Effect of vibration on natural convection heat transfer from vertical fin arrays

The effect of vibration on natural convection heat transfer from vertical rectangular fin arrays of different fin spacings and fin lengths was investigated experimentally. It was seen that up to a certain threshold value of the product of amplitude and frequency (15 mm/s), the imparting of vibration did not have any significant effect on heat transfer from the fin array: Beyond this value, however, the heat transfer rate increased considerably with the increase in the intensity of vibration, the maximum increase obtained being 250% when the vibrational energy input was 90 W.