This study is concerned with flow reversal phenomenon of fully developed combined convection in a vertical rectangular duct with unequally isothermal walls. Analytical solutions of temperature and velocity distributions are carried out. And based on the obtained solutions, the occurrence of reversed flow can be further examined. Results show that as the value of Rey/Gr is lower than a critical value, flow reversal adjacent to the relatively colder walls is possible to exist. This critical value is found to be a funtion of the aspect ratio of the cross section. The influence of physical parameters on flow pattern is investigated, and consequently reversed flow zone in terms of Rey/Gr and the aspect ratio is presented.
|Number of pages||14|
|Journal||International Communications in Heat and Mass Transfer|
|Publication status||Published - 1991 Jan 1|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Chemical Engineering(all)
- Condensed Matter Physics