The Orientation Distribution of Nonspherical Aerosol Particles within a Cloud.
Abstract
Having performed a study on the orientation density function (o.d.f.) of small spheroidal aerosol particles in a general field of an arbitrary strength. It became possible to treat the orientation problem in a turbulent medium. To this end, two interconnected physical models were applied. In the first, The Realizations Model, it was assumed that the turbulent particle field constituted an ensemble of an infinite number of realizations, j, each one of which is characterized by one set of the o.d.f., F(j) (x,t), values. The latter was taken in that model to essentially coincide with previously found solution of the Fokker-Planck equation in the field of the realization. The Micro-turbulence Model, a relation between the so-called turbulent rotational diffusion coefficient of the particles and the physical characteristics of the fluid field was supplied. This coefficient and the Brownian rotational diffusion one, compose the effective diffusion coefficient.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1984
- Accession Number
- ADA157363
Entities
People
- I. Gallily
Organizations
- Hebrew University of Jerusalem