Accession Number : AD0738111

Title :   Evaluation of a Computerized Technique for Determining Particle Distribution Parameters from Aerosol Mass Decay Data.

Descriptive Note : Technical rept. Jun 69-May 70,

Corporate Author : EDGEWOOD ARSENAL MD

Personal Author(s) : Jolliffe,Robert V.

Report Date : FEB 1972

Pagination or Media Count : 53

Abstract : A computerized technique was evaluated for determining the particle distribution parameters from the inversion of aerosol mass decay data. These estimates of the distribution parameters were derived by applying a least squares solution to the nonlinear decay data. This technique was applied to both theoretical and experimental mass decay data for stirred aerosols in a closed chamber. The effects of variations in the experimental input decay data or the derived particle characterization was studied. It was found that: (1) this computerized inversion technique will give a unique fit to nonlinear data described by an equation which can be integrated in closed form, (2) this technique cannot deduce the mathematical description of the initial particle distribution form, since this equation is assumed a priori, but it will give a qualitative description of an aerosol's modal characteristics, and (3) within the limits imposed by the experimental input data this technique will accurately define basic aerosol characteristics. (Author)

Descriptors :   (*AEROSOLS, DISTRIBUTION FUNCTIONS), (*COMPUTER PROGRAMMING, AEROSOLS), ALGORITHMS, LEAST SQUARES METHOD, COMPUTER PROGRAMS, CHEMICAL WARFARE AGENTS, CURVE FITTING

Subject Categories : Computer Programming and Software
      Chemical, Biological and Radiological Warfare

Distribution Statement : APPROVED FOR PUBLIC RELEASE