Modeling, Simulation and Experimental Verification of the Break-Up of Liquid Jets and the Drop Formation in the Centrifugal Field A physical mathematical model for the description of the break-up of a liquid jet and the drop formation in the centrifugal field is presented taking the surrounding gaseous phase and the liquid viscosity into account. The model is based on perturbation theory, thus, the motion is decomposed into the time steady motion of the jet and the transient motion of the oscillation of the liquid gas interphase. The resulting drop size is in good accordance with the experimental data. The break-up length serves as a boundary condition and is based on experimental data.