Abstract
An approach for modelling of fire in halls at solid materials burning, based on gas phase combustion models in ANSYS/CFX, is proposed. The models are suitable for quick prediction of the flue gases distribution and thermal loads on the building envelopes at a design stage. They was applied for numerical simulation of such processes in a coffee storage hall at different fire positions and forced anti-smoke ventilation. The thermal, fluid flow and concentration field were obtained at the modelled scenarios. Maximal thermal loads on the building envelopes are established at the case of fire near their non-streamlined parts.
Highlights
The prediction of smoke and heat distribution at the cases of fire is important for the sizing and mounting of the building components and materials, smoke vents, sprinkler and ventilation systems [1]
The models are suitable for quick prediction of the flue gases distribution and thermal loads on the building envelopes at a design stage
Different CFD techniques are used for fire modeling: Direct Numerical Simulation (DNS), Large Eddy Simulation (LES) and Reynolds-Averaged Navier-Stokes (RANS) [2]
Summary
The prediction of smoke and heat distribution at the cases of fire is important for the sizing and mounting of the building components and materials, smoke vents, sprinkler and ventilation systems [1]. LES is suitable for “large eddies” modeling at relatively coarse space meshes It is the base of the computational code Fire Dynamics Simulator (FDS), widely used for fire analysis at large-scale buildings [1, 5 -7]. The aim of the present study is to develop and test a model for quick numerical simulation of fires in buildings at burning of solid materials, based on RANS and gas phase combustion models, available in ANSYS. An idea for such modeling is mention in [10].
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