Radiation models for thermal flows at low Mach number

Link:

https://doi.org/10.1016/j.jcp.2005.11.015

Autor/in:

Erscheinungsjahr:

2006

Medientyp:

Text

Schlagworte:

Fires in vehicle tunnels
Low Mach number flows
Radiation hydrodynamics
Simplified PN approximations

Beschreibung:

Simplified approximate models for radiation are proposed to study thermal effects in low Mach flow in open tunnels. The governing equations for fluid dynamics are derived by applying a low Mach asymptotic in the compressible Navier-Stokes problem. Based on an asymptotic analysis we show that the integro-differential equation for radiative transfer can be replaced by a set of differential equations which are independent of angle variable and easy to solve using standard numerical discretizations. As an application we consider a simplified fire model in vehicular tunnels. The results presented in this paper show that the proposed models are able to predict temperature in the tunnels accurately with low computational cost. © 2005 Elsevier Inc. All rights reserved.

Lizenz:

info:eu-repo/semantics/closedAccess

Quellsystem:

Forschungsinformationssystem der UHH

Interne Metadaten

Quelldatensatz: oai:www.edit.fis.uni-hamburg.de:publications/95f9e5fb-0d84-4f8a-bb83-67ef9794c146