@article{article_269973, title={INVESTIGATION OF FLUID FLOW AND HEAT TRANSFER IN A CHANNEL WITH AN OPEN CAVITY HEATED FROM BOTTOM SIDE}, journal={Mugla Journal of Science and Technology}, volume={2}, pages={55–59}, year={2016}, DOI={10.22531/muglajsci.269973}, author={Timuralp, Çisil and Altaç, Zekeriya}, keywords={Doğal taşınım,Zorlanmış Taşınım,Kombine taşınım,oyuk kanal,Laminer akış}, abstract={In this study, laminar flow of air (Pr=0.71) and combined forced convection through a horizontal square duct having side length H with a cavity height D and length W placed below the duct is investigated. While the bottom surface of the cavity is kept at a constant temperature, all the other cavity and duct walls are adiabatic. Air at constant temperature enters to the duct with constant velocity. The problem is modeled in three dimensions (3-D) and continuity, momentum and energy equations are solved using FLUENT® software where Boussinesq approximation is used for the density difference. In differencing the convection terms, second order upwind scheme and SIMPLE algorithm has been adapted. Width to height ratio of cavity is taken as W/D=0.5 and 1 while duct height to cavity height ratio H/D is kept within 0.5-2 interval. The Richardson number is varied between 0.1 to 10. The numerical simulations and the analysis were carried out for Reynolds number values of 10, 100 and 200. The average Nusselt number is computed over the hot bottom cavity surface area and the effects of the Richardson number, Reynolds number, W/D and H/D ratios on the flow and heat transfer are investigated. It is observed that as the cavity width is increased, rotating cells are observed with increasing the Richardson number while for increased Reynolds numbers forced convection effects became more pronounced.}, number={1}, publisher={Muğla Sıtkı Koçman Üniversitesi}