  The deformation and dynamics of a single droplet in isotropic turbulence is
studied using a Lattice Boltzmann diffuse interface model involving exact
boundary flow conditions to allow for the creation of an external turbulent
flow. We focus on a small, sub-Kolmogorov droplet, whose scale is much smaller
than the Kolmogorov length scale of the turbulent flow. The external flow field
is obtained via pseudo-spectral simulation data describing the trajectory of a
passive tracer in isotropic turbulence. In this way we combine the microscopic
scale of the droplet and the macroscopic scale of the turbulent flow. The
results obtained from this fully resolved model are compared to previous
studies on sub-Kolmogorov droplet dynamics in isotropic turbulent flows, where
an analytical model, which assumes the droplet shape to be an ellipsoid at all
times, is used to describe the droplet deformation. Our findings confirm, that
the hybrid pseudo-spectral Lattice Boltzmann algorithm is able to study droplet
deformation and breakup in a regime well beyond the ellipsoidal approximation.
