[rydol]

Dear all,

I'm standing in front of following problem during my transient simulation: I wanna define input temperature as an output temperature + some constant increment.

I have done something like this so far :

Defining a variable tout = outlet temperature + increment (400), then using that variable to define boundary conditions

(rp-var-define 'tout' float #f ((pick-a-real "rep/surface/area-weighted-avg 10, temperature n") + 400))
(ti-menu-load-string "define/boundary-conditions mass-flow-inlet inlet yes yes no 10 no tout no 0 no yes")


ofcourse this doesnt work, so I'm not sure if this approch is valid or if I'm just struggling with syntaxes.

I would appreciate any helpful comments.

[AlexanderZ]

(ti-menu-load-string "define/boundary-conditions mass-flow-inlet inlet yes yes no 10 no ~a no 0 no yes"(rpgetvar 'tout))

[rydol]

Dear Alexander,

thank you for your comment, I used your suggested modification as:

(rp-var-define 'tout' ((pick-a-real "rep/surface/area-weighted-avg outlet, temperature n") + 400))
(ti-menu-load-string "define/boundary-conditions mass-flow-inlet inlet yes yes no 68 no ~a no 0 no yes"(rpgetvar 'tout))

Nevertheless I'm still getting this error message:

Error: eval: unbound variable
Error Object: t

I guess the problem is in definition of variable tout, but I wasn't able to troubleshoot it, since the syntax of the scheme language remains mystery for me.

I would appreciate any help

[AlexanderZ]

(ti-menu-load-string (format #f "(define (make-new-rpvar name default type)(if (not (rp-var-object name))(rp-var-define name default type #f)))"))
(ti-menu-load-string (format #f "(make-new-rpvar 'tout 273.15 'real)"))
(rpsetvar 'tout (+ (pick-a-real "rep/surface/area-weighted-avg outlet () temperature no") 400))
(ti-menu-load-string (format #f "(define/boundary-conditions mass-flow-inlet inlet yes yes no 68 no ~a no 0 no yes" (rpgetvar 'tout))))

[rydol]

Dear Alexander,

Thanks a lot! It seems to be working, just had to delete some extra brackets in the last term.