Prediction of shape of compound bubble
Dichloromethane (DCM) is denser and more volatile than water and is also immiscible. DCM is an organic compound found naturally in oceans, wetlands and volcanoes and its effect on the ecology and local currents. It is commonly used as a solvent in wood varnishes, paints, strippers, cements, vapor degreasing of metal parts. A small amount of DCM below a water pool when heated from below would start boiling and would release bubbles into much cooler water. As the bubbles rise, a portion of DCM condenses in the rising bubbles and leads to formation of interesting compound droplets. With sufficient condensation of DCM the compound bubble becomes heavier and settles down back to the heated surface. Consider one such compound bubble. The top part of the bubble interacts with the cooler water causing it to condense partially. The condensed part of the fluid being relatively heavier settle at the base of the droplet. This bubble, being heavy on the base will have an interesting shape. The goal of the project is to predict the shape of the compound bubble considering all the three phases. This is done by deriving equations for the curve based on force balance, considering all the forces acting on the bubble. These equations are simultaneously solved numerically to obtain the shape of the curve
Keywords: immiscible, compound bubble.