Particle-Dynamics

Equivalent particle diameters for aerosol single-particle dynamics. Migrated from Aerosol.jl@c8c640bb src/single_particle_dynamics.jl:390 (`AerodynamicDiameter` @component). Computes the classical aerodynamic diameter D_ca (the diameter of a unit-density sphere with the same settling velocity) and its continuum-limit approximation (Seinfeld & Pandis 2006, Chapter 9, Eqs. 9.110 and 9.112).

Brownian (Stokes-Einstein) diffusion coefficient for aerosol single-particle dynamics. Migrated from Aerosol.jl@c8c640bb src/single_particle_dynamics.jl:172 (`BrownianDiffusion` @component). Computes the Brownian diffusivity D of a particle via the Stokes-Einstein relation with Cunningham slip correction (Seinfeld & Pandis 2006, Chapter 9, Eq. 9.73).

Electrical mobility and migration velocity for aerosol single-particle dynamics. Migrated from Aerosol.jl@c8c640bb src/single_particle_dynamics.jl:273 (`ElectricalMobility` @component). Computes the particle charge q, the electrical mobility B_e relating particle velocity to electric-field strength, and the electrical migration velocity v_e of a charged particle in an electric field (Seinfeld & Pandis 2006, Chapter 9, Eqs. 9.49, 9.50 and 9.51).

Mean free path of air molecules. Migrated from Aerosol.jl@c8c640bb src/single_particle_dynamics.jl:22 (`MeanFreePath` @component). Calculates the mean free path from dynamic viscosity, pressure, molecular weight, and temperature (Seinfeld & Pandis 2006, Chapter 9, Eq. 9.6).

Particle mechanical mobility for aerosol single-particle dynamics. Migrated from Aerosol.jl@c8c640bb src/single_particle_dynamics.jl:230 (`ParticleMobility` @component). Computes the particle mobility B, which relates an external force on a particle to the steady drift velocity it produces; via the Einstein relation D = B k T it also fixes the Brownian diffusivity (Seinfeld & Pandis 2006, Chapter 9, Eq. 9.78).

Terminal settling velocity and relaxation time for aerosol single-particle dynamics. Migrated from Aerosol.jl@c8c640bb src/single_particle_dynamics.jl:113 (`SettlingVelocity` @component). Computes the terminal settling velocity v_t and the relaxation time τ (time constant for velocity adjustment) for a spherical particle falling under gravity in a viscous fluid (Seinfeld & Pandis 2006, Chapter 9, Eqs. 9.38 and 9.42).

Comprehensive composed model combining all single-particle aerosol dynamics equations. Migrated from Aerosol.jl@c8c640bb src/single_particle_dynamics.jl:440 (`SingleParticleDynamics` @component). Composes MeanFreePath, SlipCorrection, and SettlingVelocity as coupled subsystems, then adds the Brownian diffusion and related properties inline. Covers Seinfeld & Pandis (2006), Chapter 9, Eqs. 9.6, 9.1, 9.34, 9.38, 9.42, 9.73, 9.78, 9.87, 9.88, 9.112.

Cunningham slip correction factor for noncontinuum aerosol effects. Migrated from Aerosol.jl@c8c640bb src/single_particle_dynamics.jl:64 (`SlipCorrection` @component). Calculates the slip correction factor C_c and Knudsen number Kn for particle-gas interactions.

Stokes number and stop distance for aerosol single-particle dynamics. Migrated from Aerosol.jl@c8c640bb src/single_particle_dynamics.jl:329 (`StokesNumber` @component). Computes the particle relaxation time τ, the stop distance s_p (the distance a particle travels before coming to rest), and the dimensionless Stokes number St characterizing particle inertia relative to a flow (Seinfeld & Pandis 2006, Chapter 9, Eqs. 9.38, 9.98 and 9.101).