Large eddy simulations of a turbulent thermal plume
(2007) In Heat and Mass Transfer 43(6). p.503-514- Abstract
- Large eddy simulations of a three-dimensional turbulent thermal plume in an open environment have been carried out using a self-developed parallel computational fluid dynamics code SMAFS (smoke movement and flame spread) to study the thermal plume's dynamics including its puffing, self-preserving and air entrainment. In the simulation, the sub-grid stress was modeled using both the standard Smagorinsky and the buoyancy modified Smagorinsky models, which were compared. The sub-grid scale (SGS) scalar flux in the filtered enthalpy transport equation was modeled based on a simple gradient transport hypothesis with constant SGS Prandtl number. The effect of the Smagorinsky model constant and the SGS Prandtl number were examined. The... (More)
- Large eddy simulations of a three-dimensional turbulent thermal plume in an open environment have been carried out using a self-developed parallel computational fluid dynamics code SMAFS (smoke movement and flame spread) to study the thermal plume's dynamics including its puffing, self-preserving and air entrainment. In the simulation, the sub-grid stress was modeled using both the standard Smagorinsky and the buoyancy modified Smagorinsky models, which were compared. The sub-grid scale (SGS) scalar flux in the filtered enthalpy transport equation was modeled based on a simple gradient transport hypothesis with constant SGS Prandtl number. The effect of the Smagorinsky model constant and the SGS Prandtl number were examined. The computation results were compared with experimental measurements, thermal plume theory and empirical correlations, showing good agreement. It is found that both the buoyancy modification and the SGS turbulent Prandtl number have little influence on simulation. However, the SGS model constant C (s) has a significant effect on the prediction of plume spreading, although it does not affect much the prediction of puffing. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/674176
- author
- Yan, Zhenghua LU
- organization
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Heat and Mass Transfer
- volume
- 43
- issue
- 6
- pages
- 503 - 514
- publisher
- Springer
- external identifiers
-
- wos:000244197800001
- scopus:33847241286
- ISSN
- 1432-1181
- DOI
- 10.1007/s00231-006-0127-5
- language
- English
- LU publication?
- yes
- id
- 26d2206c-3a30-4104-8423-9897d5b0b364 (old id 674176)
- date added to LUP
- 2016-04-01 12:34:13
- date last changed
- 2022-03-21 06:05:32
@article{26d2206c-3a30-4104-8423-9897d5b0b364,
abstract = {{Large eddy simulations of a three-dimensional turbulent thermal plume in an open environment have been carried out using a self-developed parallel computational fluid dynamics code SMAFS (smoke movement and flame spread) to study the thermal plume's dynamics including its puffing, self-preserving and air entrainment. In the simulation, the sub-grid stress was modeled using both the standard Smagorinsky and the buoyancy modified Smagorinsky models, which were compared. The sub-grid scale (SGS) scalar flux in the filtered enthalpy transport equation was modeled based on a simple gradient transport hypothesis with constant SGS Prandtl number. The effect of the Smagorinsky model constant and the SGS Prandtl number were examined. The computation results were compared with experimental measurements, thermal plume theory and empirical correlations, showing good agreement. It is found that both the buoyancy modification and the SGS turbulent Prandtl number have little influence on simulation. However, the SGS model constant C (s) has a significant effect on the prediction of plume spreading, although it does not affect much the prediction of puffing.}},
author = {{Yan, Zhenghua}},
issn = {{1432-1181}},
language = {{eng}},
number = {{6}},
pages = {{503--514}},
publisher = {{Springer}},
series = {{Heat and Mass Transfer}},
title = {{Large eddy simulations of a turbulent thermal plume}},
url = {{http://dx.doi.org/10.1007/s00231-006-0127-5}},
doi = {{10.1007/s00231-006-0127-5}},
volume = {{43}},
year = {{2007}},
}