An experimental study with MPIV flow visualization of incompressible liquid flow in a microchannel is presented. DI water served as a working medium. The channel was microfabricated in a PMMA substrate using an excimer laser and was 115 μm deep, 200 μm wide and 24000 μm long with a hydraulic diameter of about 146 μm (Fig.2)

Fig.1

Fig.2