More concentrated suspensions Higher order terms h=h(1+2.5f+6.2f2+0f3) or the Krieger and Dougherty equation 办值分8 where [h]is the intrisnic viscosity (2.5 for spheres) and fm is the maximum packing fractionMore concentrated suspensions Higher order terms : h = h s 1+ 2.5f + 6.2f 2 + O f 3 ( ( )) or the Krieger and Dougherty equation h = h s 1- f f m æ è ç ö ø ÷ - [h ]f m where [h ] is the intrisnic viscosity (2.5 for spheres) and f m is the maximum packing fraction