General Information

Course Objectives

  • To provide a fundamentals of aerosol transport deposition and removal in laminar flows.
  • To provide a fundamentals of particles adhesion and removal from surfaces.
  • To familiarize the students with the computational modeling of particle resuspension in laminar flows.
  • To familiarize the students with the industrial applications of aerosols.
  • Course Learning Outcomes

Outcome 1:

  • Students will be able to formulate and solve aerosol tranport and deposition in laminar flows.

Outcome 2:

  • Students will be able to analyze adhesion and removal of micro- and nano- particles.

Outcome 3:

  • Students will become familiar with computational fluid mechanics and particle trajectory analysis procedures.
  • Students will demonstrate using the FLUENT Code for solving aerosol transport in laminar flows.
  • Student will become familiar with the experimental procedure for particle adhesion and removal analysis.

Outcome 4:

  • Students will become familiar with the microcontamination problems in microelectronic and imaging industries.
  • Students will become familiar with surface cleaning including ultrsonic cleaning.

Course Outline

Engineering Mathematics

  • Special Functions
  • Differential Equations
  • Fourier Series
  • Laplace Transforms
  • Probability and Random Processes
  • Linear Systems
  • Useful Integrals
  • Vector Identities

Viscous Flows

  • Navier-Stokes Equation, Vorticity, Stream Function
  • Cylindrical Coordinates
  • Exact Solutions
  • Drag on Spherical Particles
  • Creeping Flows
  • Nonspherical Particles

Review of Computational Fluid Mechanics

  • Introduction to Fluent and Gambit

Aerosols

  • Introduction to Aerosols
  • Stokes Drag, Lift Forces
  • Aerosol Kinetics
  • Virtual Mass, Basset Forces, and the BBO Equation
  • Nonspherical Particles
  • Brownian Motions
  • Diffusion and Interception
  • Particle Deposition Mechanisms
  • Aerosol Coagulation

Particle Adhesion

  • van der Waals Force
  • JKR and Other Adhesion Models
  • Particle Adhesion and Removal
  • Effects of Charge and Humidity
  • Utrasonic and Megasonic Cleaning

Simulation Methods

  • Laminar Flow Simulation
  • Particle Transport and Deposition in Laminar Flow

Experimental Techniques

  • Particle Adhesion and Resuspension
  • Aerosol Sampling Techniques
  • Clean Room Operation
  • Advanced Surface Cleaning Techniques

Applications

  • Microcontamination Control
  • Xerography
  • Clean Room and Process Equipment
  • Filtration Processes and Gas Cleaning

Evaluation Methods

  • Exam 1: 25%
  • Final Exam: 30% (Final Exam week)
  • Computational Projects 30%
  • Laboratory work 5%
  • Homework 10%

Course Description

ME 437 Fluid Mechanics of Aerosol Dispersion R-3, C-3.

Prerequisites: ME 326 or equivalent.

Review of viscous flow theory. Creeping flows around a sphere. Drag and lift forces acting on particles. Wall effects and nonspherical particles. Diffusion of aerosols in laminar flows. Brownian motion and Langevin equation. Mass diffusion in pipe and boundary layer flows. Dispersion of particles in turbulent flows. Turbulent diffusion and wall deposition of aerosols. Effects of electrostatics, van der Waals and other surface forces. Computational aspects of aerosol dispersion in laminar and turbulent flows. Particle removal and resuspension from surfaces. Coagulation of aerosols due to Brownian movement, presence of a shear field and turbulence. Applications to microcontamination control, air pollution, and particle deposition in human lung.

Exam and Homework Policies

Exam Policy

Exams will be open handout. The students are permitted to bring their handout notes to the exams. Other notes and homework solutions are not allowed.

Homework Policy

Homeworks will be collected on every Monday. The homework will be graded and returned to the students.

References

  • W.C. Hinds, Aerosol Science and Technology, Wiley (1983, 1999).
  • J. Happel and H. Brenner, Low Reynolds Number Hydrodynamics, Martinus Nijhoff (1983).
  • N.A. Fuchs, The Mechanics of Aerosols, Dover (1989).
  • V.G. Levich, Physicochemicals Hydrodynamics, Prentice-Hall (1962).
  • F. White, Viscous Flow, McGraw Hill (1974).
  • R.L. Panton, Incompressible Flow, John Wiley (1984).
  • H. Schlichting, Boundary Layer Theory, McGraw Hill (1979).
  • J.O. Hinze, Turbulence, McGraw Hill (1975).
  • H. Tennekes and J.L. Lumley, A First Course in Turbulence, MIT Press (1981).
  • G.M. Hidy, Aerosols, Academic Press (1984).
  • G.M. Hidy and J.R. Brook, The Dynamics of Aerocolloididal Systems, Pergamon Press (1970).
  • Papavergos and Hedley, Chem. Eng. Rs. Des., Vol. 62, September 1984, pp. 275-295.
  • S.K. Friedlander, Smoke, Dust and Haze, Wiley (1977).
  • J. H. Vincent, Aerosol Science for Industrial Hygienists, Pergamon Press (1995).