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Sensitivity of the predicted convective heat transfer in a cooled room to the computational fluid dynamics simulation approach

Kim Goethals (UGent) and Arnold Janssens (UGent)
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Abstract
Computational fluid dynamics (CFD) plays an increasingly important role in the design, analysis and optimization of engineering systems. However, CFD does not necessarily provide reliable results. The most crucial numerical solution error is caused by inadequate grid resolution, and the key modelling error sources in CFD in ventilated indoor environments are turbulence modelling and diffuser modelling. Many researchers already proposed guidelines, but they based their analyses on local variables. In response, underlying study intended to verify the impact of the CFD simulation approach on the convective heat flux, an integral quantity. The authors tested several grids, Reynolds averaged Navier–Stokes turbulence models and diffuser models for three convection regimes in a cooled room. The diffuser modelling had a much larger impact than the grid and the turbulence modelling, as long as the jet dominated the airflow. So, CFD users, who want to model forced/mixed convection airflow indoors, certainly need to pay attention to the diffuser modelling.
Keywords
VALIDATION, CFD, NOZZLE DIFFUSER, TURBULENCE MODELS, NATURAL-CONVECTION, AIR-FLOW, diffuser modelling, VERIFICATION, ENVIRONMENTS, OPENINGS, DESIGN, computational fluid dynamics, sensitivity, convective heat transfer, grid convergence, turbulence modelling

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Citation

Please use this url to cite or link to this publication:

Chicago
Goethals, Kim, and Arnold Janssens. 2013. “Sensitivity of the Predicted Convective Heat Transfer in a Cooled Room to the Computational Fluid Dynamics Simulation Approach.” Journal of Building Performance Simulation 6 (6): 420–436.
APA
Goethals, Kim, & Janssens, A. (2013). Sensitivity of the predicted convective heat transfer in a cooled room to the computational fluid dynamics simulation approach. JOURNAL OF BUILDING PERFORMANCE SIMULATION, 6(6), 420–436.
Vancouver
1.
Goethals K, Janssens A. Sensitivity of the predicted convective heat transfer in a cooled room to the computational fluid dynamics simulation approach. JOURNAL OF BUILDING PERFORMANCE SIMULATION. 2013;6(6):420–36.
MLA
Goethals, Kim, and Arnold Janssens. “Sensitivity of the Predicted Convective Heat Transfer in a Cooled Room to the Computational Fluid Dynamics Simulation Approach.” JOURNAL OF BUILDING PERFORMANCE SIMULATION 6.6 (2013): 420–436. Print.
@article{3063980,
  abstract     = {Computational fluid dynamics (CFD) plays an increasingly important role in the design, analysis and optimization of engineering systems. However, CFD does not necessarily provide reliable results. The most crucial numerical solution error is caused by inadequate grid resolution, and the key modelling error sources in CFD in ventilated indoor environments are turbulence modelling and diffuser modelling. Many researchers already proposed guidelines, but they based their analyses on local variables. In response, underlying study intended to verify the impact of the CFD simulation approach on the convective heat flux, an integral quantity. The authors tested several grids, Reynolds averaged Navier--Stokes turbulence models and diffuser models for three convection regimes in a cooled room. The diffuser modelling had a much larger impact than the grid and the turbulence modelling, as long as the jet dominated the airflow. So, CFD users, who want to model forced/mixed convection airflow indoors, certainly need to pay attention to the diffuser modelling.},
  author       = {Goethals, Kim and Janssens, Arnold},
  issn         = {1940-1493},
  journal      = {JOURNAL OF BUILDING PERFORMANCE SIMULATION},
  keyword      = {VALIDATION,CFD,NOZZLE DIFFUSER,TURBULENCE MODELS,NATURAL-CONVECTION,AIR-FLOW,diffuser modelling,VERIFICATION,ENVIRONMENTS,OPENINGS,DESIGN,computational fluid dynamics,sensitivity,convective heat transfer,grid convergence,turbulence modelling},
  language     = {eng},
  number       = {6},
  pages        = {420--436},
  title        = {Sensitivity of the predicted convective heat transfer in a cooled room to the computational fluid dynamics simulation approach},
  url          = {http://dx.doi.org/10.1080/19401493.2012.737833},
  volume       = {6},
  year         = {2013},
}

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