  First order quark hadron phase transition is considered in scaling
hydrodynamics including the Csernai-Kapusta model of nucleation of hadronic
bubbles leading to supercooling. The effect of viscosity on the entropy
production is studied in ideal as well as in viscous hydrodynamics with and
without supercooling. It is found that the excess entropy produced due to
supercooling depends weakly on viscosity.
