Relation between ion mobility and fluid motion in dielectric liquids

Effect of injected charge on the electrification of oil flowing past the surface of composite polymers

“…At low temperatures, during the negative half cycles higher electron emission occurs on the wire surface which makes the streaming current negative. In addition, the negative ion mobility is higher than for positive ions at low fields [24]. However, the increase in the applied AC field leads to higher positive ion mobility and hence the streaming current becomes positive, especially at higher temperature (reduction in oil viscosity).…”