Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Fluid Dynamics
Volume 56, Number 18
Sunday–Tuesday, November 20–22, 2011; Baltimore, Maryland
Session H13: Multiphase Flow IV: Numerical I
10:30 AM–12:40 PM,
Monday, November 21, 2011
Chair: Olivier Desjardins, Cornell University
Abstract ID: BAPS.2011.DFD.H13.4
Abstract: H13.00004 : Numerical investigation of a turbulent hydraulic jump: Interface statistics and air entrainment*
11:09 AM–11:22 AM
Preview Abstract Abstract
(Graduate student at Stanford University)
(Post-doctoral fellow at Stanford University)
(Post-doctoral fellow at MIT)
(Franklin and Caroline Johnson Professor of Mechanical Engineering, Stanford University)
The objective of this study is to develop an understanding of formation of bubbles due to turbulence/interface interactions and nonlinear surface wave phenomena. As a model problem a statistically stationary turbulent hydraulic jump has been considered. Turbulent hydraulic jump with an inflow Froude number of 2 and Reynolds number of 88000--based on inflow height--has been numerically simulated. Based on typical air- water systems, a density ratio of 831 has been selected for our calculations. A refined level-set method is employed to track the detailed dynamics of the interface evolution. Comparison of flow statistics with experimental results of Murzyn et al. (Int. J. Multiphase Flow, 2005) will be presented. The probability density function of principal curvatures of the air- water interface and curvature distribution patterns in the chaotic regions are investigated. The importance of liquid impact events in bubble generation will be discussed.
*Supported by the Office of Naval Research, with Dr. Pat Purtell, program manager.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.DFD.H13.4
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