Proceedings of the 5th International Conference on Jets, Wakes and Separated Flows (ICJWSF2015)

Front Cover
Antonio Segalini
Springer, Jul 18, 2016 - Technology & Engineering - 620 pages

This volume collects various contributions from the 5th International Conference on Jets, Wakes and Separated Flows (ICJWSF2015) that took place in Stockholm during June 2015. Researchers from all around the world presented their latest results concerning fundamental and applied aspects of fluid dynamics. With its general character, the conference embraced many aspects of fluid dynamics, such as shear flows, multiphase flows and vortex flows, for instance. The structure of the present book reflects the variety of topics treated within the conference i.e. Jets, Wakes, Separated flows, Vehicle aerodynamics, Wall-bounded and confined flows, Noise, Turbomachinery flows, Multiphase and reacting flows, Vortex dynamics, Energy-related flows and a section dedicated to Numerical analyses.

 

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Contents

Analysis of Vortical Structures in Intermittent Jets
3
2 Flow Structure of a Round Jet with SideJet Formation
11
3 Flow and Heat Transfer Features of an Impinging Annular Jet
19
4 Investigation of the Flow in Free and Impinging Air Micro and Macrojets
29
Numerical Investigation of a Confined Jet Array Penetrating into a Counterflow
36
6 Coherent Structures in a Turbulent Swirling Jet Under Vortex Breakdown 3D PIV Measurements
43
7 An Effect of Initial Disturbance on Spatial Development of a TwoDimensional Jet at a Low Reynolds Number
51
Effect of Buoyancy on the Instability of Light Jets and Plumes
61
40 Wall Similarity in Turbulent Boundary Layers Subjected to Weak Pressure Gradients
317
Interaction Layer Between a Turbulent Boundary Layer and FreeStream Turbulence
325
Generalization of the Diagnostic Plot to HigherOrder Moments in Turbulent Boundary Layers
333
Experimental and Analytical Investigation of Forest Clearings
339
44 Flow and Heat Transfer of Petal Shaped Double TubeEffects of Pipe Geometry
347
Loss Reduction of the Flow in the Reducing Elbow Duct by Using Weir Shaped Small Obstacle
355
Flow Field Characteristics and Energy Injection in a Tank Stirred by Regular and Fractal Blade Impellers
363
Noise
370

