کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
667582 1458501 2015 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analyzing the effect of wall roughness on gas-particle flow in confined channels based on a virtual-wall-group concept
ترجمه فارسی عنوان
تجزیه و تحلیل اثر زبری دیواره بر جریان گاز ذرات در کانال های محدود بر اساس یک مفهوم گروه مجازی دیوار
کلمات کلیدی
زبری دیوار، کانال های جریان محدود گروه دیوار مجازی، ذرات تقسیم دیوار، شمارش چندگانه،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Present work aims to develop a particle history effect model for describing the effect of wall roughness on particle-wall collision in confined flow channels. To solve the real distribution function of roughness angle, the effective distribution function is scrutinized with a virtual testing method, and a further virtual-wall-group concept is proposed to investigate the effect of particle motion experience. It is found that roughness angle distribution should be described by a particle history effect-probability distribution function. Rebound angle is rebuilt according to the coordinate rotation operation. Multiple collisions are divided into two types, namely Type I induced by negative rebound and Type II led by positive rebound. Besides, a new probability function is derived to distinguish multiple collisions from a single collision. A set of modified algorithm for multi-collision is built and applied to simulate the particle-rough wall collision, and the predictions are evaluated by the measurements. It reveals that a typical peak can be seen in the probability distributions of both types of multiple collisions, and the effect of wall roughness decreases with the increase of impact angle. The simulated results of confined planar gas-particle flow are good in accordance with the measured data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Multiphase Flow - Volume 77, December 2015, Pages 158-170
نویسندگان
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