Accession Number:

ADA281410

Title:

Fractal Aggregate Random Media Analysis and Applications

Descriptive Note:

Final rept. 15 Jul 1991-14 Jul 1994

Corporate Author:

NEW MEXICO STATE UNIV LAS CRUCES PHYSICAL SCIENCE LAB

Personal Author(s):

• Ding, Kung-Hau

Report Date:

1994-03-07

Pagination or Media Count:

41.0

Abstract:

The research performed during the period of July 1991 to September 1993 was focused on the theoretical formulations and numerical simulations of electromagnetic wave interaction with random fractal clusters and electromagnetic wave propagation and scattering in media with adhesive scatterers, and their applications in atmospheric aerosols and random media consisting of aggregated particles. The major accomplishments in this period include Development of a fractal-based aggregated model and a rigorous T-matrix approach for studying the light scattering and absorption by agglomerated particles. We have simulated the structure of random clusters, determine the fractal dimension, and investigated their optical properties Development of a sticky particle model for simulating a random medium consisting of aggregated particles. We have studied the propagation and scattering of waves in such random media and performed computer simulations to determine the cluster size distribution and the fractal dimension for agglomerates. In the following, we describe these major accomplishments.

Descriptors:

• *FRACTALS
• *LIGHT SCATTERING
• *ELECTROMAGNETIC WAVE PROPAGATION
• *AEROSOLS
• COMPUTERIZED SIMULATION
• CLUSTERING
• ABSORPTION
• DISTRIBUTION FUNCTIONS
• AGGLOMERATES
• ATMOSPHERICS
• PARTICLE COLLISIONS
• ADHESIVES
• MEDIA
• AGGREGATES(MATERIALS)
• OPTICAL PROPERTIES
• INTERACTIONS
• FORMULATIONS

Subject Categories:

• Optics
• Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE