Anugerah Erlaut, Soen Steven, Pandit Hernowo, Ibnu Maulana Hidayatullah, Neng Tresna Umi Culsum, Intan Clarissa Sophiana, Tulus Sukreni, Mubiar Purwasasmita
The phenomena of bubble formation from the venturi pipe microbubble generator were investigated. The air hole sizes were varied at 1, 0.5, and 0.3 mm while the volumetric flow rates were set at 4, 5, 6, 7, and 8 LPM. Insertion of a guitar string with a diameter of 0.2 mm into the 0.5 mm air hole size was also performed to examine its effect. The simulation of the bubble shrinkage process in water (sizes of 25, 50, 75, and 100 μm) was held with and without saturated nitrogen at 0.25, 0.5, 0.75, 0.875, and 1 atm. The experiment shows that average bubble sizes for air hole sizes of 1, 0.5, and 0.3 mm are 1.37, 1.40, and 1.09 mm, respectively. The flow rate alteration significantly affects the bubble sizes for air hole sizes of 0.5 and 0.3 mm but is not meaningful for 1 mm. In addition, the guitar string insertion also produces spherical bubbles with a size of 1.33 mm for deep depth location. Moreover, simulation results prove that smaller bubble sizes lead to prolonged shrinkage time and a greater mass transfer coefficient in the liquid phase with and without saturated nitrogen. © 2025 Canadian Society for Chemical Engineering.
Department of Chemical Engineering, Institut Teknologi Bandung, Bandung, Indonesia; Research Center For Sustainable Production System and Life Cycle Assessment, National Research and Innovation Agency (BRIN), South Tangerang, Indonesia; Department of Chemical Engineering, Universitas Bhayangkara Jakarta Raya, Kampus II, South Jakarta, Indonesia; Research Center of Biomass Valorization, Faculty of Engineering, Universitas Indonesia, Depok, Indonesia; Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Negeri Jakarta, East Jakarta, Indonesia; Department of Chemical Engineering, Faculty of Engineering, Universitas Indonesia, Depok, Indonesia
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