Causal modeling / Herbert B. Asher

• Record Nr.: UNINA990003024880403321
• Pubbl/distr/stampa: Beverly Hills ; London : SAGE, 1976
• ISBN: 0-8039-0654-4
• Descrizione fisica: 80 p. : ill. ; 22 cm
• Collana: Quantitative applications in the social sciences ; 3
• Locazione: SES
• Collocazione: 10810 SAG
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia

Small scale modeling and simulation of incompressible turbulent multi-phase flow / / Stéphane Vincent, Jean-Luc Estivalèzes, and Ruben Scardovelli

• Record Nr.: UNINA9910616357503321
• Autore: Vincent Stéphane
• Pubbl/distr/stampa: Cham, Switzerland : , : Springer, , [2022]; ©2022
• ISBN: 3-031-09265-1
• Descrizione fisica: 1 online resource (314 pages)
• Collana: CISM International Centre for Mechanical Sciences ; ; v.607
• Disciplina: 620.1064
• Soggetti: Multiphase flow - Mathematical models; Turbulence - Mathematical models
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Nota di bibliografia: Includes bibliographical references.
• Nota di contenuto: Intro -- Acknowledgements -- Collaborators -- Technical Aspects -- Financial Support -- Contents -- 1 Introduction and Motivations -- 1.1 ; Governing Equations for DNS of Multiphase Flows -- 1.1.1 Mass Conservation -- 1.1.2 Momentum Conservation -- 1.1.3 Fluid Assumptions -- 1.2 Interface and Jump Conditions -- 1.2.1 Surface Tension -- 1.2.2 Viscosity -- 1.3 The Final Model -- 2 DNS of Resolved Scale Interfacial and Free Surface Flows with Fictitious Domains -- 2.1 One-Fluid Model -- 2.2 General Discretization and Solvers -- 2.2.1 Pressure-Velocity Coupling and Solvers -- 2.2.2 Jump Conditions -- 2.2.3 Boundary Conditions -- 2.2.4 Poisson Pressure Solver -- 2.3 Methods for Handling Interfaces -- 2.3.1 Interface Tracking Methods -- 2.3.2 Front-Capturing (Implicit Interface) -- 2.3.3 SPH Methods -- 2.4 Capillary Effects and Jump Conditions at Interface -- 2.4.1 Ghost Fluid -- 2.4.2 Continuum Surface Force -- 2.5 Validations of Interface Tracking and Fictitious Domains -- 2.5.1 Comparison of Interface Tracking Methods -- 2.5.2 Density and Viscosity Averages -- 2.5.3 Capillary Forces -- 3 Interface Tracking -- 3.1 VOF -- 3.1.1 Introduction to VOF Methods -- 3.1.2 Initialization of the Color Function C -- 3.1.3 A Library to Initialize the Volume Fraction Field -- 3.1.4 Algebraic Methods for the Advection of the Color Function -- 3.1.5 Simple Geometric Methods for the Advection of the Color Function -- 3.1.6 VOF-PLIC Methods: Interface Reconstruction -- 3.1.7 VOF-PLIC Methods: Interface Advection -- 3.2 Level Set -- 3.2.1 Level Set Definition -- 3.2.2 Numerical Method -- 3.2.3 Coupled Level-Set Volume of Fluid -- 3.2.4 Advection of the Level-Set Function and the Volume Fraction -- 3.3 Front Tracking -- 4 Adaptive Mesh Refinement -- 4.1 Introduction -- 4.2 AMR -- 4.3 Poisson Solver -- 4.4 Numerical Results.; 5 Numerical Treatment of Constraints with Fictitious Domains -- 5.1 Augmented Lagrangian Methods -- 5.2 Penalty Methods -- 5.3 Remarks on Time Splitting Approaches -- 5.4 Validation of Penalty Techniques -- 6 Compressible (Low-Mach) Two-Phase Flows -- 6.1 Mass Conservation -- 6.2 Momentum Conservation -- 6.3 Energy Conservation -- 6.4 Comparison with Classical ``Low Mach Number'' Model -- 6.5 Synthesis of Models -- 6.6 Validation of Isothermal Compressible One-Fluid Model -- 7 Large Eddy Simulation of Resolved Scale Interfacial Flows -- 7.1 Filtering 1-Fluid Navier-Stokes Equations-Continuous Media Framework -- 7.2 Filtering Discrete Mechanics Equations -- 7.3 Structural LES and Approximate Deconvolution Models (ADM) -- 7.4 LES of Multiphase Flows -- 8 DNS of Particulate Flows -- 8.1 Fictitious Domain and Penalty Approaches -- 8.1.1 Physical Characteristics of the Equivalent Fluid -- 8.1.2 Eulerian-Lagrangian VOF Method for Particle Tracking -- 8.1.3 Numerical Modeling of Particle Interaction -- 8.1.4 Parallel Implementation -- 8.1.5 Sum up of the Implemented Eulerian-Lagrangian Algorithm -- 8.2 Validations -- 8.2.1 Monodispersed Arrangements of Spheres -- 8.2.2 Bidisperse Arrangements of Spheres -- 8.2.3 Fluidized Beds -- 8.2.4 Interaction Between Particles and Turbulence -- 9 Multiscale Euler-Lagrange Coupling -- 9.1 Introduction -- 9.2 Governing Equations -- 9.3 Resolved Liquid Structures-Eulerian Modelling -- 9.3.1 Interface Tracking -- 9.3.2 Temporal Integration -- 9.3.3 Adaptive Mesh Refinement -- 9.4 Multi-scale Approach -- 9.4.1 Treatment of Medium Structures -- 9.4.2 Small Droplets -- 9.5 Results and Validation -- 9.5.1 Drop in a Uniform Flow -- 9.5.2 Drop-Free Surface Collision -- 9.5.3 Assisted Atomization of a Liquid Sheet -- 10 Applications and Perspectives -- Appendix Bibliography.