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Journal of Applied Fluid Mechanics، جلد ۱۴، شماره ۵، صفحات ۱۵۶۷-۱۵۸۱
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عنوان انگلیسی Growth of Turbulent Boundary Layer with Varying Inlet ‎Length Scales‎
چکیده انگلیسی مقاله This study aims to generate a fully developed turbulent boundary layer in the channel domain using ‎LES (Large Eddy Simulation), suitable inflow conditions along with statistically reliable turbulent ‎characteristics are required. This study clarifies the effect of the integral length scale from the ‎existing data on the generation of turbulent boundary layers. In order to justify the work, an ‎artificially created boundary layer is imposed on the inlet section, which gradually evolves into a ‎fully developed turbulent boundary layer flow inside the numerical domain. In this study, the ‎synthetic inflow method, which is based on an exponential correlation function, is used by ‎imposing the spatial and temporal correlation between two different points on the inlet section. In ‎addition, we conducted parametric length scale studies on the inlet section and compare our results ‎with existing data. The results indicated that the cases of larger length scale in the span-wise ‎direction were not only effective in achieving the target shape of a fully developed turbulent ‎boundary layer, but also developed it faster than the smaller-length scales.‎
کلیدواژه‌های انگلیسی مقاله Statistical inflow data, Synthetic inflow generator, Integral length scale, Channel flow, Turbulent ‎boundary layer, CFD
نویسندگان مقاله Y. T. Lee |
School of Mechanical Engineering

H. C. Lim |
Pusan National University

نشانی اینترنتی https://www.jafmonline.net/article_1185_6c9bfc45bcd9bb0d9e09631ce37bb96f.pdf
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