DOI: 10.1615/THMT-18
ISBN Print: 978-1-56700-468-7
ISBN Online: 978-1-56700-467-0
ISSN Print: 2377-2816
Experimental study of thermal boundary layer in a dual cavity solar chimney
RÉSUMÉ
Experiments are performed to measure the instantaneous temperature within the natural convection boundary layer developing within a dual-cavity solar chimney. Mean profiles of statistics do not indicate an obvious scaling length that could characterise the thermal boundary layer completely. The root-mean-square profiles of fluctuating temperature suggests that a length-scale could be obtained based on the peak r.m.s. location. However such a length scale results in collapse of profiles only adjacent to the heated surface. Further investigation is necessary at sufficiently high Rayleigh numbers (O(1011)) in order to determine appropriate length-scales in different regions of thermal boundary layer analogous to the inner and outer regions of a high-Reynolds number momentum boundary layer.