Vortex Simulation of the Bubbly Flow around a Hydrofoil

Uchiyama, Tomomi; Degawa, Tomohiro

doi:https://doi.org/10.1155/2007/72697

International Journal of Rotating Machinery

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Research Article | Open Access

Volume 2007 | Article ID 072697 | https://doi.org/10.1155/2007/72697

Vortex Simulation of the Bubbly Flow around a Hydrofoil

Tomomi Uchiyama¹and Tomohiro Degawa²

Academic Editor: Eddie Y. K. Ng

Received18 Mar 2007

Revised07 Jun 2007

Accepted16 Aug 2007

Published03 Oct 2007

Abstract

This study is concerned with the two-dimensional simulation for an air-water bubbly flow around a hydrofoil. The vortex method, proposed by the authors for gas-liquid two-phase free turbulent flow in a prior paper, is applied for the simulation. The liquid vorticity field is discrerized by vortex elements, and the behavior of vortex element and the bubble motion are simultaneously computed by the Lagrangian approach. The effect of bubble motion on the liquid flow is taken into account through the change in the strength of vortex element. The bubbly flow around a hydrofoil of NACA4412 with a chord length 100 mm is simulated. The Reynolds number is 2.5×105, the bubble diameter is 1 mm, and the volumetric flow ratio of bubble to whole fluid is 0.048. It is confirmed that the simulated distributions of air volume fraction and pressure agree well with the trend of the measurement and that the effect of angle of attack on the flow is favorably analyzed. These demonstrate that the vortex method is applicable to the bubbly flow analysis around a hydrofoil.

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Copyright

Copyright © 2007 Tomomi Uchiyama and Tomohiro Degawa. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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