Sp_ch10

Temperature-dependent deliquescence relative humidity (DRH) of a crystalline inorganic salt — Seinfeld & Pandis (2006), Atmospheric Chemistry and Physics, 2nd ed., Chapter 10, Equation 10.72. DRH is the relative humidity at which a crystalline salt spontaneously absorbs water and forms a saturated aqueous solution; it shifts away from its 298 K reference value with temperature according to the salt's enthalpy of solution and its solubility-vs-temperature polynomial. Migrated from Aerosol.jl DRHTemperature at the upstream default parameterization salt = :NH4NO3.

Kelvin effect on the equilibrium vapor pressure over a curved droplet surface — Seinfeld & Pandis (2006), Atmospheric Chemistry and Physics, 2nd ed., Chapter 10. Computes the Kelvin saturation ratio S = p_A/p°_A (Eq. 10.86), the factor by which surface curvature enhances the equilibrium vapor pressure of a small droplet relative to a flat surface: S = exp(2 σ M / (R T ρ_l R_p)). The enhancement is significant for nanometre-scale droplets and decays toward unity as the droplet radius grows. Migrated from Aerosol.jl KelvinEffect.

ModelingToolkit implementation of ammonium nitrate (NH4NO3) gas-aerosol equilibrium from Seinfeld & Pandis (2006), Atmospheric Chemistry and Physics, 2nd ed., Chapter 10, Section 10.4.3. NH4NO3 is a semi-volatile aerosol species whose gas-particle partitioning depends strongly on temperature and relative humidity. The component evaluates three temperature- and humidity-dependent quantities: the natural log of the solid-phase dissociation constant ln(Kp) for NH3(g) + HNO3(g) <-> NH4NO3(s) (Eq. 10.91), the deliquescence relative humidity DRH of NH4NO3 (Eq. 10.88), and a phase indicator that is 1 when the ambient RH exceeds the DRH (aqueous aerosol) and 0 otherwise (solid aerosol). Migrated from Aerosol.jl NH4NO3Equilibrium. Purely algebraic: no differential states, three observed outputs and an empty equations array.

ZSR (Zdanovskii-Stokes-Robinson) mixing rule for aerosol liquid water content — Seinfeld & Pandis (2006), Atmospheric Chemistry and Physics, 2nd ed., Chapter 10. Computes the total aerosol liquid water content W of a multicomponent inorganic-salt solution as the sum over species of the water each salt holds in its own binary solution at the ambient water activity (Eq. 10.98), with the water activity set equal to the relative humidity for an equilibrium aerosol (Eq. 10.63). Migrated from Aerosol.jl ZSRWaterContent at the upstream default parameterization n_species = 3.