Re: Diffusion with TRT collision operator
when you do TRT for the advection diffusion equation, make sure that omegam is the omega, which is calculated from the diffusion coefficient, and omegap is calculated with the magic parameter. For more information see http://alexkuzmin.com/wp-content/uploads/2011/05/stat_stability.pdf
I hope this will help you fix the problem.
With best regards,