Navid C. Constantinou

This is very related with what's @jbisits been up to lately over in `PassiveTracerFlows.jl`, e.g., https://github.com/FourierFlows/PassiveTracerFlows.jl/pull/53

See https://fourierflows.github.io/PassiveTracerFlowsDocumentation/dev/literated/turbulent_advection-diffusion/

So @BrodiePearson this is great! The nice thing about this implementation compared to that done in https://github.com/FourierFlows/PassiveTracerFlows.jl/pull/53 is that here both tracers and flow are evolved simultaneously with the same...

Btw, as a side-note, we should add the expression of each term in the budgets in the doc strings so that people know what the functions are supposed to be...

or if you a bit run longer... 

@cesar-rocha, I remember you computing energy/enstrophy budgets. Did you notice anything like the above? As a remark, these are simulations of 2D Navier-Stokes with linear drag and hyperviscosity. There is...

With this last suggestion would x, y FFTs work nicely?

yes it's been coming to haunt us either way... (I remember a similar discussion some months ago...)

I should resurrect this..

What about https://github.com/mcabbott/Tullio.jl to the rescue? (just a random thought)