  We investigate the role of the effective range on the bulk viscosity of $s$-
and $p$-wave Fermi gases. At resonance, the presence of the effective range
breaks the scale invariance of the system, and hence results in a non-zero bulk
viscosity. However, we show that the effective range plays a very different
role in the two cases. In the $s$-wave case, the role of the effective range is
perturbative, and its contribution to the bulk viscosity vanishes in the limit
of zero effective range. On the other hand, the effective range in $p$-wave
Fermi gases leads to a non-zero bulk viscosity, even in the zero-range limit.
We setup the general diagrammatic approach to compute the bulk viscosity
spectral function that includes the effects of the effective range. We then
compute the analytic expressions for the spectral function in the high
temperature limit, at low- and high-frequencies. We also derive the sum rules
for the bulk viscosity spectral function for both $s$- and $p$-wave gases.

Quantum Gases