Hi, I'm solving an Euler CFD code using the Lax-Wendroff method. It contains a dissipative smoothing term which i'm looking to minimise to optimise the accuracy. The timestep and smoothing terms are uncoupled, however different stable time steps result in different accuracy once the calculation has converged when the smoothing factor is constant. This doesn't make sense in my mind.. I understand why it would converge slower with a lower stable timestep, but how is the accuracy lower as well (i.e. the effects of smoothing is more pronounced) Thanks for any help as I cant get my head around it.