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A low-re RSTM model for computations of heat transfer and fluid flow for impingement and convective cooling

Jia, Rongguang LU and Sundén, Bengt LU (2004) 2004 ASME Turbo Expo 3. p.429-438
Abstract
A new Reynolds stress transport model (RSTM) aimed for engineering applications is proposed with consideration of near-wall turbulence. This model employs the SSG pressure strain term, the ω equation, and the SST model for the shear stresses at the near-wall region (say y<sup>+</sup> less than or equal 30). The models are selected based on the following merits: The SSG RSTM model performs well in the fully turbulent region and does not need the wall normal vectors; the ω equation can be integrated down to the wall without damping functions; The SST model is a proper two-equation model that performs well for flows with adverse pressure gradient, while most two-equation models can have a good prediction of the shear stresses. A... (More)
A new Reynolds stress transport model (RSTM) aimed for engineering applications is proposed with consideration of near-wall turbulence. This model employs the SSG pressure strain term, the ω equation, and the SST model for the shear stresses at the near-wall region (say y<sup>+</sup> less than or equal 30). The models are selected based on the following merits: The SSG RSTM model performs well in the fully turbulent region and does not need the wall normal vectors; the ω equation can be integrated down to the wall without damping functions; The SST model is a proper two-equation model that performs well for flows with adverse pressure gradient, while most two-equation models can have a good prediction of the shear stresses. A function is selected for the blending of the RSTM and SST. Three cases are presented to show the performance of the present model: (1) fully developed channel flow with Reτ = 395, (2) backward-facing step with an expansion ratio of 1.2 and Re = 5,200 base on the step height, (3) circular impingement with the nozzle-to-wall distance H = 4D and Re = 20,000. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Stagnation region, Reynold stress, Impingment, Convective cooling, Cooling ducts
host publication
Proceedings of the ASME Turbo Expo 2004
volume
3
pages
429 - 438
publisher
American Society Of Mechanical Engineers (ASME)
conference name
2004 ASME Turbo Expo
conference location
Vienna, Austria
conference dates
2004-06-14 - 2004-06-17
external identifiers
  • scopus:10244264782
language
English
LU publication?
yes
id
feef13ee-038e-4406-b4c7-0af41ed57577 (old id 614494)
date added to LUP
2007-11-26 19:56:50
date last changed
2018-11-21 21:04:09
@inproceedings{feef13ee-038e-4406-b4c7-0af41ed57577,
  abstract     = {A new Reynolds stress transport model (RSTM) aimed for engineering applications is proposed with consideration of near-wall turbulence. This model employs the SSG pressure strain term, the ω equation, and the SST model for the shear stresses at the near-wall region (say y&lt;sup&gt;+&lt;/sup&gt; less than or equal 30). The models are selected based on the following merits: The SSG RSTM model performs well in the fully turbulent region and does not need the wall normal vectors; the ω equation can be integrated down to the wall without damping functions; The SST model is a proper two-equation model that performs well for flows with adverse pressure gradient, while most two-equation models can have a good prediction of the shear stresses. A function is selected for the blending of the RSTM and SST. Three cases are presented to show the performance of the present model: (1) fully developed channel flow with Reτ = 395, (2) backward-facing step with an expansion ratio of 1.2 and Re = 5,200 base on the step height, (3) circular impingement with the nozzle-to-wall distance H = 4D and Re = 20,000.},
  author       = {Jia, Rongguang and Sundén, Bengt},
  keyword      = {Stagnation region,Reynold stress,Impingment,Convective cooling,Cooling ducts},
  language     = {eng},
  location     = {Vienna, Austria},
  pages        = {429--438},
  publisher    = {American Society Of Mechanical Engineers (ASME)},
  title        = {A low-re RSTM model for computations of heat transfer and fluid flow for impingement and convective cooling},
  volume       = {3},
  year         = {2004},
}