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P1: Modeling Local and Advective Diffusion of Fuel Vapors to Understand Aqueous Foams in Fire Fighting
Author: Andrew Brandon , Advisor: Dr. Ramagopal Ananth (Naval Research Laboratory, Washington D.C.)
Problem Statement Presentation
Project Proposal
Abstract
The purpose of this project is to model the difusion of fuel vapors through both aqueous film surfaces and aqueous foam surfaces. Aqueous foams are currently being employed to combat fuel pool fires. Once an aqueous foam is applied to a fuel pool fire, an aqueous film forms on the surface of the liquid hydrocarbon pool due to the liquid drainage of the foam. It is the film that is responsible for the suppression of the fuel vapors. Experiments by Leonard [1] and Williams [2] have shown that the film's suppression of fuel vapors is not constant over time. It has become clear that by some process, fuel vapors are able to difuse through the film and foam layers. This presents a hazard because the fuel vapors above the foam layer can re-ignite the fuel pool fire. A model will be created that simulates local and advective difusion of fuel vapors over time until a steady state is reached. The difusion coefficient's space will be explored in an attempt to match this state to the observed steady state concentrations in [1] and [2]. This will allow us to calculate the difusion coefficient of fuel vapors in both film and foam layers.
MidYear Progress Report and
Presentation
Final Presentation ,
Final Report
