  We reproduce patterns of drying paste by means of smoothed particle
hydrodynamics which is the one of methods for solving the equations of
continuum in the Lagrangian description. In addition to reproduce a realistic
pattern, we find that average size of fragments decays in proportion to inverse
time in the case of a linear drying process. Distributions of the size of the
fragments are obtained depending on the time. We find a universal scaling
distribution by scaling analysis with the average size of the fragment.
