This paper addresses the void fraction of polydisperse particles with a Weibull (or Rosin-Rammler) size distribution. It is demonstrated that the governing parameters of this distribution can be uniquely related to those of the lognormal distribution. Hence, an existing closed-form expression that predicts the void fraction of particles with a lognormal size distribution can be transformed into...

the purpose of this study is to identify parameters influence on the particle deposition within fin and tube heat exchanger of air-conditioning systems by cfd analysis. first the basic sketch of periodic geometry drawn and meshing operation including boundary conditions was performed. then the gas side properties and flow parameters were solved by ansys fluent 14.5 software. lagrangian equation...

The droplet size distribution (DSD) formed by gas-saturated oil jets is one of the most important characteristics flow to understand and model fate uncontrolled deep-sea spills. shape DSD, generally modeled as a theoretical lognormal, Rosin-Rammler or non-fundamental function, defines mass volume range droplets. Yet, fundamental DSD has received much less attention than median (d50) during ten ...

The evaluation of relaxation measurements is a well-established technique for predicting the lifetime polymer materials, with research primarily focusing on increasing prediction accuracy and minimizing material testing time. current study presents novel approach toward describing long-term behavior viscoelastic polymers based Maxwell model. It assumes mean time chains in conjunction dimensionl...

Abstract During the modeling of grinding systems, population balance (PBM) which considers a constant breakage rate has been widely used over past years. However, in some cases, PBM exhibited limitations, and time-dependent approaches have developed. Recently, non-linear framework traditional linear theory as partial case was introduced, thus allowing estimation product particle size distributi...

This study is aimed at detecting small faults in coal seams. With seams of different buried depths Luling Coal Mine, Yuenan and Sihe Mine with obvious difference hardness outburst hazards selected as the research objects, morphological characteristics a sample particle size such Rosin-Rammler distribution function, average size, cumulative mass distribution, mechanical parameters strength <math...

Six different particle size distribution (Gates–Gaudin–Schuhmann (GGS), Rosin–Rammler (RR), Lognormal, Normal, Gamma, and Swebrec) models were compared under metallurgical coke grinding conditions (ball time). Adjusted R2, Akaike information criterion (AIC), the root mean of square error (RMSE) employed as comparison criteria. Swebrec RR presented superior criteria with higher goodness-of-fit l...