Abstract
The strength of an idealised model of a floc has been examined with a view to calculating the effect of hydrodynamic forces on floc stability. Various spatial arrangements of spherical primary particles were considered joined by elastic polymer links, in accordance with the accepted bridging mechanisms of flocculation. An available structural frame analysis computer program was used to find the forces in the links as the flocs were considered stressed by simple shear fields. For a given shape of floc a dependence of maximum stable size on the shear gradient was established. There is general agreement with published experimental findings of the variation of the maximum size of an aggregate for a given shear gradient.
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