Direct Numerical Simulation of DynamicRotational Controlled Jet
68
Enhancement of Turbulent Diffusion in an Axisymmetric Jet by Vortex Generators
77
11 Diffusion Control of Jet by Acoustically Driven Secondary Film Flow
85
Numerical Simulation of Flow Structure and Heat Transfer in a Swirling GasDroplet Turbulent Flow Through a Pipe Expansion
92
13 The Influence of an Asymmetric Slot on the Flow Characteristics of Synthetic Jets
101
14 Performance Characteristics of a Fan Using Synthetic Jets
109
Wakes
116
Towards Local Isotropy of Higher Order Statistics in Wakes
119
Heat Transfer Enhancement by GridGenerated Turbulence for a Cylinder in Crossflow
125
An Experimental Study on the Relation Between the Wake Inlet Conditions and the Near Wake Topology
133
18 Vortex Structure Extraction from Circular Disk Wake by POD and PIV Processing
139
Subharmonic Lockin and Phase Synchronizaton
146
20 Organization of an Axisymmetric Turbulent Wake in Presence of a Central Protrusion
157
Global Linear Stability Analysis of the Flow Around a Superhydrophobic Circular Cylinder
164
22 Optimal Cancelation of Vortex Street in Flow Past a Circular Cylinder with Controllable Wettability Properties
171
23 Numerical Experiment of Flow Characteristics of a Circular Cylinder with Splitter Plate
181
Wake Structures of a Particle in Straight and Curved Flows
189
Numerical Flow Simulations of a Flexible Plate Attached to an Obstacle in Crossflow
195
Effect of Chordwise Flexibility on Flapping Wing Aerodynamics
202
Separated Flows
211
Characteristics of Recirculation Regions on Ribs of Varying Length
213
Passive Load Control in BackwardFacing Step Flow by Using Chevrons
222
29 Active Flow Control Behind a Backward Facing Step Using a ZeroNetMassFlux System
231
Control of the Reattachment Length of a Transonic 2D BackwardFacing Step Flow
241
31 POD Analysis of Jet and Vortex Flows Induced by Oscillating Backward Facing Step
249
Characterization of the Massively Separated Wake Behind a Square Cylinder by Means of Direct Numerical Simulation
258
33 Investigations on the Effects of Trip Wires on the Performances of a Rectangular Wing
267
Vehicle Aerodynamics
274
Comparison of Synthetic and Pulsed Jets Effect for the Flow Around the Ahmed Body
275
Large Eddy Simulations of Flow Around Two Generic Vehicles in a Platoon
283
Numerical Study of Aerodynamic Interactions in a Homogeneous Multivehicle Formation
289
Numerical Investigation of the Actuated Flow on a Bluff Body
295
WallBounded and Confined Flows
303
Breakdown of a LowSpeed Streak Caused by Turbulent Fluctuations
305
Advection of a Coherent Structure in a Turbulent Boundary Layer
311
47 Numerical Study on the Sound Amplification of a TJunction with Bias Flow
373
Experiments on Sound Radiation in Flow Past Two SidebySide Square Cylinders
382
Turbulent Jet Noise Simulation and Propagation Using a 3rd Order MUSCLCD Scheme on Unstructured Grid and FfowcsWilliams Hawkings
389
Investigation of the Effect of a Realistic Nozzle Geometry on the Jet Development
399
Linear Stability Analyses and Large Eddy Simulations for Acoustic Wave Generation Mechanism of a Transitional Supersonic Jet
406
Can Jet Noise Be Predicted Using Linear Instability Wavepackets?
413
Turbomachinery Flows
419
53 A Numerical Model of Fluid Structure Interaction of a Fluttering Valve
421
54 Capacity Testing and Local Flow Analysis of Geometrically Complex Trims Installed Within a Commercial Control Valve
430
55 Wall Treatment Effects on the Heat Transfer in a Radial Turbine Turbocharger
439
On the Characteristics of the Jet in Film Cooling Applications
449
Similarities and Differences Concerning Flow Characteristics in Centrifugal Compressors of Different Size
456
Multiphase and Reacting Flows
465
58 Study of Liquid Breakup Mechanism Through a HighSpeed Gas Flow
467
Clustering and Settling of Inertial Particles in Turbulence
475
60 On Mechanics of Turbulent GasLiquid Flows
483
61 Film Behavior of TwoPhase Flow in a Horizontal Pipe with a Sudden Contraction
492
62 Some Aspects of Design and Modelling of Multiphase Separation Process in Complex Channels Under Magnetic Fields
501
Tire Water Splash Modeling
509
Algorithm for Automatic Quantification of Flashback and Flash Forward Events from HighSpeed Chemiluminescence Recordings
519
65 Effect of Grouping of Fuel Droplets on a Flame Formed by an Oscillating Spray Jet
527
66 Influence of Coaxial Dielectric Barrier Discharge Plasma Actuator on Jet Flame
537
Vortex Dynamics
545
67 Vortex Rings Formed Behind a FreeFlight Butterfly and Their Dynamic Behaviors
546
68 Experimental and Computational Observation of Air Bubble Ring Due to Plughole Vortex
555
69 Penetration by a Negatively Buoyant Vortex Ring
564
EnergyRelated Flows
571
70 Development of Near Wake of a HAWT Depending on Hub Height
573
A Study of Vertical Axis Wind Turbines
581
72 Performance Comparison of a Vertical Axis Wind Turbine Using Commercial and Open Source Computational Fluid Dynamics Based Codes
588
Measurement and Control of Forces Acting on a Solar Panel
595
Numerical Analyses
601
Two and ThreeDimensional Numerical Analysis for Flow Field Characteristics at Various Low Reynolds Numbers
603
Increasing the Critical Reynolds Number by Maximizing Energy Dissipation Problem
612
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