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Title: Effect of geometry on flow structure and pressure drop in pneumatic conveying of solids along horizontal ducts
Authors: Laín, S
Sommerfeld, M
Keywords: Gas-solid flow;Inter-particle collisions;Pneumatic conveying;Turbulence;Wall roughness
Issue Date: Feb-2011
Publisher: NISCAIR-CSIR, India
Abstract: This study presents further developments in Euler/Lagrange approach to calculate confined particle-laden flows in pneumatic conveying lines. Special emphasis is placed on influence of particle-wall collisions and wall roughness as well as inter particle collisions with possible agglomeration on developing two-phase flow structure and resulting process parameters. Model sand numerical method were validated based on pressure drop measured along a 6 m horizontal channel, and agreement was found to be excellent for different particles sizes, mass loading and wall roughness. In a horizontal pipe flow, due to wall roughness induced focussing of particle trajectories towards the core of pipe, a secondary flow in pipe cross-section develops. Additional pressure drop due to particles in pipe flow was higher than that in channel due to different wall collision behaviour.
Page(s): 129-134
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Appears in Collections:JSIR Vol.70(02) [February 2011]

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