  Despite the fundamentally different dissipation mechanisms, many laws and
phenomena of classical turbulence equivalently manifest in quantum turbulence.
The Reynolds law of dynamical similarity states that two objects of same
geometry across different length scales are hydrodynamically equivalent under
the same Reynolds number, leading to a universal drag coefficient law. In this
work we confirm the existence of a universal drag law in a superfluid wake,
facilitated by the nucleation of quantized vortices. We numerically study
superfluid flow across a range of Reynolds numbers for the paradigmatic
classical hard-wall and the Gaussian obstacle, popular in experimental quantum
hydrodynamics. In addition, we provide a feasible method for measuring
superfluid drag forces in an experimental environment using control volumes.
