Lagrangian Particle Tracking Simulation in COMSOL Multiphysics®
Länge: 48:56
In this archived webinar, learn about simulating Lagrangian particle tracking (LPT) with the COMSOL Multiphysics® software. Get a demonstration of how to subject particles in a fluid to lift, drag, electromagnetic and thermophoretic forces, as well as turbulent flows.
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Kapitelauswahl
Introduction (0:00)
Essentials of Particle Tracing (2:05)
Define the Particle Species (4:14)
Equations of Motion (4:46)
Numerical Formulations (5:05)
Wide Variety of Boundary Conditions (5:32)
Multiphysics Couplings (5:59)
Drag Forces (6:39)
Drag Forces Live Demo (7:14)
By the Numbers (17:59)
By the Numbers (Part 1) (18:16)
Fluid Reynolds Number (18:39)
Laminar or Turbulent Flow? (19:03)
By the Numbers (Part 2) (19:51)
Relative Reynolds Number (20:01)
Typical Relative Reynolds Numbers (20:15)
The Drag Force (20:46)
Some Drag Correlations (21:10)
Cutoffs for Drag Correlations (21:38)
By the Numbers (Part 3) (22:36)
Effects of Time Step Size (23:08)
Example: Particle in Uniform Flow in 1D (23:39)
1D Benchmark: Speed and Distance (24:16)
1D Benchmark: Absolute Errors (25:04)
Time Stepping: General Comments (25:41)
Turbulent Dispersion (26:05)
Turbulent vs Molecular Diffusion (27:20)
Live Demo (35:30)
Discrete Eddy Interactions (28:25)
Discrete Random Walk Model (29:02)
Continuous Random Walk Model (29:15)
Solver Considerations (29:25)
Turbulent Dispersion in a Channel Model (29:53)
Turbulent Dispersion in a Channel Demo (31:10)
Results: Number Density vs Position (31:56)
More Built-in Forces (33:54)
Example: Acoustic Levitation (34:22)
Example: Dielectrophoretic Force (34:38)
Demo: Dielectrophoretic Separation (34:54)
Q&A (43:35)