viscoelastic effects on the entropy production in oscillatory flow between parallel plates with convective cooling粘弹性对熵产生的影响在平行板间振荡流对流冷却.pdfVIP

Entropy 2009, 11, 4-16; doi:10.3390/ OPEN ACCESS entropy ISSN 1099-4300 /journal/entropy Article Viscoelastic Effects on the Entropy Production in Oscillatory Flow between Parallel Plates with Convective Cooling ´ ´ Federico Vazquez , Miguel Angel Olivares-Robles and Sergio Cuevas Departamento de Fisica, Facultad de Ciencias, UAEM, Cuernavaca, Morelos, 62209, Mexico Seccion de Estudios de Posgrado e Investigacion, ESIME-Culhuacan, Instituto Politecnico Nacional, 04430, Mexico Departamento de Termociencias, Centro de Investigacion en Energia, Universidad Nacional Autonoma de Mexico, A. .P. 34, Temixco, Morelos 62580, Mexico E-mails: vazquez@buzon.uaem.mx; olivares67@; scg@cie.unam.mx Author to whom correspondence should be addressed. Received: 13 November 2008/ Accepted: 22 December 2008/ Published: 28 December 2008 Abstract: The heat transfer problem of a zero-mean oscillatory flow of a Maxwell fluid be- tween infinite parallel plates with boundary conditions of the third kind is considered. With these conditions, the amount of heat entering or leaving the system depends on the external temperature as well as on the convective heat transfer coefficient. The local and global time- averaged entropy production are computed, and the consequences of convective cooling of the plates are also assessed. It is found that the global entropy production is a minimum for certain suitable combination of the p