کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5011726 | 1462657 | 2017 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Verification and validation of a high-order strand grid method for two-dimensional turbulent flows
ترجمه فارسی عنوان
تأیید و اعتبار یک شبکه رشته ای بالا برای جریان های آشفته دو بعدی
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کلمات کلیدی
شبکه های رشته، روش های مرتب بالا، مدلسازی آشفتگی، اصلاح شارژ، جمع بندی توسط قطعات،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مکانیک محاسباتی
چکیده انگلیسی
In this paper, we construct a novel hybrid of two one-dimensional schemes in order to leverage several advantages for solving two-dimensional turbulent flows. Building upon previous work by the authors and others, we combine one-dimensional flux correction along body surfaces along with high-order summation-by-parts finite differences normal to surfaces. A new semi-implicit multigrid solution method is presented that capitalizes on the unique directional properties of each scheme, utilizing an explicit multigrid scheme along the surface direction, and an implicit Gauss-Seidel scheme along the strand direction. Turbulence closure is achieved with a robust version of the Spalart-Allmaras turbulence model that accommodates negative values of the turbulence working variable. The hybrid scheme exhibits fourth-order convergence using the method of manufactured solutions. Fundamental validation studies of the turbulent flux correction method are conducted in two dimensions, using the NASA-Langley turbulence resource as a means for comparison. Results are presented that demonstrate improvements in accuracy with minimal computational and algorithmic overhead over traditional second-order algorithms.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Fluids - Volume 154, 1 September 2017, Pages 335-346
Journal: Computers & Fluids - Volume 154, 1 September 2017, Pages 335-346
نویسندگان
Oisin Tong, Aaron Katz, Yushi Yanagita, Dalon Work,