  In this conference proceeding, we investigate the physical anisotropy in
terms of the temporal and spatial lattice spacings in relation to the bare
parameters of SU(2) pure gauge theory using Wilson gradient flow. Anisotropic
lattices have a wide range of applications, from thermodynamic calculations in
QCD to very recent real-time simulations using the complex Langevin method. We
find an almost linear relationship between the bare and renormalized
anisotropy. Using a parametrization that includes nonlinear effects and was
earlier proposed for SU(3) theory, we obtain a good description of the coupling
dependence of the anisotropy with only two fitting parameters. Our observation
of an approximately linear relationship and this parametrization should
strongly reduce the computational effort of anisotropic lattice calculations in
the future.
