Abstract
Among heat transfer augmentation techniques, passive cooling technique found more suitable for electronic cooling than active technique. In the last decades, intensive attentions were spent on miniaturizing the automobile and electronic devices because of high sophisticated micro-and nanotechnology development. But heat dissipation is still major problem of enhancing the thermal performance of engine heat sink. Effects of thermodynamic properties like heat input, base-toambient temperature difference are also studied by many researchers. The prime objective of the present review is to study the convective heat transfer in rectangular fins. Data collected from earlier and present work on this related topic. Higher heat transfer enhancement obtained with vertically oriented bases than with horizontally oriented bases for fin arrays of the same geometry. Various experimental studies have been made to investigate effect of fin height, fin spacing, fin length and fin thickness over convective heat transfer. Some investigators make known sets of correlations screening the relation between various parameters of engine heat sink-fins. Experiments are taken by some researchers for upward and downward facing rectangular fins. Also, trivial investigation has been carried out for different angle of inclination of engine heat sink-fins. The sensitivity of inclination over geometric parameters found to be great importance. The paper focus on various experimental studies has been made to investigate effect of fin height, fin spacing, fin length, fin thickness, fin inclination and fin orientation over convective heat transfer.