Evaporation of a Thickened Agent Simulant from Oak and Hickory Leaves
Abstract
This study identifies the physical parameters and determines the extent of their influence on the evaporation of the candidate thickened liquid agent simulant diethyl malonate deposited as droplets on oak and hickory leaves. Controlled evaporation/persistency experiments were conducted in a low-speed, open-circuit wind tunnel facility at a constant temperature of 60 F. In each test, vapor concentrations downstream from an area (4 ft by 1 ft) contaminated by uniform-sized droplets (2 mm diameter) and a contamination density of 30 g/m2 were continuously monitored with a Miran IA gas analyzer. Two factorial experiments were performed according to a bi-level design of four variables. The four variables treated in this study included liquid viscosity (100/1,000 centipoise), average wind speed (3/11 mph), leaf surface (top/bottom), and leaf type (oak/hickory) in Experiment 1 and leaf condition/age in Experiment 2. An elaborate set of tables is provided; the vapor concentration values downstream from the contaminated area, the residual droplet mass, the cumulative mass recovered as vapor, and the droplet evaporation rate as a function of time.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1990
- Accession Number
- ADA232136
Entities
People
- Franklin Hardaway
- Leonard Edwards
- William A. Cooper