Friction modification in a coupled system | Zendy

Peters L. K. | Zendy; Bender D. W. | Zendy; Klinzing G. E. | Zendy

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Friction modification in a coupled system

Author(s) -

Peters L. K.,

Bender D. W.,

Klinzing G. E.

Publication year - 1974

Publication title -

aiche journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.958

H-Index - 167

eISSN - 1547-5905

pISSN - 0001-1541

DOI - 10.1002/aic.690200405

Subject(s) - drag , silastic , turbulence , mechanics , tube (container) , glass tube , flow (mathematics) , reduction (mathematics) , parasitic drag , volumetric flow rate , materials science , chemistry , phase (matter) , thermodynamics , composite material , physics , geometry , mathematics , organic chemistry , medicine , endocrinology

Two‐phase solids‐in‐air flow was experimentally studied in a once through flexible wall tube flow system using nominal 25μm and 50μm spherical glass beads. For turbulent flow through the Silastic tube without a damping medium behind the wall, cases of true drag reduction and no drag reduction were found. The rate of addition of the glass beads was seen to be a correlatable parameter for both the flexible and rigid wall systems. A mechanistic model is proposed for interpretation of the results. It was qualitatively observed that the presence of an electrostatic charge on the particles at low relative humidities had a pronounced effect on increasing the drag in the system.

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