"you need some way to separate the heat transfer coefficients between air and radiator and water and radiator"
no
read more, post less
I characterize wbs without ever touching 'h'
and in the rad article (imperfect as it is by my standards of today) I did the same
while the equipment designer needs a 'value' for 'h', the applications engr does not
-> the (apparent) thermal resistance/impedance works just fine
and this is what I characterize
do (re)read that rad article, focusing on the methodology
and understand that the data illustrated with the graphs can be swapped around for different presentations/relationships
I could write 10 pages on the testing necessary to characterize 'h',
and then refer you to 10 books or so on CFD modeling so you could use 'h'
but none of this is relevant to the task at hand
"can't you just run replicates and analyze the data later to figure out an average and standard deviation for what you're trying to find?"
lol, with whose budget ?
the rad article took me 8 fu*king months, deduct at least half of that for my ignorance and its still 4 months
yea, I know all about 'replicates': 30hrs X 10 = 300hrs
-> and replicates are not the principal issue, it is the grid spacing and consistantly relating that to different sizes and types of rads
- validation will not occur by virtue of running replicates if the same 'error' is simply being repeated over and over
the 'right' software would help, I have now converted almost everything over to GIPB (IEEE 488) instruments
but LabVIEW costs $2000
donations ?
"Ambient temp really changes that much in your testing lab? If so, you can still measure delta-Ts to figure out what you're trying to do, but the fact you're trying to test a dynamic system does indeed make for a pain in the ass."
if you cannot maintain the inlet air temp when testing rads, you will chase your tail forever
Alchemy
you need a couple of years in an R&D lab to give you some perspective on that of which you blithely speak
then a year or two in mgmt making up budgets to pay for the data
simple little graphs can cost 10s of thousands of dollars
and may be worthless if the 'experimental design' was flawed
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