《fluent12-lecture09-physics_printing》.pptx

Chapter 9Advanced Physics;Outline;Introductory FLUENT Training;Introduction;Multiphase Flow Regimes;Multiphase Models Available in FLUENT;DPM Example – Spray Drier;Eulerian Model Example – 3D Bubble Column;The Granular Option in the Eulerian Model;Mixture Model Example – Gas Sparging;VOF Example – Automobile Fuel Tank Sloshing;Reacting Flow Modeling;Temperature in a Gas Furnace;Background;*Rate classification not truly applicable since species mass fraction is not determined.;Pollutant Formation Models;Discrete Phase Model (DPM);Surface Reactions;Summary;Moving / Deforming Mesh;Introduction;CFD Modeling Approaches For Moving Zones ;Single Reference Frame (SRF) Modeling;Multiple Reference Frame (MRF) Modeling;The Mixing Plane Model (MPM);The Sliding Mesh Model (SMM);How the Sliding Mesh Model Works;;Dynamic Mesh Methods;;Summary;Multiphase Flow Modeling;Volume and Particulate Loading;Turbulence Modeling in Multiphase Flows;Phases as Mixtures of Species;Discrete Phase Model (DPM) Overview;Discrete Phase Model (DPM) Setup;DPM Boundary Conditions;The Eulerian Multiphase Model;Eulerian Multiphase Model Equations;Eulerian Multiphase Model Equations;Eulerian Model Setup;Mixture Model Overview;Mixture Model Equations;Mixture Model Setup;;Cavitation Submodel;Eulerian-Granular Model Setup;The Volume of Fluid (VOF) Model Overview;VOF Model Setup;UDFs for Multiphase Applications;;Reacting Flow Modeling;Eddy Dissipation Model (EDM);Non-Premixed Model;Premixed Combustion Model;Partially Premixed Combustion Model;Detailed Chemistry Models;Moving and Deforming Mesh;Absolute and Relative Velocities – The Velocity Triangle;Geometry Constraints for SRF;SRF Set-up: Cell Zones;SRF Set-up: Boundary Conditions;Interfaces;The MRF Model;Geometric Constraints for MRF ;Equations of fluid dynamics can be transformed to a moving reference frame with a choice of the velocities which are solved. Relative Velocity Formulation (RVF) Uses the relative velocity and relative total internal energy