Executive Summary : | The study aims to investigate the potential of phase change phenomena in a secondary fluid, a high volatile liquid, inducing turbulent mixing in a primary fluid, which dissipates heat under natural convection. Local turbulence in the primary heat dissipating fluid is created by upward moving vapor chunks produced by heating the high volatile fluid above its saturation temperature. This can lead to significant heat transfer enhancement in a passive mode under natural convection. The study proposes mapping important bubble dynamic parameters using infrared thermography and refractive index-based imaging techniques. Gradients-based imaging technique is employed to visualize bubble growth and calculate the relative contributions of different heat transfer mechanisms. Laser-based thin film interferometry is proposed to accurately predict microlayer thickness at different stages of bubble growth. The study aims to evaluate the interfacial and dynamical behavior of two immiscible liquid layers with higher density fluid undergoing phase change and condensation under natural convection. The study aims to develop a detailed understanding of the mechanisms through which high volatile liquid influences fundamental sub-processes and parameters. |