Hi all,
I’m trying to model a ventilated roof cavity, completely unconditioned, with a few openings (but tbc where and how big etc). Right now I’m testing a few different infiltration rates to see how the cavity temperature changes. But I’d also like account for the internal convection coefficient, which will change as a function of the air movement. I’m trying out the ASTMC1340 algorithm which should be a function of air speed (among others), and I’m trying to figure out how to change this air speed.
Using add_str_ works when just change the algoritm, but when I try to change the air speed I get this error:
Any ideas?
Thanks