Heat transfer and entropy production in the parallel plate flow of a power-law fluid with asymmetric convective cooling
M. López de Haro [1], S. Cuevas [2], A. Beltrán [3]

[1] Departamento de Fisica, Universidad de Extremadura, Av. de Elvas s/n, Badajoz 06071, Spain, on sabbatical leave from Centro de Investigacion en Energa, Universidad Nacional Autonoma de Mexico, A.P. 34, Temixco, Mor. 62580, Mexico [2] Centro de Investigacion en Energia, Universidad Nacional Autonoma de Mexico, A.P. 34, Temixco, Mor. 62580, Mexico, [3] Universidad Politecnica de Cataluna, Barcelona, Spain

Abstract: The heat transfer and entropy production in the parallel plate flow of a power-law fluid are analyzed. Asymmetric convective cooling is included in the analysis by considering thermal boundary conditions of the third kind. Peculiarities related to the temperature field for certain values of the power-law index, to our knowledge not reported so far, are pointed out. In cases where physical solutions of the temperature field are obtained, conditions for minimum entropy generation are determined. (*) M.L.H.: The work of MLH has been supported by the Ministerio de Educacion y Ciencia (Spain) through Grant No. FIS2007.60977 (partially financed by FEDER funds) and by the Junta de Extremadura through Grant No. GRU09038.