The asymptotic behaviour of laminar forced convection in a circular duct, for a Herschel-Bulkley fluid with constant properties, is analysed by taking into account the viscous dissipation effects. The axial heat condu...The asymptotic behaviour of laminar forced convection in a circular duct, for a Herschel-Bulkley fluid with constant properties, is analysed by taking into account the viscous dissipation effects. The axial heat conduction in the fluid is neglected. The asymptotic temperature field and the asymptotic value of the Nusselt number are determined for every boundary condition that allows a fully developed region. Comparisons with other existing solutions for Newtonian and non-Newtonian cases are presented.展开更多
Physical and mathematical models are developed to describe the forced convection condensation heattransfer of saturated vapor flowing axially outside a horizontal tube. The numerical solution of themodels indicates th...Physical and mathematical models are developed to describe the forced convection condensation heattransfer of saturated vapor flowing axially outside a horizontal tube. The numerical solution of themodels indicates the effects of vapor velocity on the liquid film thickness. The result verifies the enhancement of condensation heat transfer caused by such flow.展开更多
文摘The asymptotic behaviour of laminar forced convection in a circular duct, for a Herschel-Bulkley fluid with constant properties, is analysed by taking into account the viscous dissipation effects. The axial heat conduction in the fluid is neglected. The asymptotic temperature field and the asymptotic value of the Nusselt number are determined for every boundary condition that allows a fully developed region. Comparisons with other existing solutions for Newtonian and non-Newtonian cases are presented.
文摘Physical and mathematical models are developed to describe the forced convection condensation heattransfer of saturated vapor flowing axially outside a horizontal tube. The numerical solution of themodels indicates the effects of vapor velocity on the liquid film thickness. The result verifies the enhancement of condensation heat transfer caused by such flow.
