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Numerical simulation of tunnel fires using preconditioned finite volume schemes
Zusammenfassung
This article is concerned with the numerical simulation of flows at low Mach numbers which are subject to the gravitational force and strong heat sources. As a specific example for such flows, a fire event in a car tunnel will be considered in detail. The low Mach flow is treated with a preconditioning technique allowing the computation of unsteady flows, while the source terms for gravitation and heat are incorporated via operator splitting. It is shown that a first order discretization in space is not able to compute the buoyancy forces properly on reasonable grids. The feasibility of the method is demonstrated on several test cases.
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@article{urn:nbn:de:hebis:34-2006110915641,
author={Birken, Philipp},
title={Numerical simulation of tunnel fires using preconditioned finite volume schemes},
year={2006}
}
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2006-11-09T13:57:06Z 2006-11-09T13:57:06Z 2006 urn:nbn:de:hebis:34-2006110915641 http://hdl.handle.net/123456789/2006110915641 455636 bytes application/pdf eng Urheberrechtlich geschützt https://rightsstatements.org/page/InC/1.0/ Preconditioning Low Mach number flow Finite volume method Conservation laws 510 Numerical simulation of tunnel fires using preconditioned finite volume schemes Preprint This article is concerned with the numerical simulation of flows at low Mach numbers which are subject to the gravitational force and strong heat sources. As a specific example for such flows, a fire event in a car tunnel will be considered in detail. The low Mach flow is treated with a preconditioning technique allowing the computation of unsteady flows, while the source terms for gravitation and heat are incorporated via operator splitting. It is shown that a first order discretization in space is not able to compute the buoyancy forces properly on reasonable grids. The feasibility of the method is demonstrated on several test cases. open access Birken, Philipp Mathematische Schriften Kassel ;; 06, 08 Mathematische Schriften Kassel 06, 08
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