This course explains mechanisms and analytical methods of multiscale thermal-fluid systems which are composed of macroscopic and microscopic phenomena as follows: (1) nucleation and growth of bubble relating to boiling and cavitation, (2) formation and growth of condensation nuclei in supersaturated vapor relating to formation of aerosol or cluster, (3) evaporation in three-phase contact line and very thin liquid film relating to boiling and evaporation on superheated wall, (4) modeling of two-phase flow which contains small dispersed phase such as bubbles or particles, (5) supercooling phenomenon, and (6) formation and growth of solidification nuclei in solid-liquid phase change. In addition fundamentals and applications of molecular dynamics method are explained as an analysis of molecular scale thermal-fluid phenomena.
Students will understand the coupling of macroscopic and microscopic phenomena in the above multiscale thermal-fluid systems as well as the practical applicability of molecular dynamics method with a basic knowledge on the method.
By the end of this course, students will be able to:
1) Estimate nucleation rate and growth rate of bubble or condensation nuclei based on nucleation theory and macroscopic thermal-fluid dynamics.
2) Conduct thermal-fluid analysis of thin film including microscale mechanisms such as disjoining pressure and interfacial evaporation resistance.
3) Derive governing equations of two-phase dispersed flow with bubbles or particles.
4) Estimate nucleation rate and growth rate of ice nuclei based on nucleation theory.
5) Understand fundamentals of Molecular Dynamics Method.
6) Obtain thermal properties and molecular behavior during phase change as applications of using Molecular Dynamics Method.
Multiscale, Thermal fluid, Phase change, Evaporation, Boiling, Condensation, Nucleation, Bubble, Droplet, Liquid film, Two-phase flow, Solidification, Supercooling, Molecular Dynamics Method, Thermal property
|Intercultural skills||Communication skills||Specialist skills||Critical thinking skills||Practical and/or problem-solving skills|
In some classes, students will be given exercise problems related to the lecture given that day to solve.
|Course schedule||Required learning|
|Class 1||Introduction (Overview of multiscale thermal-fluid phenomena)||Understand the overview of multiscale thermal-fluid phenomena.|
|Class 2||Nucleation and growth of bubble in superheated liquid, and formation and growth of condensation nuclei in supersaturated vapor||Understand nucleation theory.|
|Class 3||Evaporation in three-phase contact line and very thin liquid film||Understand microscale mechanisms such as disjoining pressure and interfacial evaporation resistance.|
|Class 4||Modeling of multiphase flow containing small dispersed phase||Understand the coupling of governing equations for continuous and dispersed phases.|
|Class 5||Nucleation and growth of ice in supercooled water||Understand the transferring phenomenon of thermal energy related to phase change between liquid and solid, macroscopically and microscopically.|
|Class 6||Basis of the molecular dynamics method (macro-phenomenon and micro-phenomenon)||Understand the basis of Molecular Dynamics Method.|
|Class 7||Calculation method of Molecular Dynamics Method and its algorithm||Understand further of Molecular Dynamics Method using examples.|
|Class 8||Applications of using Molecular Dynamics Method (Calculation of solid-liquid phase change and the thermo-physical properties)||Master what kind of results we can obtain using Molecular Dynamics Method.|
Handouts will be provided as needed.
Students' knowledge on topics in this lecture will be assessed by report (80%) and exercises (20%).
Students should have basic knowledge on thermodynamics, heat transfer, and fluid mechanics.