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Description of two-phase flow interface (1 credit hour):
Local equations at the fluid-fluid and fluid-solid interfaces, curvature, Young-Laplace
equation, contact angle.
Analytical solutions (3 credit hours):
Two-phase Poiseuille flow, Rayleigh-Taylor instability, bubbles stability.
Application to spray atomization (3 credit hours):
Orders of magnitude, stability of a droplet, Weber number, Eötvös number, spray
primary and secondary break-up.
Numerical approaches for two-phase interface treatment (3 credit hours):
Volume of fluid approach, level-set approach, diffuse interface approach.
Part II: Dilute two-phase flow
Tools for spray analysis (1 credit hour):
Lagrangian vs Eulerian, size probability density function, velocity probability density
function, Sauter mean diameter.
Droplet and particle transport equations (2 credit hours):
Drag forces, secondary forces, collisions and coalescence, evaporation, mass and
energy transfers.
Turbulence interaction with droplets or particles (3 credit hours):
Preferential concentration, energy transfer, turbulence modulation.
Application to combustion chambers (3 credit hours):
One droplet evaporation, one droplet combustion, spray combustion regimes, Chiu
diagram.
Numerical approaches for dilute two-phase flow (3 credit hours):
Lagrangian approach, particles vs parcels. Eulerian approach, size discretization,
sectional vs moments approaches.
Midterm exam (3 credit hours):
Evaluation of parts I and II. The exam will be graded and solutions will be provided.
Part III: Dense two-phase flow
Tools for dense-flows analysis (3 credit hours):
Dimensionless parameters, Favre average, quantity of surface, drag coefficient for
dense flow, models for contact collisions.
Models for dense two-phase flow (3 credit hours):
Theorems associated with volume averaging, derivation of volume-averaged
equations for two-phase flow, constitutive relations for the dispersed phase.
Application to two-phase heat exchanger (3 credit hours):
Order of magnitude, boiling regimes, Nukiyama curve.
Application to fluidized bed (3 credit hours):
Solid-liquid vs solid-gas fluidized beds, fluidization regimes, Geldart classification,
Richardson-Zaki relation.
Numerical approaches for dense two-phase flow (3 credit hours):
One-fluid vs two-fluid approaches, Eulerian-Lagrangian Spray Atomization (ELSA)
approach, closure equations.
Article presentation (3 credit hours +/- depending on the number of students):
Each student makes a 10-minute conference-like presentation. They will present the
results of a paper that will be distributed at the beginning of the semester. Papers will be
different for each student and be selected by the instructors. This session provides the