Advances in Turbulence: Selected Papers from the XII Spring School on Transition and Turbulence

Description

This book presents selected papers from the 12th edition of the Spring School of Transition and Turbulence which took place in 2020. The papers cover applications on a number of industrial processes, such as the automotive, aeronautics, chemicals, oil and gas, food, nanotechnology, and others. The readers find out research and applied works on the topics of aerodynamics, computational fluid dynamics, instrumentation and experiments, multi-phase flows, and theoretical and analytical modeling.  ABCM—Brazilian Society of Mechanical Sciences and Engineering Foreword Preface Contents Contributors Part I Computational Fluid Dynamics 1 Dynamic Flow Structures in the Wake of a Surface-Mounted Finite-Height Square Prism 1.1 Introduction 1.2 Computational Models and Methods 1.3 Results and Discussion 1.3.1 Mean Flow Field 1.3.2 Phase-Averaged Flow Field 1.4 Conclusions References 2 The Turbulence Damping Effect on the Slug Flow Modeling 2.1 Introduction 2.2 Mathematical Modeling 2.3 Methods 2.4 Results and Discussion 2.5 Conclusions References 3 Large-Eddy Simulation of Smooth Channel Flow with a Stochastic Wall Model 3.1 Introduction 3.2 Methods 3.2.1 One-Dimensional Stochastic Model 3.2.2 Large-Eddy Simulation Code 3.2.3 Simulation Setup 3.3 Results 3.4 Conclusion References 4 The Plunging of Hyperpycnal Plumes on Tilted Bed by Three-Dimensional Large-Eddy Simulations 4.1 Introduction 4.2 Methodology 4.3 Results 4.4 Conclusions References 5 Numerical Investigation of the Flow-Induced Noise in a Turbulent Flow Inside an HVAC Duct 5.1 Introduction 5.2 Methodology 5.2.1 Physical Modeling 5.2.2 Mathematical Modeling 5.2.3 Numerical Modeling 5.2.4 Post-processing Data 5.3 Results and Discussion 5.4 Conclusions References 6 Simex Implementation on a DNS Code 6.1 Introduction 6.2 Methodology 6.2.1 1D Burgers’ Equation 6.2.2 Manufactured Solutions 6.2.3 Compact Finite Differences 6.2.4 ESDIRK-IMEX 6.2.5 IMEX Decompositions 6.2.6 ESDIRK-Stepwise-IMEX 6.2.7 Iterative Methods for Implicit Equations 6.2.8 Butcher’s Tableau for the Used Runge–Kutta 6.3 Preliminary Results 6.3.1 Maximum Stable CFL 6.3.2 CPU Time 6.4 Conclusions 6.5 Next Steps References 7 Direct Numerical Simulation of Bi-Disperse Particle-Laden Gravity Currents on Lock-Exchange Configuration with Different Schmidt Number 7.1 Introduction 7.2 Methodology 7.2.1 Flow Configuration and Governing Equations 7.2.2 Software 7.2.3 Post-Processing 7.2.4 Global Parameters 7.3 Results 7.3.1 Evolution of Current Front Position and Velocity 7.3.2 Suspended Mass and Sedimentation Rate 7.3.3 Deposit Mean Profile and Composition 7.3.4 Energy Budget of the Flow 7.4 Conclusion References 8 Turbulent Kinetic Energy Analysis in 2D Lid-Driven Cavity Flow at Re = 100,000 8.1 Introduction 8.2 Methodology 8.2.1 The Lattice Boltzmann Method 8.2.2 Turbulent Kinetic Energy Budget 8.2.3 Production of Turbulence Term 8.3 Results 8.4 Conclusions References Part II Aerodynamics 9 Investigation of Transient Regime in Laminar Separation Bubble Formation 9.1 Introduction 9.2 Experimental Methodology 9.3 Results 9.3.1 Quasi-Steady Regime 9.3.2 Transient Regime 9.4 Conclusion References 10 Simulation of Laminar-To-Turbulent Transitional Flow Over Airfoils 10.1 Introduction 10.2 Methodology 10.3 Results 10.4 Conclusion References 11 Tollmien-Schlichting Waves Artificially Inserted in Boundary Layer by Harmonic Point Source 11.1 Introduction 11.2 Experimental Setup 11.3 Results 11.3.1 Preliminary Results 11.3.2 Tollmien-Schlichting Waves 11.4 Concluding Remarks References Part III Multi-Phase Flow 12 Investigation of Turbulent Gas-Solid Flow Multi-scale Dynamics in a Circulating Fluidized Bed Riser 12.1 Introduction 12.2 Mathematical Modeling 12.2.1 Statistic Analysis 12.2.2 Frequency Domain 12.2.3 Time and Frequency Domain 12.3 Methodology 12.4 Results and Discussion 12.4.1 Frequency Domain 12.4.2 Time and Frequency Domain 12.5 Conclusions References 13 Influence of Ultrasonic Waves and Airfoil-Shaped Ring Baffles on the Gas-Solid Dispersion in a CFB Riser 13.1 Introduction 13.2 Material and Methods 13.2.1 Experimental Setup 13.2.2 PDA Measurements 13.2.3 Solids Dispersion Coefficient 13.3 Results and Discussion 13.3.1 Solid Velocity 13.3.2 Solid Volume Fraction 13.3.3 Gas-Solid Dispersion 13.4 Conclusions References Part IV Instrumentation and Experiments 14 Estimation of the Energy Dissipation Rate in a Stirred Tank by 2D PIV Measurements 14.1 Introduction 14.1.1 Energy Dissipation Rate 14.2 Methodology 14.3 Results and Discussion 14.4 Conclusion References