A comparison is made between the pressure distributions in identical brass and nylon pipe-lines conveying polystyrene powder, showing that electrostatic charging of the solid particles has a negligible effect on highspeed, gas-solids pipe flow.
A theory is presented for the prediction of the electrostatic charging rate of the solid particles. It is predicted and confirmed experimentally that the current to earth from electrically isolated sections of the brass pipe and from aluminium foil wrapped on a length of the nylon pipe varies linearly with the solids loading.
HignettE.Proc. Informal Conf. Dust Cooling, Queen Mary College, London19642, 1.
13.
SooS. L.TrezekG. J.I. and E.C. Fundamentals19643, 1.
14.
MobbsF. R.BowersH. M.RichesD. M.ColeB. N.‘Influence of particle size distribution on the high-speed flow of gas-solid suspensions in a pipe’, Paper 9 of this Symposium, p. 67.
15.
CulganJ. M. Ph.D. thesis, Georgia Inst. Tech., 1952.
