  A spherically symmetric collapsing scalar field model is discussed with a
dissipative fluid which includes a heat flux. This vastly general matter
distribution is analyzed at the expense of a high degree of symmetry in the
space-time, that of conformal flatness and self-similarity. Indeed collapsing
models terminating into a curvature singularity can be obtained. The formation
of black holes or the occurrence of naked singularities depends on the initial
collapsing profiles.
