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Effect of Dune Formation on Pressure Drop in Horizontal Pneumatic Conveying System

DSpace at IIT Bombay

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Title Effect of Dune Formation on Pressure Drop in Horizontal Pneumatic Conveying System
 
Creator MAKWANA, AB
PATANKAR, A
BOSE, M
 
Subject SUBAQUEOUS BARCHAN DUNES
CHANNEL FLOW
BEHAVIOR
shear stress
pneumatic conveying
dune
CFD
pressure drop
 
Description Pneumatic conveying is widely used in industries handling large amount of granular materials to transport the solid particles; however, the process is energy intensive as an instability of flow sets in the transportation line even in the dilute regime, causing large fluctuations in the line pressure drop, the reason of which is not clearly understood. Here, we investigate, both by experiments and by using numerical simulations, the instability transition regimes and identify the reasons of the fluctuations observed in the line pressure drop in a horizontal pneumatic transport system operating at near-saltation conditions. It is observed that the increase in the pressure drop (immediately after the saltation) is accompanied by the formation of distinct dunes. It is also observed that the line pressure drop depends on the axial location of the dune and shows large fluctuations in the regime where the dunes are unstable. Results obtained from the numerical simulations suggest that the increase in the line pressure drop in the presence of dunes is essentially due to the shear stresses at the dune surface which are larger than that for the flows in clean pipe.
 
Publisher TAYLOR & FRANCIS INC
 
Date 2016-01-15T08:00:07Z
2016-01-15T08:00:07Z
2015
 
Type Article
 
Identifier PARTICULATE SCIENCE AND TECHNOLOGY, 33(1SI)59-66
0272-6351
1548-0046
http://dx.doi.org/10.1080/02726351.2014.936541
http://dspace.library.iitb.ac.in/jspui/handle/100/18112
 
Language en