HIGH CONCENTRATION BROWNIAN COAGULATION IN JET FLOW USING TWO ENHANCEMENT FORMULATIONS

Abstract

Ultra-fine particle coagulation by Brownian motion at high concentration in pla-nar jet flow is simulated. A Taylor-Series Expansion Method of Moments is em-ployed to solve the particle general dynamic equation. The volume fraction gets high value, very closes to that at the nozzle exit. As the vortex pairing develops, the high volume fraction region rolls out and mixes with the low value region. The enhancement factor given by Trzeciak et al. will be less than one at some specific outer positions, which seems to be less accurate than the one given by Heine et al.

Keywords

Dates

  • Submission Date2012-08-01
  • Revision Date2012-09-01
  • Acceptance Date2012-09-14

DOI Reference

10.2298/TSCI1205519L

References

  1. Zhang, Y., et al., Simulation of Aerosol Dynamics: A Comparative Review of Algorithms Used in Air Quality Models, Aerosol Science and Technology, 31 (1999), 6, pp. 487-514
  2. Johannessen, T., Pratsinis, S. E., Livbjerg, H., Computational Fluid-Particle Dynamics for the Flame Synthesis of Alumina Particles, Chemical Engineering Science, 55 (2000), 1, pp. 177-191
  3. Yu, M. Z., Lin, J. Z., Chan T. L., Numerical Simulation of Nanoparticle Synthesis in Diffusion Flame Reactor, Powder Technology, 181 (2008), 1, pp. 9-20
  4. Yu, M. Z., Lin, J. Z., Chan T. L., Effect of Precursor Loading on Non-Spherical TiO2 Nanoparticle Syn-thesis in a Diffusion Flame Reactor, Chemical Engineering Science, 63 (2008), 9, pp. 2317-2329
  5. Lin, P., et al., Large Eddy Simulation of the Particle Coagulation in High Concentration Particle-Laden Planar Jet Flow, Chinese Journal of Mechanical Engineering, 24 (2011), 6, pp. 947-956
  6. Heine, M. C., Pratsinis, S. E., Agglomerate TiO2 Aerosol Dynamics at High Concentrations, Particle & Particle Systems Characterization, 24 (2007), 1, pp. 56-65
  7. Gimel, J. C., Durand, D., Nicolai, T., Transition between Flocculation and Percolation of a Diffusion-Limited Cluster-Cluster Aggregation Process using Three-Dimensional Monte Carlo Simulation, Physi-cal Review B, 51 (1995), 17, pp. 11348-11357
  8. Fry, D., et al., Enhanced Kinetics and Free-Volume Universality in Dense Aggregating Systems, Physi-cal Review Letters, 89 (2002), 14, pp. 148301.1-148301.4
  9. Wang, Y. M., Lin, J. Z., The Oblique Collision Efficiency of Nanoparticles at Different Angles in Brownian Coagulation, Computers and Mathematics with Applications, 61 (2011), 8, pp. 1917- 1922
  10. Lin, J. Z., Wang, Y. M., Effects of Inter-Particle Interactions and Hydrodynamics on the Brownian Coagulation Rate of Polydisperse Nanoparticles, Modern Physics Letters B, 26 (2012), 3, 10.1142 /S0217984911500102.
  11. Heine, M. C., Pratsinis, S. E., Brownian Coagulation at High Concentration, Langmuir: the ACS Jour-nal of Surfaces and Colloids, 23 (2007), 19, pp. 9882-9890
  12. Buesser, B., Heine, M. C., Pratsinis, S. E., Coagulation of Highly Concentrated Aerosols, Journal of Aerosol Science, 40 (2009), 2, pp. 89-100
  13. Trzeciak, T. M., Podgorski, A., Marijnissen, J. C., Stochastic Calculation of Collision Kernels for Brownian Coagulation in Dense Systems, Proceedings, The 2006 Spring National Meeting and Global Congress on Process Safety, Orlando, Fla., USA
  14. Friedlander, S. K., Smoke, Dust, and Haze: Fundamentals of Aerosol Dynamics, 2nd ed., Oxford Uni-versity Press New York, Oxford, UK, 2000
  15. Yu, M. Z., Lin, J. Z., Chan, T., A New Moment Method for Solving the Coagulation Equation for Par-ticles in Brownian Motion, Aerosol Science and Technology, 42 (2008), 9, pp. 705-713
  16. Yu, M. Z., Lin, J. Z., Taylor-Expansion Moment Method for Agglomerate Coagulation Due to Brow-nian Motion in the Entire Size Regime. Journal of Aerosol Science, 40 (2008), 6, pp. 549-562
  17. Yu, M. Z., Lin, J. Z., Solution of the Agglomerate Brownian Coagulation using Taylor-Expansion Mo-ment Method, Journal of Colloid and Interface Science, 336 (2009), 1, pp. 142-149
  18. Yu, M. Z., Lin, J. Z., Nanoparitcle-Laden Flows via Moment Method: A review, International Journal of Multiphase Flow, 36 (2010), 2, pp.144-151
  19. Yu, M. Z., et al., The Verification of the Taylor-Expansion Moment Method for the Nanoparticle Coa-gulation in the Entire Size Regime Due to Brownian Motion, Journal of Nanoparticle Research, 13 (2011), 5, pp. 2007-2020
Volume 16, Issue 5, Pages1519 -1523