The cooler than expected optical-UV transient PS1-10jh detected by the Pan-STARRS1 survey is probably related to a tidal disruption event in which a He-rich stellar core remnant is implied .
The evolution of bound debris during the disk phase is studied by solving the hydrodynamic equations .
The model provides a good fit either of the raising part of the light curve in the bands g _ { P 1 } , r _ { P 1 } , and i _ { P 1 } or in the early decay .
The parameters characterizing this optimized model are the mass of the central black hole , i.e. , 6.3 \times 10 ^ { 6 } M _ { \odot } and the critical Reynolds number { \cal R } = 10 ^ { 4 } that fixes the viscosity and the accretion timescale .
Such a high value of { \cal R } explains the low disk temperature and the consequent absence of X-ray emission .
The predicted bolometric peak luminosity is about 10 ^ { 45 } ergs ^ { -1 } and the predicted total radiated energy is about E _ { rad } = 2.67 \times 10 ^ { 51 } erg .