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
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
نویسندگان
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