Bubbling laws in a glass furnace
Résumé
Bubblers are commonly used in glass furnaces in order to enhance convective motions. Despite extensive studies, bubble formation from an orifice has not been described by a single law. Usually the formed bubble volume depends at least on two parameters: the viscosity and the gas flow rate in dimensionless form. By reconsidering available models, we have derived a single parameter law to describe bubble formation for different gas flow rates and fluids. Two regimes appear, namely the viscous and inertial regimes, depending on the value of this parameter.