Brief Syllabus:

Introduction:

• Phase-change Thermo-physics, Equations of state, Phase diagrams, Phasestability and spinoidals, Interfacial tension, Free energy, Wetting and hysteresis.

Boiling and Condensation:

• Homogeneous and heterogeneous nucleation, Pool and convective boiling, Critical Heat Flux, Film/dropwise condensation, Enhancement techniques.

Two-phase flow:

• Flow patterns, Homogeneous and Separated flow model development.

Phase-change Technology (suggested topics):

• Active and Passive systems, Design of conventional heat pipes, Micro heat pipes, Pulsating heat pipes, Capillary pumped loops/ Loop heat pipes, Gravity assisted thermosyphons/ Vapor chambers, Electronics thermal management, Space thermal management; Two-phase heat exchangers, Boilers/Evaporators and condensers for Nuclear/Power/RAC industry.

• Special topics (suggested topics):

• Dynamic behavior of interfaces, Static and dynamic instabilities, Leidenfrost phenomena, Evaporation at interfaces, Marangoni effect, atomistic nucleation models, Accommodation coefficients, Molecular dynamics, phasechange under micro-gravity, Debris-bed cooling.

Experimental techniques:

• Void fraction, Velocity and thermal field visualization, Surface tension, thermometry, Data analysis, application examples.

Lecturewise Breakup

I. Introduction: (2 Hours)

• Introduction to phase change flow and heat transfer technology, Various industrial applications, Revision of Basic thermodynamics and heat transfer.

II. INTERFACIAL PHENOMENA & PHASE TRANSITIONS: (6 Hours)

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

III. BOILING AND CONDENSATION HEAT TRANSFER: (10 Hours)

• Boiling Fundamentals, Homogeneous and heterogeneous nucleation, Pool Boiling and Convective Flow Boiling, Heat Transfer and CFH mechanisms, Enhancement techniques External and Internal condensation, Film condensation theory, Dropwise Condensation theory, Enhancement techniques.

IV. TWO PHASE FLOWS: (6 Hours)

• Introduction to two-phase flows, Flow Patterns, Flow pattern Maps, Development of Homogeneous, Separated Flow and Drift Flux Models, Two-phase flow instabilities. [1 Lecture]

V. MEASUREMENT TECHNIQUES IN BOILING AND CONDENSATION: (2 Hours)

• Void Fraction measurement techniques, Visualization techniques, Contact angle/Surface tension measurement, Conventional thermometry, Data reduction, Applications .

VI. APPLICATIONS OF PHASE CHANGE TECHNOLOGY: (8 Hours)

• Boilers/Evaporators and Condensers for Nuclear/Power/RAC industry

• Electronics thermal management

• Gravity assisted thermosyphons/Vapor chambers.

• Conventional heat pipes

• Micro heat pipes

• Capillary pumped loops/ Loop heat pipes

• Micro two-phase heat exchangers

VII. SPECIAL TOPICS/ Term Paper presentation: (4 Hours)

• For example: Marangoni effect, microscale phenomena, atomistic models for nucleation, physically/chemically textured surfaces, fabrication/integration techniques, contact resistance, instabilities, surface roughness characteristics, boiling on porous media, Reactor debris cooling, Transport effects, dynamic behavior of interfaces and etc.

References:

1. Liquid Vapor Phase Change Phenomena , by Van P. Carey (Taylor & Francis)

2. Heat Pipe Science and Technology, Amir Faghri (Taylor and Francis)

3. One Dimensional Two-Phase Flow , G. B. Wallis (McGraw Hill)

4. Heat Transfer Characteristics in Boiling and Condensation, Karl Stephan (Springer)

5. Convective Boiling And Condensation , Collier John (Oxford Engineering Science)

6. Two-phase Flow and Heat Transfer, P. B. Whalley (Oxford Engineering Science)

7. Heat Pipe Technology and Applications, J. P. Peterson (John Wiley & Sons)

8. Heat Transfer – A practical approach, Yunus Cengel (Tata McGraw Hill)

9. Heat Transfer – Incropera and Dewitt, John Wiley and Sons