Modeling of the centering force in a compound emulsion to make uniform plastic shells for laser fusion targets

In laser fusion experiment, fuel capsules with high sphericity and high wal l-thickness uniformity are often fabricated by the emulsion method. To unde rstand the process of forming the uniform wall by the emulsion method and t o further improve the thickness uniformity, we formulated a model to simula te the centering process of a water globule in a compound emulsion. We newl y added a thermodynamic force to the centering force in addition to previou s hydrodynamic forces. Our result indicates that nonuniform emulsion turns to be uniform by repeating instantaneous deformations followed with continu ous rotation around the horizontal axis.