DOI: 10.1615/ICHMT.2014.IntSympConvHeatMassTransf
ISBN Print: 978-1-56700-356-7
ISSN Online: 2642-3499
ISSN Flash Drive: 2642-3502
STUDY OF THE EFFECTS OF CONDUCTION IN THE WALL ON THE SINGLE-PHASE FORCED CONVECTION IN MICROCHANNELS
ABSTRACT
The aim of this study is to simulate numerically the laminar flow of a Newtonian fluid in a two dimensional parallel plate microchannel subject to constant wall heat flux (H2) and constant wall temperature (T) thermal boundary conditions. The combined effects of the axial conduction fluid/wall, the simultaneous development of the thermal and hydrodynamic boundary layers and viscous dissipation are taking into account. The finite volume method is used for solving the no dimensional conservation equations in a home code. The results are provided for water as fluid and for different thermal conductivity ratio K = ksolid/kfluid , wall thickness to channel width ratio E, and viscous dissipation Brinkman number. They show a deviation from the classical results of Nusselt number evolution at the entrance and in the fully developed region. A new correlation for the local Nusselt number taken into account the effect of the plate thickness and conductivity is proposed.