The strong upward flow called as “acoustic streaming”, when ultrasonic waves were applied in a medium, occurred near to ultrasonic transducer and enhanced the heat transfer. That is, applying ultrasonic waves in a medium may cause the flow velocity of the medium to increase: an effect known as acoustic streaming promotes heat transfer through convection and affects the thermal boundary layer. So, this study was compared with the pressure variations and enhancement of heat transfer by computational simulations and experiments in acoustic field. For the computational simulations, structural vibration simulator (SVS) programmed with a fortran language and based on a coupled finite element-boundary element method (coupled FE-BEM) was used. The results of this study reveal that the acoustic pressure is higher near two ultrasonic transducers than other points where no ultrasonic transducer was installed. The enhancement trend of heat transfer is similar with the profile of the pressure variations. It is concluded that the pressure variations are related to the enhancement of heat transfer in acoustic field.

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