Reply To: Porta's Derivation of Lempor Theory

[Martin Johnson]

Stop press.
I have just found a mathematical error in my comparison of momentum and energy approaches. (Missed a divisor of 2 in one of the energy terms!).

What I now have is exact correlation between the momentum approach and the energy approach as set out by Porta. (Which he does hint at in his 1974 paper, but gives no proof.) At present this is limited to an analysis of a parallel chimney, since my aim was to investigate differences in approach, and tapered chimneys complicate matters dramatically.

So, it doesn’t matter which way you go, it comes to the same answer.

Martin
(One happy bunny)