The mechanical response of liquids depositing on a reed.

A composite reed flexural vibration method is used to investigate the dynamic mechanical responses of deposited liquids. The composite vibration system consists of a substrate reed with a hole and of liquids deposited inside the hole. The mechanical response of the composite system was monitored in the process of evaporation of deposited liquids such as deionized water, n-propanol and ethanol. The mechanical energy dissipation increases firstly and shows a sudden decrease nearly at the end of the evaporation process. The main contribution to the mechanical energy dissipation is identified to be the damping of liquid surface wave when liquids are inside the hole. This work provides a convenient way to investigate the damping of liquid surface wave by the composite reed vibration method.