کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4994874 | 1458483 | 2017 | 50 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Analysis of time integration methods for the compressible two-fluid model for pipe flow simulations
ترجمه فارسی عنوان
تجزیه و تحلیل روش های تلفیق زمان برای مدل دوام مایع فشرده برای شبیه سازی جریان لوله
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
The strong performance of BDF2 is illustrated via several test cases related to the Kelvin-Helmholtz instability. A novel concept called Discrete Flow Pattern Map (DFPM) is introduced which describes the effective well-posed unstable flow regime as determined by the discretization method. Backward Euler introduces so much numerical diffusion that the theoretically well-posed unstable regime becomes numerically stable (at practical grid and timestep resolution). BDF2 accurately identifies the stability boundary, and reveals that in the nonlinear regime ill-posedness can occur when starting from well-posed unstable solutions. The well-posed unstable regime obtained in nonlinear simulations is therefore in practice much smaller than the theoretical one, which might severely limit the application of the two-fluid model for simulating the transition from stratified flow to slug flow. This should be taken very seriously into account when interpreting results from any slug-capturing simulations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Multiphase Flow - Volume 95, October 2017, Pages 155-174
Journal: International Journal of Multiphase Flow - Volume 95, October 2017, Pages 155-174
نویسندگان
Benjamin Sanderse, Ivar Eskerud Smith, Maurice H.W. Hendrix,