The paper describes a study of the charge transfer of a solid‐gas suspension in turbulent pipe flow. Using hollow glass spheres as the particulate phase, nitrogen and saturated air respectively as the gaseous phase, experiments were performed at flow rates of Reynolds number 5000–16000. Experimental results reveal that along a dielectric pipe there is strong electrification of the suspension, with particle electrification per pipe‐diameter displacement of the order of ‐ 10-5 C/kg, while along a conductor pipe the charge decay of the electrified suspension is of an empirical form (q/m)0 exp(-αl1/2), where l is the suspension displacement from the pipe entrance and α is a constant. In each case the pipe length was approximately 1 m, and the internal diameter approximately 1 cm. The process of charge transfer through particle‐pipe impact is discussed, and an experimental EGD generator setup is described.
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