In this paper, the effects of mesh models are mainly investigated using coarse and fine mesh models. The fine mesh model is generated by refining the coarse mesh model and indicates that a high performance computing technique is an effective approach for suction sump simulation.

Copyright © 2015 by JSME
Topics: Suction , Vortices

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