  A gravity-scalar model in 5-dim. Riemann space is adjusted to the
thermodynamics of SU(3) gauge field theory in the temperature range 1 - 10
$T/T_c$ to calculate holographically the bulk viscosity in 4-dim. Minkowski
space. Various settings are compared, and it is argued that, upon an adjustment
of the scalar potential to reproduce exactly the lattice data within a
restricted temperature interval above $T_c$, rather robust values of the bulk
viscosity to entropy density ratio are obtained.
