کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
503279 863756 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Impact of the floating-point precision and interpolation scheme on the results of DNS of turbulence by pseudo-spectral codes
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Impact of the floating-point precision and interpolation scheme on the results of DNS of turbulence by pseudo-spectral codes
چکیده انگلیسی

In this paper we investigate the impact of the floating-point precision and interpolation scheme on the results of direct numerical simulations (DNS) of turbulence by pseudo-spectral codes. Three different types of floating-point precision configurations show no differences in the statistical results. This implies that single precision computations allow for increased Reynolds numbers due to the reduced amount of memory needed. The interpolation scheme for obtaining velocity values at particle positions has a noticeable impact on the Lagrangian acceleration statistics. A tri-cubic scheme results in a slightly broader acceleration probability density function than a tri-linear scheme. Furthermore the scaling behavior obtained by the cubic interpolation scheme exhibits a tendency towards a slightly increased degree of intermittency compared to the linear one.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Physics Communications - Volume 177, Issue 7, 1 October 2007, Pages 560–565
نویسندگان
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