Large scale simulation of high pressure water mist systems

Topi Sikanen, Jukka Vaari, Simo Hostikka

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Water mists systems are used to protect people and property from fires. They suppress fires by three main mechanisms: removal of heat from the gases, displacement of oxygen by water vapour and attenuation of radiation by droplets. Correct prediction of these mechanisms hinges on accurate modeling of droplet transport. This paper discusses the modeling and simulation of high speed water mist systems using Large Eddy Simulation and a Lagrangian description of the spray. The focus is on the droplet transport. Particular attention is given to the droplet injection model and sub models for coupling of the dispersed and continuous phases. Effects of turbulence modeling on droplet transport is explored. The modeling results are compared to experimental data from both small and large scale experiments.
Original languageEnglish
Pages (from-to)77-88
JournalWIT Transactions on Engineering Sciences
Volume79
DOIs
Publication statusPublished - 2013
MoE publication typeNot Eligible
Event7th International Conference on Computational and Experimental Methods in Multiphase and Complex Flow, MPF 2013 - Coruna, Spain
Duration: 3 Jul 20135 Jul 2013

Fingerprint

Fog
Water
Fires
Steam
Large eddy simulation
Hinges
Water vapor
Turbulence
Gases
Oxygen
Radiation
Experiments

Keywords

  • interphase momentum transfer
  • lagrangian-eulerian
  • large eddy simulation
  • large scale
  • turbulence modeling
  • water mist

Cite this

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abstract = "Water mists systems are used to protect people and property from fires. They suppress fires by three main mechanisms: removal of heat from the gases, displacement of oxygen by water vapour and attenuation of radiation by droplets. Correct prediction of these mechanisms hinges on accurate modeling of droplet transport. This paper discusses the modeling and simulation of high speed water mist systems using Large Eddy Simulation and a Lagrangian description of the spray. The focus is on the droplet transport. Particular attention is given to the droplet injection model and sub models for coupling of the dispersed and continuous phases. Effects of turbulence modeling on droplet transport is explored. The modeling results are compared to experimental data from both small and large scale experiments.",
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Large scale simulation of high pressure water mist systems. / Sikanen, Topi; Vaari, Jukka; Hostikka, Simo.

In: WIT Transactions on Engineering Sciences, Vol. 79, 2013, p. 77-88.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Large scale simulation of high pressure water mist systems

AU - Sikanen, Topi

AU - Vaari, Jukka

AU - Hostikka, Simo

PY - 2013

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AB - Water mists systems are used to protect people and property from fires. They suppress fires by three main mechanisms: removal of heat from the gases, displacement of oxygen by water vapour and attenuation of radiation by droplets. Correct prediction of these mechanisms hinges on accurate modeling of droplet transport. This paper discusses the modeling and simulation of high speed water mist systems using Large Eddy Simulation and a Lagrangian description of the spray. The focus is on the droplet transport. Particular attention is given to the droplet injection model and sub models for coupling of the dispersed and continuous phases. Effects of turbulence modeling on droplet transport is explored. The modeling results are compared to experimental data from both small and large scale experiments.

KW - interphase momentum transfer

KW - lagrangian-eulerian

KW - large eddy simulation

KW - large scale

KW - turbulence modeling

KW - water mist

U2 - 10.2495/MPF130071

DO - 10.2495/MPF130071

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JO - WIT Transactions on Engineering Sciences

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