Ostwald ripening kinetics in a magnetic fluid made metastable by a strengthening of an external magnetic field

Ostwald ripening kinetics in a metastable magnetic fluid has been studied t heoretically under the condition when the highly elongated ellipsoidal shap e of the new phase elements stretched along the external magnetic field dir ection is taken into account. The self-similar solutions have been obtained for the time evolution of a supersaturation [similar to t(-1/3)(ln t)(5/18 )], of a critical and a mean droplike aggregate volume [similar to t(7/6)(l n t)(-2/3)], of an aggregate concentration [(ln t)(2/3)t(-7/6)]. An aggrega te distribution density has been found as a function of the aggregate size and of the critical aggregate size. [S1063-651X(98)11311-9].