- Author
-
Tuovinen, H.
- Title
- CFD Modelling of Under-Ventilated Fires.
- Coporate
- Swedish National Testing Institute, Boras, Sweden
- Report
-
SP REPORT 1996:41,
1996,
25 p.
- Keywords
-
computational fluid dynamics
|
reaction kinetics
|
carbon monoxide
|
experiments
- Identifiers
- studies of carbon monoxide formation in room fires; laminar flamelet model; CFD simulation of Lund fire experiments in under-ventilated conditions
- Abstract
- Combustion of hydrocarbons in under-ventilated conditions has been simulated and the results have been compared with laboratory tests. The simulations have been performed using the CFD (Computational Fluid Dynamics) code SOFIE. Two different combustion models in SOFIE have been considered; the laminar flamelet model and Magnussen's eddy dissipation concept (EDC). Adiabatic and non-adiabatic cases have been simulated with both combustion models. A flamelet library, i.e., a database for laminar flamelet relationships has been created from which the already calculated or measured flamelets can be extracted during the flow field calculations with CFD. This first approach, which itself is quite crude, and with the flamelet calculations based on just a few species, can nevertheless predict the formation and the spreading of hazardous products of combustion in under-ventilated enclosures reasonably well. This model should be especially suitable for predicting fire problems in underground facilities, for example in road tunnels.