Vertical and Temporal Distributions of the Heat Conductivity and Flux

Open Access
Publisher Website
Google Scholar
Abstract
A numerical scheme was devised to solve the vertical heat diffusion equation for values of the coefficient, K, based solely upon temperatures measured on the 1420-ft Cedar Hill Tower. The computed values of K fall in the approximate range of 103 to 106 cm2 sec−1 and exhibit a diurnal variation of one-half to two orders of magnitude. The vertical distributions are quite variable in form during the day but tend to show a peak lying near or at the ground at night and several hundred meters above the ground during daylight hours. Flux values computed from the K values and temperature gradient for the most part were found to be of the order of 10−3 cal cm−2 sec−1. The almost consistent appearance of negative values of K at certain times of the day indicates periods when other influences dominate turbulent heat transfer. Abstract A numerical scheme was devised to solve the vertical heat diffusion equation for values of the coefficient, K, based solely upon temperatures measured on the 1420-ft Cedar Hill Tower. The computed values of K fall in the approximate range of 103 to 106 cm2 sec−1 and exhibit a diurnal variation of one-half to two orders of magnitude. The vertical distributions are quite variable in form during the day but tend to show a peak lying near or at the ground at night and several hundred meters above the ground during daylight hours. Flux values computed from the K values and temperature gradient for the most part were found to be of the order of 10−3 cal cm−2 sec−1. The almost consistent appearance of negative values of K at certain times of the day indicates periods when other influences dominate turbulent heat transfer.

This publication has 0 references indexed in Scilit: