On the interaction of a turbulent jet with waves

In the present study, the flow field of a momentum jet discharged vertically into a wave environment has been investigated. Three distinct processes which increase the dilution rate of the pollutant concentration have been identified by the flow visualization method. They are jet deflection, “wave tractive mechanism”, and wake vortex structure. A highly precise LIF-LDV system was developed to measure simultaneously the two-dimensional velocity field and tracer concentration. The measurements show dramatic variations not only in the longitudinal distribution of the mean jet axis but also in the cross-sectional profiles. A realistic model is also derived to estimate the initial dilution rate under the wave action.

[1]  A. Hussain,et al.  The mechanics of an organized wave in turbulent shear flow , 1970, Journal of Fluid Mechanics.

[2]  J. G. Palfery,et al.  Vortex shedding from a turbulent jet in a cross-wind , 1971, Journal of Fluid Mechanics.

[3]  Yang-Yih Chen,et al.  Theoretical study of turbulent plane jet interacting with small amplitude wave , 1981 .

[4]  K. Drexhage.  Structure and Properties of Laser Dyes , 1973 .

[5]  David A. Chin,et al.  Influence of Surface Waves on Outfall Dilution , 1987 .

[6]  Hwung-Hweng Hwung,et al.  Wave effects on the mean flow characteristics of turbulent round jets , 1991 .

[7]  M. G. Dodson,et al.  The turbulent concentration field of a methane jet , 1978, Journal of Fluid Mechanics.

[8]  H. C. Hottel,et al.  The nozzle-fluid concentration field of the round, turbulent, free jet , 1967, Journal of Fluid Mechanics.

[9]  R. Wiegel,et al.  Opposing Wave Effect on Momentum Jets Spreading Rate , 1983 .

[10]  E. John List,et al.  Investigations of round vertical turbulent buoyant jets , 1988, Journal of Fluid Mechanics.

[11]  H. Fischer.  Mixing in Inland and Coastal Waters , 1979 .

[12]  Maurice L. Albertson,et al.  Diffusion of Submerged Jets , 1948 .

[13]  Z. Moussa,et al.  The near field in the mixing of a round jet with a cross-stream , 1977, Journal of Fluid Mechanics.

[14]  Hwung-Hweng Hwung,et al.  The vortex structures of round jets in water waves , 1990 .

[15]  H. Hwung,et al.  The investigation of turbulent characteristics in the surf zone by LDV , 1988 .

[16]  W. Rodi,et al.  Experimental investigation of jets in a crossflow , 1982, Journal of Fluid Mechanics.

[17]  Israel J Wygnanski,et al.  Some measurements in the self-preserving jet , 1969, Journal of Fluid Mechanics.

[18]  D. Chin.  Model of Buoyant‐JET‐Surface‐Wave Interaction , 1988 .

[19]  S. Corrsin,et al.  Further experiments on the flow and heat transfer in a heated turbulent air jet , 1947 .