  The effect of density dependent symmetry energy on elliptical flow is studied
using isospin-dependent quantum molecular dynamics model(IQMD). We have used
the reduced isospin- dependent cross-section with hard(H) equation of state to
study the sensitivity of elliptical flow towards symmetry energy in the energy
range of 50 - 1000 MeV/nucleon. The elliptical flow becomes zero at a
particular energy termed as transition energy. A systematic effort has been
made to pin down the transition energy for the density dependent symmetry
energy.
