کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
155337 456891 2013 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Application of periodic boundary conditions to CFD-DEM simulation of gas–solid flow in pneumatic conveying
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Application of periodic boundary conditions to CFD-DEM simulation of gas–solid flow in pneumatic conveying
چکیده انگلیسی

This paper presents a numerical study of horizontal pneumatic conveying by the combined approach of computational fluid dynamics (CFD) and discrete element method (DEM), with special reference to the use of periodic boundary condition (PBC) for computational efficiency. A new iterative method is proposed to generally control the solid flowrate simulated in a CFD-DEM model with PBC. The characteristics of the flows in the start-up section are analyzed in detail and compared with those in the well-developed flow section for different flow regimes. On this basis, two semi-theoretical correlations are formulated to respectively predict the start-up section length and the relation between particle number and solid flowrate. The applicability of PBC to the CFD-DEM modeling of pneumatic conveying, as well as the two correlations, is verified by comparing the measured and calculated results under different conditions.


► Horizontal pneumatic conveying is studied by CFD-DEM approach.
► Solid flowrate is controlled under periodic boundary conditions (PBC).
► A correlation is formulated to predict the start-up section length.
► Applicability of PBC and associated treatments is verified.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 93, 19 April 2013, Pages 214–228
نویسندگان
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