Abstract
In this study, we conducted numerical analysis in the diffuser/nozzle based valveless micropump to understand an effect of the asymmetric characteristics of pressure loss in the micropump channel on pump characteristics. We had been investigated relationships that generations of vortices in the diffuser channel is related to the pump characteristics by using visualization of the flow and PIV analysis. However, the relation between the pressure loss of the asymmetric flow channel and the pump characteristics is not investigated. Therefore, we calculate the pump performance of the valveless micro pump using numerical analysis and investigate the relationship between the driving frequency, the flow velocity amplitude, and the pressure loss due to the unsteady flow, which affect the pump performance.
