yes, I find the convection transfer from the outer surface of the pipe to be huge compared to the little conduction at the tee area(element). The dead water area freezes unless the dead leg length is very short. The 5' is too long, even with 2" insulation, this will need to traced.
It was hard...
Thanks Chicopee, I did set my initial model up that way but I didn't want to ignore convection heat loss thru the wall along the length. I used the "stepped" temperature found in the 1st step for calculating the convection loss for each element. This will be close and I might iterate a few times...
Wondering if anyone has modelled this common heat transfer problem? Basically it is a Dead Zone at the end of a pipe run, as shown,
Pipe run & branch is say, 20" pipe, 35C water flows from A thru the pipe branch C and all is good on those runs, flow is continuous and assume stays at 35C.
The...
