AVN/MRF APPROXIMATED PHYSICS
THE AVN/MRF USE A MODIFIED GRELL SCHEME
THIS USES THE CHANGE IN STABILITY TO DETERMINTE WHEN TO RELEASED ENERGY AS CONVECTION.
NO DIRECT MIXING BETWEEN THE CLOUDY AIR AND ENVIRONMENTAL AIR. (except at the cloud top and bottom)
NO CLOUD WATER EXSISTS, THEREFORE ALL WATER IS CONVERTED TO RAIN.