کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10356490 867793 2012 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spectral compact difference hybrid computation of passive scalar in isotropic turbulence
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
Spectral compact difference hybrid computation of passive scalar in isotropic turbulence
چکیده انگلیسی
An accurate and efficient hybrid numerical method is developed for direct numerical simulation of passive scalar in homogeneous turbulence for the Schmidt number 1 and 50. The hybrid method uses the standard Fourier spectral method for the incompressible Navier-Stokes equation and the combined compact difference scheme for the passive scalar transport equation. Accuracy of the method is carefully examined by comparing with the full spectral method regarding the spectra, probability density function, field structure of the passive scalar, and is found to be very satisfactory. The computational time for the hybrid method is decreased by 26% for the Schmidt number 1 when compared to the full spectral method, and by 77% for the Schmidt number 50 when the number of grid points for the velocity field is reduced under the scale separation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Computational Physics - Volume 231, Issue 21, 30 August 2012, Pages 7398-7414
نویسندگان
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