The release and transport of a suppressant agent into an enclosed compartment is sensitive to local geometrical features or clutter that is difficult to resolve numerically without using an excessively large CFD grid. Such examples include wire bundles or hydraulic lines in engine compartments of either ground vehicles or aircraft. Capturing these features on a grid will result in extremely small time steps for explicit time-accurate numerical simulations of agent release and subsequent fire suppression. An alternative approach is to use a subgrid scale (SGS) model to represent the macroscopic effects of these small features using reasonably sized CFD grid cells.
Citation: Special Publication (NIST SP) - 984-4
NIST Pub Series: Special Publication (NIST SP)
Pub Type: NIST Pubs