Role of moving horizontal walls on entropy generation during mixed convection within entrapped triangular cavities. (July 2017)

• Record Type: Journal Article
• Authors: Roy, Monisha; Roy, S.; Basak, Tanmay
• Is Part Of: International communications in heat and mass transfer. Volume 85(2017)
• Page Start: 92
• Page End: 99
• Publication Date: 2017-07
• Subjects: Entropy generation -- Entrapped triangular cavities -- Mixed convection -- Thermal efficiency -- Nusselt number; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Heat -- Transmission; Mass transfer; Periodicals; 621.4022
• DOI: 10.1016/j.icheatmasstransfer.2017.04.011
• Languages: English
• ISSNs: 0735-1933

Abstract

Abstract: A comprehensive analysis based on the irreversibilities associated with the energy flow and entropy generation is highly essential for the optimization of thermal systems. Entropy generation during mixed convection process has been studied in entrapped triangular cavities for moving horizontal walls involving isothermally hot inclined walls and cold horizontal walls (case 1) or isothermally cold inclined walls and hot horizontal walls (case 2). Overall it is found that, Re = 100 may be preferred over Re → 0, Re = 1 and Re = 10 at Pr = 0.026 and 7.2, Gr = 10 3 − 10 5 within the cavities, irrespective of the cases. In addition to Re = 100, Re = 10 may be optimal for the upper cavity with case 1 and lower cavity with case 2 at Gr ≈ 10 5 (higher Gr regime) and Pr = 7.2 based on moderate heat transfer rates.