Computation of Spray Dynamics by Direct Solution of Moment Transport Equations
Abstract
In many spray applications, it is important to know the size and velocity distribution of the drops. Conventional particle tracking techniques can require prohibitively large computational times, especially in regions of low droplet number density or when detailed statistics are desired. In this paper, we develop a method to compute the statistics directly by solving a series of moment transport equations. A maximum entropy model is used to close higher-order moments appearing in the equations. Solution of these equations gives not only the transported moments of the spray, but also the maximum entropy probability distribution function from which further statistics can be obtained. The method has been tested on a quasi-one-dimensional spray problem to assess its viability. Submodels which account for the effects of the gas on the drops, including turbulence modification and correlation between the gas and drop velocities, are incorporated. Results for expected quantities are in good agreement with the solution from a particle tracking simulation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 27, 1999
- Accession Number
- ADA410053
Entities
People
- Christopher F. Edwards
- Mark R. Archambault
Organizations
- Air Force Research Laboratory