Calculation of the force of interaction of two drops in a plastic medium

In calculating the force of interaction of two spherical drops, the stress tensor component normal to the drop surface is taken from the solution of the corresponding problem of the elasticity theory, while the shear component is determined by the plastic properties of the medium. The results of the calculations performed are demonstrated to be in good agreement with experimental data on the character of drop motion and on the yield point of the medium surrounding the drops.