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Abstract
The hydrodynamic characteristics of mixing fluids are always the points to consider in improvement of their mixing quality especially using motionless mixers normally stated as “Static Mixers”. Motionless mixing technique was adopted for Air-Water system with the advantage of negligible power consumption over dynamic mixers. Different hydrodynamic characteristics were experimented using “Baffle Type” static element and were compared to those of already used in recent studies. Dissolved oxygen content, Static mixer geometry (i.e. Baffle, Blade, Wheel, Plate and Needle), mixing fluids flow rates were chosen as variables and selected in this content as rate of mass transfer study which founds out to be significant using “Baffle Type” static element. Volumetric mass transfer was also achieved at higher scale which gives a clear indication of increase the mass transfer coefficient in between the comparison of “Baffle type” element and other mentioned elements. Pressure droplet and depletion in Air bubble size across static elements were visually perceived using Hg-Manometer and still photography respectively. A mathematical model was also developed portraying the Air bubble diameter at different flow rates for this system. Other hydrodynamics like higher Dissolved Oxygen (DO) Content, Less Power consumption were also found to be more advantageous for “Baffle Type” static element.
Highlights
Mixing hydrodynamics always comes along with the “Power consumption” as a control parameter which normally influencing the “Efficiency of the System”
One of the most influencing parameters considered for hydrodynamics is Reduction in pressure of mixing fluid across the static elements
Comparison of Different Hydrodynamic Characteristics of Air- Water System using Dissimilar Motionless Mixers geometry, the other factors for higher Dissolved Oxygen (DO) content is because of more area available for air bubble to disperse into the water as the element contains 5 holes spaced from each other
Summary
Mixing hydrodynamics always comes along with the “Power consumption” as a control parameter which normally influencing the “Efficiency of the System”. Motionless mixers normally stated as “Static Mixers” are counted under those systems which utilize the kinetic energy of mixing fluids. These mixers once used in replacement of power mixers becomes more economical in the process industries of blending, dispersion and many others which does not require any complex designing too. Mouli M.C [8] in 2010 investigated the Gas particle dispersion and the effect of Gas particle velocity on it Overall, he presented the tabular form data in which different hydrodynamics characteristics for Air-Water system was tabulated using SMX Static Mixer. Diptendu D [12] in 2015 investigates the mass transfer and pressure drop with gas used as a mixing fluid for continuous phase and determines other hydrodynamic characteristics using static mixing methodology
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