The only way to understand the dynamical phenomena of classical pulsating variable stars, such as the Blazhko effect, resonances, excitation of nonradial modes, and period doubling is the application of multidimensional hydrodynamical codes. The task is to learn how to use existing hydrodynamical codes, how to modify them, then apply them to model and investigate dynamical phenomena that have been discovered in space photometric and ground based data bases. The candidate will benefit from the expertise accumulated in the Institute during the past decades.