Small Bubbles Formation and Contribution to the Overall Gas Holdup in Large Diameter Columns of Very High Viscosity Oil
نویسندگان
چکیده
A limited number of studies are available in literature on the small bubbles which create from gas-very high viscosity oils interaction and its contribution to gas holdup system. The rate bubble formation has an important impact heat mass transfer many chemical industrial processes. work presented current paper provides unique information millimetre diameter oil. column 290 mm Silicon oil 330 Pa.s viscosity, were employed besides Electrical Capacitance Tomography a high-resolution camera investigate characteristics bubbles. Mechanism generation, effect injection time flowrate studied. average void fraction, total gas-liquid height, overall Probability Density Function (PDF) profile, volume fractions measured. Small generate eruption large bubbles, at nozzles, coalescence liquid bridges transition churn flow regime. Properties concentration controlled by location flowrate, time. contribute 6.6- 30% holdup. Bubble increased 0.68 0.75 decreased 1.1 top bottom sections respectively after 60 minof injection.
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ژورنال
عنوان ژورنال: International Journal of Multiphase Flow
سال: 2022
ISSN: ['1879-3533', '0301-9322']
DOI: https://doi.org/10.1016/j.ijmultiphaseflow.2022.104104