Evaluation of models and methods to simulate thermal radiation in indoor spaces

Li, X, Yan, Y and Tu, J 2018, 'Evaluation of models and methods to simulate thermal radiation in indoor spaces', Building and Environment, vol. 144, pp. 259-267.


Document type: Journal Article
Collection: Journal Articles

Title Evaluation of models and methods to simulate thermal radiation in indoor spaces
Author(s) Li, X
Yan, Y
Tu, J
Year 2018
Journal name Building and Environment
Volume number 144
Start page 259
End page 267
Total pages 9
Publisher Pergamon Press
Abstract The theoretical models of Surface-to-Surface (S2S) thermal radiation, including the Monte Carlo model, Discrete Transfer model, Modest model and Heat-Flux-Split approach, are evaluated in terms of the predictive accuracy and CFD computational cost when simulating indoor thermal flows. It is demonstrated that the inclusion of thermal radiation in the CFD model is vital as the air temperature in the lower levels can be underpredicted while the heater surface temperature can be significantly overpredicted if the radiative effects are ignored. In addition, the predicted temperature distribution on the heat-receiving solid surfaces is highly sensitive to the selected radiation model. The comparisons demonstrate that the Monte Carlo model and Discrete Transfer model have comparable predictive capabilities while the latter requires less CPU time and is more computationally efficient. The appropriate number of the representative photons and rays are also recommended for the Monte Carlo model and Discrete Transfer model, respectively.
Subject Environmental Science and Management not elsewhere classified
Keyword(s) CFD
Computational cost
Indoor environment
Radiative heat transfer
Theoretical models
DOI - identifier 10.1016/j.buildenv.2018.08.033
Copyright notice © 2018 Elsevier Ltd. All rights reserved.
ISSN 0360-1323
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