Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Modeling light scattering from Diesel soot particles.

Patricia Hull1, Ian Shepherd, Arlon Hunt

  • 1Tennessee State University, Nashville, Tennessee 37023, USA.

Applied Optics
|June 29, 2004
PubMed
Summary

The Mie model accurately sizes Diesel soot particles using light scattering. It can also estimate particle porosity based on refractive index, explaining experimental data discrepancies.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Electronic structure benchmark calculations of CO<sub>2</sub> fixing elementary chemical steps in RuBisCO using the projector-based embedding approach.

Journal of computational chemistry·2020
Same author

Are we setting about improving the safety of computerised prescribing in the right way? A workshop report.

Informatics in primary care·2010
Same author

Ophthalmology carbon footprint: something to be considered?

Journal of cataract and refractive surgery·2008
See all related articles

Area of Science:

  • Atmospheric Science
  • Optical Physics
  • Materials Science

Background:

  • The Mie model is standard for analyzing light scattering from aerosols.
  • Diesel particle scatterometers use Mueller matrix elements and Mie calculations to determine Diesel exhaust particle size and optical properties.
  • Current Mie model applications show discrepancies, predicting lower refractive indices than solid carbon.

Purpose of the Study:

  • To assess the Mie model's accuracy for irregularly shaped particles like Diesel soot.
  • To understand why Mie calculations yield lower complex refractive indices than expected for solid carbon.
  • To explore alternative light-scattering models for improved accuracy.

Main Methods:

  • Utilized a light-scattering model based on the coupled-dipole approximation for assessment.
  • Compared Mie model predictions with coupled-dipole approximation results for Diesel soot.
  • Analyzed angle-dependent Mueller scattering matrix elements.

Main Results:

  • Mie calculations can determine the largest dimension of irregularly shaped Diesel soot particles.
  • The Mie model's predicted refractive index can be correlated with particle porosity.
  • The coupled-dipole approximation provides insights into the discrepancies observed with the Mie model.

Conclusions:

  • The Mie model is a viable tool for sizing Diesel soot, especially for its largest dimension.
  • Understanding particle porosity is crucial for accurate interpretation of optical properties derived from Mie scattering.
  • Further research using advanced models like the coupled-dipole approximation can refine aerosol optical property analysis.

Related Experiment Videos