Abstract
When the surface temperature of a solid is below the solidification point of water, water vapor in air condenses on the solid surface to from the frost. This phenomenon is generally known as the frost formation, and is a transient phenomenon in which both heat transfer and mass transfer take place simultaneously. In engineering, the frost formation is a process associated with such consumer products as refrigerators and heat pumps. In this study, the effect of air temperature on heat transfer with frosting phenomena under the natural convection was investigated.