This paper reports the effect of Reynolds number, mass loading, and particle shape and size on pressure drop in a vertical gas-solids pneumatic conveying line. We isolate the effect of one variable while holding all others constant. A commonly used pressure drop correlation and a state-of-the-art multiphase computational fluid dynamics (CFD) models are then assessed by comparing their predictions to experimental data. Deficiencies in the models and the correlation are identified, and possible modifications are proposed. The most notable deficiency is the inability of both the experimental correlation and the CFD model to accurately predict the pressure drop for gas-solids flow with highly aspherical particles.


Chemical and Biochemical Engineering


Dow Chemical Company
National Science Foundation (U.S.)/Integrative Graduate Education and Research Traineeship. Fellowship for Therapeutic and Diagnostic Devices
National Science Foundation (U.S.) Graduate Research Fellowship

Keywords and Phrases

Gas-Solids; Mass Loading; Particle Shape; Pressure Drop; Reynolds number

Document Type

Article - Journal

Document Version

Final Version

File Type





© 2005 American Chemical Society (ACS), All rights reserved.

Publication Date

01 Jan 2005