The viscosity of suspensions Einstein showed that single particles increased the viscosity of a liquid (h)as a simple function of their phase volume (f), h=h,1+2.5f) There is no effect of particle size,nor of particle position. because the theory neglects the effects of other particles. This equation works for f<10%The viscosity of suspensions Einstein showed that single particles increased the viscosity of a liquid (h s) as a simple function of their phase volume (f ), h = h s(1+ 2.5f ) There is no effect of particle size, nor of particle position, because the theory neglects the effects of other particles. This equation works forf < 10%