In PR #150, the typical advection based CFL condition for determining the time step on the fly was implemented for the periodic_turbulence case. However, the definition for get_adaptive_time_step() in flow_solver_case_base.cpp was not defined as the implementation is a bit more involved since one must consider the general case of having a non-uniform grid. For the implementation, we would need to find the minimum approximate_grid_spacing for a given dg->triangulation.
In PR #150, the typical advection based CFL condition for determining the time step on the fly was implemented for the
periodic_turbulencecase. However, the definition forget_adaptive_time_step()inflow_solver_case_base.cppwas not defined as the implementation is a bit more involved since one must consider the general case of having a non-uniform grid. For the implementation, we would need to find the minimumapproximate_grid_spacingfor a givendg->triangulation.