Three-dimensional Simulation Of A Fire-resistance Furnace

Welch, Stephen; Rubini, P.A.

doi:10.3801/iafss.fss.5-1009

Cited by 26 publications

(19 citation statements)

References 6 publications

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“…[52,[56][57][58][59]). These have all arrived to the conclusion that when the time-history of a temperature inside a furnace is the control variable, the thermal boundary conditions at the exposed surface are considerably and inevitably dependent on the furnace linings, emissivity of the gases, and thermal properties the test specimen itself.…”

Section: Control By Temperaturementioning

confidence: 99%

A Heat-Transfer Rate Inducing System (H-TRIS) Test Method

Maluk

Bisby

Krajcovic

et al. 2019

Fire Safety Journal

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a b s t r a c t A novel fire testing method, named the Heat-Transfer Rate Inducing System (H-TRIS), is presented and described in this paper. The method directly controls the thermal boundary conditions imposed on a test specimen by controlling a specified time-history of incident radiant heat flux at its exposed surface. Accounting for the absorptivity and thermal losses at the exposed surface of the test specimen, H-TRIS can be programmed to control the net heat flux at the exposed surface; thus controlling the in-depth time dependent temperature distributions within the test specimen. H-TRIS can be used for imposing a wide range of time-histories of incident radiant heat flux (e.g. constant, linear, stepped), or in-depth time dependent temperature distributions (i.e. specified thermal gradients). Notably, this enables simulation of thermal boundary conditions experienced by materials or structures exposed to any source of heatduring a conventional fire test (e.g. standard furnace test), a large-scale fire test, a real fire, or some other thermal boundary conditions calculated using a fire model (e.g. zone or computational fluid dynamics model). H-TRIS enables complementary experimental studies with excellent repeatability at comparatively low economic and temporal costs relative to traditional furnace test methods, thus permitting multiple repeat tests and statistical studies of response to heating. Application of H-TRIS within a research project studying heat-induced concrete spalling is briefly presented and discussed, to illustrate the significance and novelty of the new fire testing method.

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Section: Control By Temperaturementioning

confidence: 99%

A Heat-Transfer Rate Inducing System (H-TRIS) Test Method

Maluk

Bisby

Krajcovic

et al. 2019

Fire Safety Journal

View full text Add to dashboard Cite

show abstract

“…The fluid flow, combustion process, and other transport phenomena in the gas phase are commonly solved using computational fluid dynamics (CFD). For example, CFD simulations of the gas phase in a fire resistance test furnace were carried out by Welch and Rubini using the CFD code SOFIE (see Rubini). They predicted the time‐dependent temperature in the furnace at the measurement positions.…”

Section: Introductionmentioning

confidence: 99%

Development of a numerical approach based on coupled CFD/FEM analysis for virtual fire resistance tests—Part A: Thermal analysis of the gas phase combustion and different test specimens

et al. 2018

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Summary In the present two‐parted study, a numerical approach is shown to consider fire resistance tests in virtual space, including the combustion, thermal analysis of the test specimen, and the deformation process. This part is dealing with the combustion process and thermal analysis of different building materials tested in a fire resistance furnace. Instead of using coupled computational fluid dynamics (CFD)/finite element method simulation for the combustion and thermal heat conduction in the solid, which is commonly used in literature, the present approach considers these transport phenomena in one CFD simulation. This method enables a two‐way coupling between the gas phase and the solid material, where chemical reactions and the release of volatile components into the gas phase can occur (eg, release of water vapour from gypsum). To validate the numerical model, a fire resistance test of a steel door, which is a multilayer construction, and a wall made of gypsum blocks were experimentally and numerically investigated. Due to the chemical reactions inside the gypsum, water vapour is released to the gas phase reducing the flue gas temperature about 80 K. This effect was taken into account using a two‐way coupling in the CFD model, which predicted temperatures in close accordance to the measurement.

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“…Because of these drawbacks, numerical model to predict fire resistance of structural elements in a horizontal furnace is developed. First attempts to apply CFD modelling in standard testing are described in [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

10.02: Numerical simulation of fire‐resistance test of steel beam

et al. 2017

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The paper describes a virtual furnace for fire-resistance tests following standard fire conditions. The model takes advantage of great possibilities of computational fluid dynamics code Fire Dynamics Simulator. The model is based on an accurate representation of a real fire furnace of fire laboratory PAVUS a.s. located in the Czech Republic. It includes geometry of the real furnace, material properties of the furnace linings, burners, ventilation conditions and also a tested specimen with measurement devices. The model allows controlling of gas temperature and the static over pressure in the volume of the furnace as it is specified in requirements of European standard for fire resistance tests. The accuracy of the model is validated to a fire test of empty horizontal furnace executed in the fire laboratory, which was except other carried out to harmonize initial settings of burners in the model. Then, the virtual furnace is used to investigate thermal behaviour for fireresistance test of a steel beam. The results of the virtual furnace illustrate the great potential for investigating the thermal behaviour of fire-resistance tests.

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Three-dimensional Simulation Of A Fire-resistance Furnace

Cited by 26 publications

References 6 publications

A Heat-Transfer Rate Inducing System (H-TRIS) Test Method

A Heat-Transfer Rate Inducing System (H-TRIS) Test Method

Development of a numerical approach based on coupled CFD/FEM analysis for virtual fire resistance tests—Part A: Thermal analysis of the gas phase combustion and different test specimens

10.02: Numerical simulation of fire‐resistance test of steel beam

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