- Author
- Hostikka, S.
- Title
- Radiation Modeling in the CFD Simulation of Fires. BFRL Fire Research Seminar. VHS Video.
- Coporate
- VTT-Technical Research Center of Finland, Espoo
- Report
- Video, May 22, 2001,
- Keywords
- computational fluid dynamics | thermal radiation | solid surfaces | radiative heat transfer | transport equation | cone calorimeters
- Abstract
- Modeling of the thermal radiation is needed in the computational fluid dynamics (CFD) simulation of large scale fires. The role of the radiation is especially important in the simulation of ignition and flame spread on solid surfaces. In this work, the radiative heat transfer is calculated using the finite volume method (FVM), which solves the radiative transport equation in a non-scattering medium. The angular dependence of the radiation is accurately captured by solving the transport equation in a large number of directions (typically on the order of a hundred), ensuring small control angles. The spectral dependence of the radiation is either neglected (gray gas assumption) or approximated using a wide band model. The model is implemented in the development version of the NIST Fire Dynamics Simulator. The applications include the simulation of the ASTM Cone Calorimeter, turbulent diffusion flames and large scale flame spread.