Effects of grid resolution on axisymmetric stern flows computed with an incompressible viscous flow solver
作者:
Jing‐Fa Tsai,
Chao‐Ho Sung,
MichaelJ. Griffin,
ThomasT. Huang,
期刊:
Journal of the Chinese Institute of Engineers
(Taylor Available online 1996)
卷期:
Volume 19,
issue 4
页码: 429-438
ISSN:0253-3839
年代: 1996
DOI:10.1080/02533839.1996.9677806
出版商: Taylor & Francis Group
关键词: grid resolution;axisymmetric body
数据来源: Taylor
摘要:
An incompressible Reynolds‐averaged Navier‐Stokes (RANS) computational procedure is presented. Numerical computations using a three‐dimensional computer code with multigrid capability are made on two axisymmetric bodies at a Reynolds number (about 107) to investigate the effects of grid distribution and turbulence modeling on computed stern flows. Numerical‐experimental comparisons are presented for pressure and skin friction coefficients on the body, and axial velocity and turbulent shear stress profiles at two locations in the stern region. The root‐mean‐square (RMS) differences of the measured and computed flow variables are summarized. A grid‐independent numerical solution has been obtained from the present RANS computer code when the average value of y+1for the first grid center from the wall, has been less then 7, and the rate of covergence has been monitored to avoid the use of grid cells with excessively large aspect ratios. Two modifications of the Baldwin‐Lomax turbulence model have been shown to improve the predictions.
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