In-situ observation of convection in droplet under microwave radiation by PIV

In this study, microwave irradiation is applied to a liquid droplet and the surface tension, the circulation flow and temperature of water droplet are measured dynamically under the irradiation. The droplet was allowed to return to its original temperature after the irradiation, it was found that wa...

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Bibliographic Details
Main Authors: Asada, M., Kanazawa, Y., Asakum, Y., Honda, I., Phan, Chi, Parmar, Harisinh Bhikhubhai, Pareek, Vishnu, Evans, G.
Other Authors: Nobuhiro Aya
Format: Conference Paper
Published: S P I E - International Society for Optical Engineering 2014
Subjects:
Online Access:http://hdl.handle.net/20.500.11937/35458
Description
Summary:In this study, microwave irradiation is applied to a liquid droplet and the surface tension, the circulation flow and temperature of water droplet are measured dynamically under the irradiation. The droplet was allowed to return to its original temperature after the irradiation, it was found that water surface tension remained well below its original value for an extended period of time. Surface tension reduction shown similar effect of "impurity" at molecular level during the microwave, and some "memory" after microwave, which might be caused by nano-bubble. On the other hand, microwave can introduce the circulation flow of higher rotation speed and will be expected to be applied for non-contact stirring method.