The polymethylmethacrylate (PMMA) microfluidic devices are fabricated by the maskless lithography, hot embossing lithography and direct bonding technique. The effects of liquid viscosity, surface wettability and surface area to volume ratio on the surface-driven capillary flow are studied in the PMMA microfluidic devices using ethylene glycol, isopropyl alcohol (IPA), liquid mixture (aqueous IPA) and ethanol as working liquids. The diffusion coefficient is determined in each surface-driven capillary flow by comparing the experimental results of meniscus propagation with the analytical solutions. These experimental studies will be useful to manipulate different working liquids inside the microfluidic lab-on-a-chip systems. Keywords: PMMA, Viscosity, wettability, surface to volume ratio, diffusion coefficientCite this Article Subhadeep Mukhopadhyay. Experimental Studies on the Effects of Liquid Viscosity and Surface Wettability in PMMA Microfluidic Devices. Recent Trends in Fluid Mechanics. 2017; 4(1): 16–21p.
