- Author
- Wheatley, C. J. | Holford, G. F. | Tickle, G. A.
- Title
- Fire Assessment in Nuclear Plant Modelling Smoke Propagation in Stratified and Non-Stratified Layers. Final Report.
- Coporate
- AEA Reactor Services, Risley, Warrington AEA Safety and Reliability, Culcheth, Warrington
- Sponsor
- Health and Safety Executive, UK
- Report
- AEA RS 5282, March 1992, 100 p.
- Keywords
- nuclear power plants | smoke | smoke flow | compartments | thermophysical properties | heat transfer | mass transfer | radiative heat transfer | algorithms | specifications | equations
- Identifiers
- thermophysical properties of the atmosphere; intra-compartment mass and energy conservation; intra-structure heat transfer; one and two-layer models
- Abstract
- We have developed a modelling framework of smoke flow in buildings which treats integrally the presence of, in some compartments, a well-mixed atmosphere and, in others, a strongly stratified atmosphere that has formed two distinct layers of gas. We have suggested models for many of the heat and mass transfer processes identified in the framework. Particular attention has been paid to the modelling of transitions between the flow regimes and intra-compartment radiative heat transfer, where existing treatments are not very satisfactory. We have also developed a computational framework suited to predicting smoke movement in a building with many compartments. The framework includes efficient computational methods for the solution of the model equations and a computer program specification. This should enable model developers more easily to use the results of our work and hence lead to improved models.