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High Reynolds Number Computation for Turbulent Heat Transfer in a Pipe Flow
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49. High Reynolds Number Computation for Turbulent Heat Transfer in a Pipe Flow
Shin-ichi Satake8  , Tomoaki Kunugi9 and Ryutaro Himeno10
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Department of Mechanical and Intellectual Systems Engineering, Toyama University, 3190 Gofuku, 930-8555 Toyama, Japan |
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Department of Nuclear Engineering, Kyoto University, 606-8501 Yoshida, Sakyo-ku, Kyoto, Japan |
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Dept. of Computer and Information, RIKEN, 2-1 Hirosawa, 351-0198 Saitama, Wako |
Abstract
Turbulent transport computations for fully-developed turbulent pipe flow were carried out by means of a direct numerical simulation
(DNS) procedure. To investigate the effect of Reynolds number on the turbulent sturcures, the Reynolds number based on a friction
velocity and a pipe radius was set to be Re
τ = 150, 180, 360, 500, 1050. The number of maximum computational grids used for Re
τ = 1050 is 1024 x 512 x 768 in the z-, r-and ϕ -directions, respectively. The friction coefficients are in good agreement with the empirical correlation. The turbulent
quantities such as the mean flow, turbulent stresses, turbulent kinetic energy budget, and the turbulent statistics were obtained.
It is found that the turbulent structures depend on these Reynolds numbers.
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