Reply To: Avoiding spurious peak in residual convergence plot
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Dear Dr. Mathias
Thanks for your fast reply.
I was actually referring to the peak in the residual convergence plot at around
100,000 time steps (plot of residual error vs number of time steps) at the link. I compute the residual error as
energy1 - energy0)/energy1 where
sLattice.getStatistics().getAverageEnergy() computed at the current time step and previous time step respectively.
Though sudden peaks and troughs are possible in such residual convergence plots, the reason I call this as a “Spurious peak” is because I notice a typical change in the flow structure at a time instant around this peak only at high Reynolds numbers. This was not noticed at low Reynolds numbers.