In this study, concentration profiles and an indirect calculation of viscosity were investigated by using a new approach of near-infrared imaging with an optical measurement method to evaluate the mixing process of fluids with very different properties, such as water and glycerol, in a cell with a Y shape and by using the Lambert–Beer law for comprehensive absorbance analyses. The analysis of mixing efficiency in microchannels consists of determining crucial parameters, in this case, the local concentration and viscosities. Additionally, fluids in channels of micro-scale dimensions behave differently as compared to macroscopic geometries. It results in more efficiency for chemical reactions and mass and heat transfer. Due to this property, they gain most of their advantages over conventional-sized chemical process equipment. An extremely high surface-to-volume ratio characterizes microchannel-based devices because of their small linear dimensions. These devices can be reactors, heat exchangers, and static mixers, among other process components. These components vary in size, but all devices can be fabricated in configurations scaled in millimeters and embedded with micrometer-sized channels. By variating the fluid parameters, the influences of the highly different original viscosities in the mixing procedure were investigated and visualized.ĭuring the last few years, the application of micro-structured components for process engineering has gained increasing importance in chemical, pharmaceutical, and life sciences. The result of local concentration in mass fraction was used to determine the local viscosity and illustrated as distribution images. A linear behavior between the concentration and the absorption coefficient is demonstrated. The resulting measurement images were converted in a concentration profile by using absorbance calculated with Lambert–Beer law. Absorption differences of glycerol and water and their mixtures with a mass fraction of glycerol from 0 to 0.95 g G l y c g t o t a l − 1 were analyzed in the NIR spectral area. The proof-of-concept setup consists of a near-infrared (NIR) camera and cost-effective dome lighting with NIR light-emitting diodes (LED) covering the wavelength range of 1050 to 1650 nm. For very large or very small quantity, enter number in scientific notation, Accepted format are 3.142E12 or 3.142E-12 or 3.142x10**12 or 3.142x10^12 or 3.142*10**12 or 3.The work presents an efficient and non-invasive method to visualize the local concentration and viscosity distribution of two miscible and non-reacting substances with a significant viscosity difference in a microchannel with a Y-shape cell.For conversion to different Viscosity units, select required units from the dropdown list (combo), enter quantity and click convert.Both Glycerin at 20☌ and Glycerin at 40☌ are Viscosity measurement units. Simply enter Viscosity quantity and click ‘Convert’. Use current calculator (page) to convert Viscosity from Glycerin at 20☌ to Glycerin at 40☌. Glycerin at 20☌ and Glycerin at 40☌ are the units to measure Viscosity, whereġ Glycerin at 20☌ = 4.9647887 Glycerin at 40☌Įnter viscosity value and click 'Convert' Convert viscosity of Oil, Water, Glycerin and other thick fluids at different temperature from Glycerin at 20☌ to Glycerin at 40☌ or to Poise, Centipoise, Water at 20C, Water at 40C, Heavy Oil at 20C, Heavy Oil at 40C, Glycerin at 20C, Glycerin at 40C, SAE 5W at -18C, SAE 10W at -18C, SAE 20W at -18C, SAE 5W at 99C, SAE 10W at 99C, SAE 20W at 99C and more
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