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.
Author(s): Henry França Meier, Amir Antônio Martins de Oliveira Junior, Jonathan Utzig
Series: Lecture Notes in Mechanical Engineering
Publisher: Springer-ABCM
Year: 2023
Language: English
Pages: 212
City: Rio de Janeiro
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
