- Author
-
Kardos, T. N.
- Title
- Modelling Smoke Flow Using Computational Fluid Dynamics.
- Coporate
- University of Canterbury, Christchurch, New Zealand
- Report
-
Fire Engineering Research Report 96/4,
December 1996,
100 p.
- Keywords
-
computational fluid dynamics
|
smoke
|
backdraft
|
fluid flow
|
gravity current
|
salt water models
|
field models
|
zone models
- Identifiers
- CFDS-FLOW3D; modelling gravity currents; step by step use of the command language
- Abstract
- There have been a number of experimental investigations into the backdraft phenomena. A backdraft occurs in the event of a ventilation source being formed in a compartment, within which a fire has been burning for a sufficiently long enough time to form a deep layer of excess pyrolyzates. The source of fresh air will flow into the compartment in the form of a gravity current. It is the gravity current feature of backdrafts that this research project focuses on. Applicaiton of Computational Fluid Dynamcis (CFD) to fire problems is expanding, including the development of specific programs for fire engineering applications. The experimental programme that was used in this research project highlights the difficulties of analysing fluid flows by using CFD simulations. The Flow3D program was used to obtain a more detailed understanding of the behavior of gravity current, allowing a detailed study of fluid dynamics which cannot be investigated experimentally. The simulations used two different vent configurations, with the CFD model being validated on the experimental results of salt water tank models. The simulations preformed compared well to the experimental data that was used for scaled salt water tank experiments.