Basic question about 'convect'

Hi all,

I simply need to know if I’m using the convect function in the correct way. Is the following correct:

where ‘n-1’ denotes the result at the previous timestep.

Many thanks.

My understanding is

\frac{Du}{Dt} \approx \frac{1}{\Delta t}[u^{n+1} - convect(u^n,-\Delta t, u^n)]

Ah, of course, I forgot the minus sign on dt. Thanks for taking the time to answer!