If one adds a constant cooling rate to Newton's Law of Cooling one gets a much better fit. There seems to be some other mechanism of cooling at work which may be the presence of some conduction.
Edit (3/16): Corrected the error in the value given for A. The old value was the A for a ΔT fit which is inconsistent with the formula shown.
Warning (3/16): Note that B can't remain constant for all time since one should get the ambient temperature when Δt=∞. The term above just shows something is missing from Newton's law. At best it is an empirical fit of the data.
No comments:
Post a Comment