Topics in Aerosol Physics (ATSC5880) Spring 2008, Terry Deshler

Text: Aerosol Technology Properties, Behavior and Measurement of Airborne Particles, 2nd Ed., W. C. Hinds (1999)

 

Other sources which may be useful/used (location)

Baron, P. A., and K. Willeke, (2001) Aerosol Measurement Principles, Techniques, and Applications, 2nd Edition. (Keck Laboratory)
Friedlander, S. K. (2000) Smoke, Dust, and Haze. 2nd Edition  (Library copy in my office)
Fuchs, N. A. (1964) The Mechanics of Aerosols. Pergamon Press, Oxford. (Gabor's office)
Gotz, G., E. Meszaros, and G. Vali (1991) Atmospheric Particles and Nuclei, Akademiai Kiado. Budapest. (Gabor's office)
Seinfeld, J. H. and S. N. Pandis (1998) Atmospheric Chemistry and Physics. John Wiley and Sons, New York. (Derek's)
Willeke, K., and P. A. Baron (1993) Aerosol Measurement Principles, Techniques, and Applications. Van Nostrand Reinhold, New York. (Library)
Twomey, S. (1977) Atmospheric Aerosols. Elsevier, Amsterdam. (Gabor's)
Penner et al., Quantifying and Minimizing uncertainty of climate forcing by anthropogenic aerosols, BAMS, 75, 375-400, 1994.
IPCC - reports 1996, 2000, 2006 (Derek's office)

Grading: Two exams (40%), Homework (20%), Labs (20%), Presentation/Research Project (20%)

Schedule, 30 - 75 min lectures, including 5 labs.   IDL_procedures_td

Materials for Lab ATSC5880 - 1) VOAG particle generation, impaction, microscopy. 2) Aerodyamic particle sizer.

3) Electrostatic classifification and particle diffusion.  4) Counting efficiency of condensation nuclei counters. 5) Heterogeneous nucleation of water from gas phase, cloud condensation nuclei counters.

 

Wk Lect  Topics (Begin Jan. 14, 2008 – May change somewhat through the semester. Exercises for class discussion

1     1    Definitions    [Hinds, Ch. 1],    Aerosol sizes, shapes, composition [Hinds, Ch. 1].  History [Baron and Willeke, Ch. 1]

       2     Kinetic theory of gases [Hinds, Ch. 2[, Molecular motion, Ideal gas law, Mean free path, Viscosity - transfer of momentum

2     3   Diffusion - Transfer of mass, Reynold number (Re).   Uniform particle motion [Hinds, Ch. 3], Newton's resistance law (High Re, Stoke's law (low Re)   HW#1 due 1 February

       4   Settling velocity, Mobility small particles, Slip correction, Nonsherical particles, Aerodynamic diameter, Settling (high Re), Iterative solution to Newton's resistance law

3     5    Partice size distributions [Hinds, Ch. 4, Seinfeld and Pandis, Ch. 7?], Different representations for binned data, e.g. dn/dd, dn/dlogd, dn/dlog10d  HW#2 due 18 February   Size distribution  Solution graphs

       6    Lognormal size distributions, utility, presentation, moments of the distribution.

4     7    Relaxation time, Straight line acceleration, Stopping distance, Curvilinear motion.

       8   Inertial impaction, Cascade Impactor, Virtual impactor, Aerodynamic particle sizer.

5     9  Adhesive forces - London van der Waals, Surface tension, Electrostatic forces [Hinds, Ch 6]

      10  Aerosol diffusion [Hinds, Ch. 7], Brownian motion, Stokes Einstein derivation of diffusion coefficient, Fick's first law of diffusion. Dependence of diffusion coefficient on particles size, Particle mean free path, Brownian displacement.

6   11   Fick's second law of diffusion, Particle loss by diffusion, Diffusion batteries. InletEff  HW#3 due 5 March

     12  Thermal and radiometric forces [Ch 8, Hinds],    Electrical mobility, Charge equilibrium, Electrostatic precipitators, Electrostatic classification [Ch 15, Hinds].

 7      13  - Lab #1) VOAG particle generation, impaction, microscopy. (Wiesje & Jennifer, 27 Feb)

        14  Sampling and Measurement of Concentration [Ch 10, Hinds]: isokinetic sampling, measurement of mass/number   concentration, sampling efficiency (Wiesje - 29 February)         

  8     15  Charge equilibrium, Electrostatic precipitators, Electrostatic classification [Ch 15, Hinds].

         16 ------------------------------            Review, Boltzmann Equilibrium Charge Distribution, E - 7 March

           9      17 -------------------------      Exam 10 March

         18  Coagulation [Ch 12, Hinds]. Polydisperse coagulation ExFig, O'Dowd&, Condensation/Evaporation [Ch 13, Hinds], Kelvin equation derived

       19  - Lab #2) Aerodyamic particle sizer. (Leslie & Dong Liu, 12 March)

                   20   Nucleated condensation - Köhler curves [Mason, pp24 ff], Evaporation HW#4 due 4 April

 9                ------------------------------------  spring break 17-21 March
10   21     Tropospheric aerosol - marine/continental, urban/rural, sources/sinks.  (Binod -24 March)

           Stratospheric aerosol - mid latitudes, polar regions. (Mahesh - 24 March)
      22    Optics: Scattering (Rayleigh, Mie, large particles), Absorption, extinction, wavelength dependence, optical measurement of aerosol [Ch 16, Hinds, van de Hulst, Goody and Young]          

      23 - Lab #3) Electrostatic classification and particle diffusion. (Loknath & Ming Zhao, 26 March)

11  ------------------- no class 31 March - 4 April

12  24   Aerosol climate implications, direct/indirect effects (Loknath - 9 April) Issues of aerosol impacts on global climate models (Rahn - 9, 11 April).

      25 - Lab #4) Counting efficiency of condensation nuclei counters. (Binod & Dave, 10 April)
      26   Interactions with clouds - Cloud condensation nuclei (CCN),  Ice nucleation (Damao, 11, 25 April)

         13  --------------- ---------------- No Class 14-18 April - EGU, 20-23 April

         14   27   Ice Nucleation (Damao, 25 April) Visibility (Leslie, 25 April)

         15   28   Cooking aerosol (Ming, 25 April), Finish Mie scattering: Theory, Phase Functions, Applied - Aerosol sampling: - Single particle, in situ optical counters,  Ensemble (Filters, lidar, satellite),

      29 - Lab #5) Heterogeneous nucleation of water from gas phase, cloud condensation nuclei counters. (Mahesh & Damao, 30 April)

           30   Atmospheric Aerosol measurement - surface, aircraft, balloons, Chemical composition (filtration, x-ray fluorescence, microscopy, mass spectrometry),   Review / Open