کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7055670 1458044 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A comparative study on the lattice Boltzmann models for predicting effective diffusivity of porous media
ترجمه فارسی عنوان
یک مطالعه مقایسه ای در مدل های مدل های بولتزمن برای پیش بینی انتشار موثر رسانه های متخلخل
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
In this paper, we present a comparative study on the popular single-relaxation-time lattice Boltzmann (LB) model (also called BGK model) and multiple-relaxation-time (MRT) LB model for calculating effective diffusivity of porous media with non-permeable inclusions. Through performing some simulations of the diffusion in simple porous media composed of cylinders in a square or staggered arrangement, we find that the predicted effective diffusivity based on the BGK model is dependent on the relaxation parameter, which is an artificial result in the framework of LB method. In the MRT model, however, this artificial result inherent in the BGK model can be eliminated through tuning one of the free relaxation parameters. The results in this work also demonstrate that the MRT model is more suitable than the BGK model in the study of diffusion in porous media and prediction of effective diffusivity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 98, July 2016, Pages 687-696
نویسندگان
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