A Study on Heat Transfer from a Horizontal Heated Circular Cylinder in a Progressive Sound Field

Abstract

In this paper, firstly it is revealed that straight acoustic streaming generates in the progressive sound field in front of a loud-speaker, by visualizing the thermal field around a heated cylinder. Secondly the influence of the acoustic streaming on the heat transfer from a horizontal isothermal cylinder in a progressive sound field is investigated. The results show the heat transfer of the cylinder in a progressive sound field increases mainly at the speaker side, and the effect depends on the velocity of the streaming rather than on the sound pressure level. Consequently, it is clarified that we should note the straight acoustic streaming, which has been ignored in previous research works, on heat transfer augmentation in a sound field.