[harly]

Hi,

I want to define a variable which consists of U_ and k_ two variables, for which the .oldTime()- scheme is working.

I want to stick my new variable into the ddt function, therefore the new variable should have this abilities too.

Where and How would I define such an variable ?

basically I want to define:

var = 0.5*magSqr(U_)+k_

and later I need

ddt(var)

in the kEpsilon.C

any thoughts?

thanks
-harly