Abstracts - KTH Mechanics

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The interaction between negatively buoyant jets and wave motion: a laboratory model G. Querzoli a and S.Ferrari a A negatively buoyant jet develops when a fluid is released in a less dense receiving environment, as in the case of brine discharges from desalination plants, dense effluents from wastewater treatment plants, oil and/or gas drilling facilities and mineral salt industries, gypsum wastes from fertilizer factories, etc. As these releases tend to go downwards driven by negative buoyancy, they are typically released upwards, with a certain angle on the horizontal, to increase the path before they impact the sea bottom and so to improve dilution. As stated by Chin 1, the dilution in a persistent wavy environment is significantly higher than in a stagnant environment; moreover, whether on one hand the interaction between wave motion and vertical buoyant jets has been largely discussed, on the other the present case has not yet been investigated. For these reasons, with the aim to clarify the influence of surface waves on the behavior of a negatively buoyant jet released upwards at a certain angle, a laboratory model was designed. The experiments were carried out, by means of Light Induced Fluorescence, in a flume furnished with a wavemaker. Buoyant jets with different densimetric Froude numbers were released in both a stagnant and a wavy environment, with ratios between water depth and wave length characteristic of transformation and deep water waves, for various values of wave amplitudes, periods and lengths. These latter values were chosen using data from the Alghero’s buoy (North-West Sardinia), to simulate some typical waves of the Mediterranean Sea. The behavior of the jet is analyzed using the overall mean and variance values together with the ones obtained phase by phase. (a) Figure 1: (a) Instantaneous picture and (b) mean value of the concentration field for the run with Froude = 28.1, wave period = 1.05 s and wave amplitude = 1.25 cm. a DIT (Dipartimento di Ingegneria del Territorio), University of Cagliari, piazza d’Armi, 09123 Cagliari, Italy. 1 Chin, J. Hydraulic Engineering Division, 113(8), 1006 (1987). (b) 191
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EFMC6 KTH Electronic version Abstra
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Euromech Fluid Mechanics Lecturer H
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ii Continuum Models in Industrial A
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iv Slip Behavior at Liquid/Solid In
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viii Premixed Turbulent combustion
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Session 1
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2 Global stability of jets and sens
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4 Control of instabilities in a cav
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Global stability of the rotating di
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Continuous Spectrum Growth and Moda
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The influence of centrifugal buoyan
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Prediction of wall bounded flows us
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Uncertainty Quantification in Large
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Stratified turbulence G. Brethouwer
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Investigations of turbulence statis
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Coupling weather-scale flow with st
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Flow Separation from a Free Surface
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Phase-Field Simulations of Free Bou
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Evaluation of a universal transitio
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Computations of turbulent boundary
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Flow Developments in Smooth Wall Ci
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Super-late stages of boundary-layer
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Low-speed streaks developing at the
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Direct Numerical Simulation of Lami
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Application of the ray-tracing theo
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Leaky Waves in Supersonic Boundary
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Solving turbulent wall flow in 2D u
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58 Upper bounds for the long-time a
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60 Numerical Simulations of Rigid F
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64 A Shell-Model Study of Turbulent
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66 Using CSP for Modeling Burgers-T
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Dynamic Lift of Airfoils R. Grüneb
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72 Experimental study on the bounda
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74 Natural sinuous and varicose bre
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Numerical simulation of the three-d
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Effects of the flexibility of the a
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Wave forerunners of longitudinal st
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Stability and sensitivity analysis
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Stability of reacting gas jets Jose
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Elastocapillarity in wet hairs J. B
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Open Capillary Channel Flows (CCF):
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Stick-slip motion of droplets of co
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Session 4
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Nonlinear long waves on an interfac
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Three-dimensional gravity-capillary
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Linear and non-linear theory of lon
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Surface oscillations of liquid nitr
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Waves above turbulence R. Savelsber
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Figure 1 : Vorticity contours and s
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Investigation of flow structure upo
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Simultaneous density and concentrat
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Introduction of newly developed tow
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136 A Simple Model for Gas-Grain Tw
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140 Stability of dusty gas flow in
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Page 232 and 233: LIST OF AUTHORS Borel H. 340 Castro
Page 234 and 235: LIST OF AUTHORS Glezer A. 259 Haspa
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Page 238 and 239: LIST OF AUTHORS Poplavskaya T. V. 4
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Abstracts - KTH Mechanics

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