کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10345055 698146 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A fractional-step thermal lattice Boltzmann model for high Peclet number flow
ترجمه فارسی عنوان
مدل بولتزمن مدل حرارتی قطعه ای برای جریان شماره پکله بالا
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر علوم کامپیوتر (عمومی)
چکیده انگلیسی
As a promising approach in hydrodynamics and thermodynamics modeling, the lattice Boltzmann method (LBM) still suffers severe numerical instability when the temperature field of the flow is convection-dominant (high Peclet number). Despite a lot of research devoted to solve this problem worldwide, to simulate high Peclet number thermal flow at comparably few computational cost is still a hard work, making it inefficient in practical use. In this paper, we combine the LBM and the fractional-step method to propose a novel and stable thermal lattice Boltzmann scheme for high Peclet number flow without refining the lattice. By numerical tests of thermal Poiseuille flow and Couette flow, we quantify second-order accuracy of the proposed model, and through several cases of Peclet number from low to high, the superior stability and efficiency compared with existing thermal lattice Boltzmann model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Mathematics with Applications - Volume 70, Issue 5, September 2015, Pages 1152-1161
نویسندگان
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