Abstarct: In present study, phenomena of falling a droplet into a channel filled with a fluid and in an axisymmetric domain is numerically investigated and important parameters such as: temperature difference between droplet and fluid, effect of dimensionless numbers such as: Reynolds number, Weber number, Froude number and Rayliegh number; were changed during solutions and result of them are given as figures, contours, tables and curves. With respect to two-phase flow in this study, in order to track of interface of two phases Volume of Fluid (VOF) method has used and this method's equation with other governing equations has solved with Fluent commercial code. Changes in affecting parameters of problem caused the falling phenomena to be in different regimes during falling and so that falling time, heat transfer rate, deformation from circular shape, separation and etc. in different cases was different. All of above items were compared with each other in different cases.