کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7156013 1462641 2018 60 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Viscous flow simulations at high Reynolds numbers without wall functions: Is y+≃1 enough for the near-wall cells?
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
Viscous flow simulations at high Reynolds numbers without wall functions: Is y+≃1 enough for the near-wall cells?
چکیده انگلیسی
The results show that the numerical accuracy of the simulations is dependent on the selected turbulence model. For y+<1, there is no significant effect of the near-wall cell height on the numerical uncertainty of the selected flow quantities for the Spalart & Allmaras and k-kL models and so y+≃1 is sufficient to obtain numerical uncertainties of friction resistance coefficients smaller than 1% . On the other hand, with the SST k-ω model, y+≃1 leads to numerical uncertainties of friction resistance coefficients larger than 5% for all the present test cases. To attain the same uncertainty of the other turbulence models with the SST k-ω, one must use y+≃0.1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Fluids - Volume 170, 15 July 2018, Pages 157-175
نویسندگان
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