Experimental investigation of bubble and drop formation at submerged orifices
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Nicolas Dietrich
,
Nadia Mayoufi
Abstract
The aim of this study was to investigate bubble/drop formation at a single submerged orifice in stagnant Newtonian fluids and to gain qualitative understanding of the formation mechanism. The effects of various governing parameters were studied. Formation behavior of bubbles and drops in Newtonian aqueous solutions were investigated experimentally under different operating conditions with various orifices. The results show that the volume of the detached dispersed phase (bubble or drop) increases with the viscosity of the continuous phase (or dispersion medium), surface tension, orifice diameter, and dispersed phase flow rate. A PIV system was employed to measure the velocity flow field quantitatively during the bubble/drop formation, giving interesting information useful for the elucidation of the fundamental formation process at the orifice. It was revealed that the orifice shape strongly influences the size of the bubble formed. Furthermore, based on a simple mass balance, a general correlation successfully predicting both bubble and drop sizes has been proposed.
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© 2012 Institute of Chemistry, Slovak Academy of Sciences
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Articles in the same Issue
- Content of selected secondary metabolites in wild hop
- Continuous sorption of synthetic dyes on dried biomass of microalga Chlorella pyrenoidosa
- Sludge of wastewater treatment plants as Co2+ ions sorbent
- Effect of animal age and gender on fatty acid and elemental composition in Austrian beef applicable for authentication purposes
- Nutritional, antioxidant, and glycaemic characteristics of new functional bread
- Effects of enzymes and hydrocolloids on physical, sensory, and shelf-life properties of wheat bread
- Magnetic chains formed from tetra-coordinate Co(II) complexes
- Prediction of anti-tuberculosis activity of 3-phenyl-2H-1,3-benzoxazine-2,4(3H)-dione derivatives
- Experimental investigation of bubble and drop formation at submerged orifices
- Cadmium concentration stabilization in a continuous sulfate reducing bioreactor via sulfide concentration control
- Facile synthesis of gemini surface-active ATRP initiator and its use in soap-free AGET ATRP mini-emulsion polymerisation
- Bulgarian natural diatomites: modification and characterization
- Synthesis, characterisation, and DC conductivity of polyaniline-lead oxide composites
