Course

Module-1

Introduction to phase change flow and heat transfer technology, Various industrial applications, Review of one-dimensional conservation equations in single phase flows, Types of flow, volumetric concentration, void fraction, volumetric flux, relative velocity, drift velocity, flow regimes, flow pattern maps, analytical models.

Interfacial tension, wetting phenomenon and contact angles, Phase stability and nucleation.

Homogeneous Flow : One dimensional steady homogeneous equilibrium flow, homogeneous friction factor, turbulent flow friction factor.

Module-2

Separated Flow: Slip, Lockhart-Martinelli method for pressure drop calculation, pressure drop for flow with boiling, flow with phase change.

Drift Flow Model: General theory, gravity flows with no wall shear, correction to simple theory, Armondor Bank off flow parameters.

Boiling: Thermodynamics of boiling, Regimes of boiling, nucleation and dynamics of bubbles, gas nucleation in bulk liquid, growth of bubbles, motion at a heating surface, heat transfer rates in pool boiling, critical heat flux in pool boiling, forced convection boiling, critical heat flux in forced convection boiling, minimum heat flux, film boiling, post dry out heat transfer, heat transfer correlations, boiling of metals. Flow in stabilities, choking in two-phase flow.

Module-3

Condensation : Nusselt theory, Film and drop-wise condensation, boundary layer treatment of laminar film condensation, condensation in vertical and horizontal tubes, condensation inside a horizontal tube.

Signal Analysis, Two Fluid-Population Balance Technique, Volume of Fluid Method, Lattice-Boltzmann Model, Smoothed Particle Hydrodynamics.

Molecular Dynamics : Boiling, Condensation, Solid-Liquid Flow, Gas-Solid-Flow.

• CO1 : Describe the most important phenomena and principles of two-phase flow in engineering applications
• CO2 : Apply the basic two-phase models and flow pattern maps to calculate the pressure drops of two-phase flow at various conditions.
• CO3 : Explain the main points of boiling and condensation, heat transfer, and their enhancement methods
• CO4 : Describe the concept boiling crisis (e.g.,DNB- departure from nucleate boiling, and dry out) and its modelling
• CO5 : Apply the models of critical flow and flooding to analyze limiting flow of engineering processes.
• CO6 : Understand the current status to write a scientific review for a topic in the field of two-phase flow and heat transfer and identify problem for research

• Ishii,M. and Hibiki,T., Thermo-fluid Dynamics of Two-Phase Flow,Springer.2009.
• Collier, J. G. and Thome, J.R., Convective Boilingand Condensation, Oxford University Press,1996
• Brennen, C. E., Fundamentals of Multiphase Flow, Cambridge University Press.2009.
• Tong, L. S. and Tang,Y.S., Boiling Heat Transfer and Two-phase Flow, 2^nd,CRC Press.1997.
• Ghiaasiaan,S.M., Two-Phase flow, Boiling, and Condensation”, 2^nd edition,2017, Cambridge University Press
• Graham B Wallis, One dimensional two phase flow, Mc Graw Hill,1969.