NUMERICAL-METHOD FOR CALCULATION OF SLOTTED-FIN EFFICIENCY IN DRY CONDITIONS

A numerical method for determination of slotted-fin efficiency is pres ented. The control volume based finite difference method was applied t o obtain the temperature distribution of the slotted fin. The effects of the slots on the temperature distribution over the fin surface were taken into account by application of the additional source term metho d. Computations were conducted for four configurations of the slotted fins. It is found that under the same conditions, the efficiency of th e slotted fin is always lower (typically by 5-15%) than stat of the no nslotted fin. Efficiency curves of the four slotted fins are presented , and the factors that affect slotted-fill efficiency are discussed.