Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
Browse
2 results
Search Results
Article Citation - WoS: 5Citation - Scopus: 5Visualization of Heat Flow in a Vertical Channel With Fully Developed Mixed Convection(Elsevier Ltd., 2012) Çelik, Hasan; Mobedi, MoghtadaA study on visualization of heat flow in three channels with laminar fully developed mixed convection heat transfer is performed. The first channel is filled with completely pure fluid; the second one is completely filled with fluid saturated porous medium. A porous layer exists in the half of the third channel while another half is filled with pure fluid. The velocity, temperature and heat transport fields are obtained both by using analytical and numerical methods. Analytical expression for heat transport field is obtained and presented. The heatline patterns are plotted for different values of Gr/Re, thermal conductivity ratio, Peclet and Darcy numbers. It is found that the path of heat flow in the channel strongly depends on Peclet number. For low Peclet numbers (i.e., Pe = 0.01), the path of heat flow is independent of Gr/Re and Darcy numbers. However, for high Peclet numbers (i.e., Pe = 5), the ratio of Gr/Re, Darcy number and thermal conductivity ratio influence heatline patterns, considerably. For the channels with high Peclet number (i.e., Pe = 5), a downward heat flow is observed when a reverse flow exits. © 2012 Elsevier Ltd.Conference Object Mixed Convection Heat Transfer in a Partially Heated Parallel Plate Vertical Channel(Institute of Electrical and Electronics Engineers Inc., 2014) Çelik, Hasan; Mobedi, MoghtadaLaminar mixed convection heat transfer in a two dimensional symmetrically and partially heated vertical channel is investigated. The heated portions exist on the both walls of channel and their temperature is constant. The number of the heated portions is changed from 2 to 4 for each wall; however the total length of the heated portions is fixed. The fluid inlet velocity is uniform and air is taken as working fluid. The continuity, momentum and energy equations are solved numerically by using finite volume method. Results are compared with available studies in literature and good agreement is observed. The velocity and temperature fields are obtained for Gr / Re2= 0.0033 and 13.33. Based on the obtained temperature distributions, the change of local Nusselt number for different number of heated portions are obtained and plotted. The variation of the mean Nusselt number with the number of heated portions is also discussed. © 2014 IEEE.