An assessment of steady-state conditions in single slug horizontal pneumatic conveying  

作　　者：A.Lavrinec O.Orozovic H.Rajabnia K.Williams M.G.Jones G.E.Klinzing 

机构地区：[1]Centre for Bulk Solids and Particulate Technologies,The University of Newcastle,NSW 2308,Australia [2]Department of Chemical and Petroleum Engineering,The University of Pittsburgh,PA 15261,USA

出　　处：《Particuology》2021年第5期187-195,共9页颗粒学报（英文版）

基　　金：supported under Australian Research Council's Discovery Project funding scheme(No.DPI60101436).

摘　　要：This study used a 3D coupled CFD–DEM model to assess how slugs tend towards steady state in single slug horizontal pneumatic conveying.Initial slug length,inlet velocity and initial stationary layer fractions were systematically varied for a total of 72 simulations.Previously made observation that slugs tend towards a steady state was confirmed via a theoretical derivation.The derivation shows that slugs move towards their steady state lengths exponentially.This allowed for a calculation of a characteristic time scale which is a measure of how quickly a slug tends towards the steady state.The theoretical estimate which is a function of slug porosity,steady length,velocity and stationary layer fraction has good agreement with simulated results.A link between steady slug length and solids loading ratio was also shown.

关 键 词：Pneumatic conveying Dense phase Slug flow Steady state 

分 类 号：TQ022.11[化学工程]