Proceedings of CONV-14: International Symposium on Convective Heat and Mass Transfer.
DOI: 10.1615/ICHMT.2014.IntSympConvHeatMassTransf
ISBN Print: 978-1-56700-356-7
ISSN Online: 2642-3499
ISSN Flash Drive: 2642-3502
CONJUGATE HEAT TRANSFER IN THE PREHEATING REGION OF PIPES FOR LAMINAR FLOWS WITH AXIAL HEAT CONDUCTION
pages 213-223
DOI: 10.1615/ICHMT.2014.IntSympConvHeatMassTransf.150
RESUMO
A theoretical treatment is presented of preheating effects due to wall and fluid heat conduction in forced convection heating of hydrodynamically developed laminar flows. The geometry of interest consists of a long circular tube heated for a finite, or semi-infinite length. The occurrence of full thermal development in the preheating region is demonstrated. An exact functional dependence between the asymptotic Nusselt number and two parameters, the Conduction Influence Parameter and the Péclet number, is finally derived and discussed.