Heating the intra-cluster medium by jet-inflated bubbles
  We examine the heating of the intra-cluster medium (ICM) of cooling flow
clusters of galaxies by jet-inflated bubbles and conclude that mixing of hot
bubble gas with the ICM is more important than turbulent heating and shock
heating. We use the PLUTO hydrodynamical code in full 3D to properly account
for the inflation of the bubbles and to the multiple vortices induced by the
jets and bubbles. The vortices mix some hot shocked jet gas with the ICM. For
the parameters used by us the mixing process accounts for about four times as
much heating as that by the kinetic energy in the ICM, namely, turbulence and
sound waves. We conclude that turbulent heating plays a smaller role than
mixing. Heating by shocks is even less efficient.
