Surface cooling rate, K/s: radiation and convection to the air over the exposure fraction (0…1) of a particle's skin, and conduction to the ground over its contact fraction, spread over the thermal skin (ρ·c·skin per m²).
exposure
contact
Surface cooling rate, K/s: radiation and convection to the air over the
exposurefraction (0…1) of a particle's skin, and conduction to the ground over itscontactfraction, spread over the thermal skin (ρ·c·skin per m²).