  We study dynamics of a QGP fluid induced by energetic partons propagating
through it. We construct a (3+1)-dimensional QGP-fluid+Jet model. When a jet
traverses a uniform fluid, it induces a Mach cone structure of energy density
distribution and a vortex ring surrounding a path of the jet. When a pair of
jets travels through a radially expanding fluid, low momentum particles are
dominantly induced at large angles from the quenched jet. This result is
qualitatively consistent with observation of the CMS Collaboration at LHC.
