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| Title: | EXTRA STRAIN RATES IN SPILLING BREAKING WAVES | |
| DOI No: | 10.1142/9789812701916_0028 | |
| Source: | COASTAL ENGINEERING 2004 (pp 370-378) | |
| Author(s): | S. K. MISRA
University of Delaware, Newark, DE 19716, USA J. T. KIRBY University of Delaware, Newark, DE 19716, USA M. BROCCHINI DIAM, Universita' di Genova, Via Montallegro 1, 16145 Genova, Italy M. THOMAS University of Delaware, Newark, DE 19716, USA F. VERON University of Delaware, Newark, DE 19716, USA C. KAMBHAMETTU University of Delaware, Newark, DE 19716, USA |
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| Abstract: | This paper explores the effect of extra strain rates on the turbulence structure of quasi-steady spilling breaking waves. A theoretical model for the single phase turbulent thin layer is developed and the importance of various strain rate terms are analyzed using a perturbation of the governing equations in terms of kinematic and geometric parameters. We find that the effect of extra strain rates is felt at a higher order than the mean simple shear. The theoretical prediction is compared to experimental data obtained from a Particle Image Velocimetry study of a turbulent hydraulic jump. In the breaker mixing layer, the Reynolds shear stress and turbulent kinetic energy distributions don't follow the mean simple shear distribution; instead, they show a correlation with the extra strain induced by streamline curvature. | |
| Full Text: | View full text in PDF format (400KB) | |
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