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박정은(Jeongeun Park),강효찬(Hyochan Kang),강예슬(Yeseul Kang),차범석(Beomseok Cha),박진수(Jinsoo Park) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.11
Acoustomicrofluidic chips are being applied in various fields, including drug screening, because of their ability to control microscale heat transfer and manipulate floating objects. Acoustomicrofluidic chips can be used as disposable by attaching a PDMS film underneath the channel instead of permanently attaching an electrode and a channel. This approach is considered cost-effective and helps prevent contamination of channels. However, the conversion of acoustic energy into thermal energy occurs as a result of absorption caused by the viscoelasticity of PDMS. This phenomenon leads to changes in the properties of the fluid or particles. Therefore, a quantitative analysis of the absorption of acoustic waves by PDMS is necessary. This study investigates the relationship between the absorption characteristics and the thickness of the PDMS membrane through thermal measurement experiments using an infrared camera. This is validated by the results of flow mixing using acoustic streaming flow.