A novel approach to determine charring of wood in natural fire implemented in a coupled heat-mass-pyrolysis model

Pečenko, Robert (avtor), Hozjan, Tomaž (avtor)

The paper presents a novel approach to determine charring of wood exposed to standard and natural fire that is based on a new numerical model named PyCiF. The new model couples an advanced 2D heat-mass model with a pyrolysis model. A new charring criterion based on a physical phenomenon is implemented in the PyCiF model to determine charring of wood. This presents the main advantage of the new PyCiF model in comparison to common modelling approaches, which require an empirical value of the charring temperature that is often called the char front temperature. The fact that the char front temperature is not an explicit value as assumed by the isotherm 300 °C is advantageously considered in the presented approach where an assumed empirical value of the char front temperature is not directly required to determine the thickness of char layer. The validation of the PyCiF model against experimental results showed great model accuracy, meaning that the model is appropriate for the evaluation of charring depths of timber elements exposed to the standard fire as well as the natural fires. Additionally, as shown in the case study, the presented approach also enables to determine the char front temperature for various natural fire exposures. This will be especially important for the upgrade of the new design methods for fire safety of timber elements exposed to natural fire given in the various design codes such as Eurocode 5.

• Jezik: Angleški jezik
• Ključne besede: civil engineering, charring, charring criterion, coupled numerical model, fire, pyrolysis, wood
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FGG - Fakulteta za gradbeništvo in geodezijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2021
• Št. strani: Str. 148–158
• Številčenje: Vol. 75, iss. 2
• PID: 20.500.12556/RUL-121007
• UDK: 624.07
• ISSN pri članku: 1437-434X
• DOI: 10.1515/hf-2020-0081
• COBISS.SI-ID: 29083139
• Datum objave v RUL: 28.09.2020

Gradivo je del revije

• Naslov: Holzforschung
• Skrajšan naslov: Holzforschung
• Založnik: De Gruyter
• ISSN: 1437-434X
• COBISS.SI-ID: 22548741

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: gradbeništvo, oglenenje, kriterij oglenenja, povezani numerični model, požar, piroliza lesa, les

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: Z2-8160
• Naslov: Modeliranje pirolize za določitev poškodovanosti lesa pri naravnem požaru

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0260
• Naslov: Mehanika konstrukcij