  We investigate the consequences of a nonzero bulk viscosity coefficient on
the transverse momentum spectra, azimuthal momentum anisotropy, and
multiplicity of charged hadrons produced in heavy ion collisions at LHC
energies. The agreement between a realistic 3D hybrid simulation and the
experimentally measured data considerably improves with the addition of a bulk
viscosity coefficient for strongly interacting matter. This paves the way for
an eventual quantitative determination of several QCD transport coefficients
from the experimental heavy ion and hadron-nucleus collision programs.
