Conjugate heat transfer in thermally developing laminar flow with viscous dissipation effects

2009 ◽  
Vol 45 (9) ◽  
pp. 1199-1203 ◽  
Author(s):  
Mehmet Emin Arici ◽  
Orhan Aydin
Keyword(s):  
Heat Transfer ◽  
Laminar Flow ◽  
Viscous Dissipation ◽  
Conjugate Heat Transfer

scholarly journals 3D Numerical Simulation of Laminar Flow and Conjugate Heat Transfer through Fabric

2017 ◽  
Vol 17 (1) ◽  
pp. 53-60 ◽  
Author(s):  
Guocheng Zhu ◽  
Dana Kremenakova ◽  
Yan Wang ◽  
Jiri Militky ◽  
Rajesh Mishra ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Laminar Flow ◽  
Transfer Coefficient ◽  
Heat Loss ◽  
Human Skin ◽  
Human Body ◽  
Conjugate Heat Transfer ◽  
Air Flow ◽  
The Heat Transfer Coefficient

AbstractThe air flow and conjugate heat transfer through the fabric was investigated numerically. The objective of this paper is to study the thermal insulation of fabrics under heat convection or the heat loss of human body under different conditions (fabric structure and contact conditions between the human skin and the fabric). The numerical simulations were performed in laminar flow regime at constant skin temperature (310 K) and constant air flow temperature (273 K) at a speed of 5 m/s. Some important parameters such as heat flux through the fabrics, heat transfer coefficient, and Nusselt number were evaluated. The results showed that the heat loss from human body (the heat transfer coefficient) was smallest or the thermal insulation of fabric was highest when the fabric had no pores and no contact with the human skin, the heat loss from human body (the heat transfer coefficient) was highest when the fabric had pores and the air flow penetrated through the fabric.

Viscous Dissipation and Variable Properties Effect on Two Dimensional Conjugate Heat Transfer of Nanofluids in Microchannels

2011 ◽  
Author(s):  
A. Ramiar ◽  
A. A. Ranjbar
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Nusselt Number ◽  
Viscous Dissipation ◽  
Conjugate Heat Transfer ◽  
Energy Equation ◽  
Critical Reynolds Number ◽  
Two Dimensional ◽  
Variable Properties ◽  
Enhance Heat Transfer

Laminar two dimensional forced convective heat transfer of Al2O3–water nanofluid in a horizontal microchannel has been studied numerically, considering axial conduction, viscous dissipation and variable properties effects. The existing criteria in the literature for considering viscous dissipation in energy equation are compared for different cases and the most proper one is applied for the rest of the paper. The results showed that nanoparticles enhance heat transfer characteristics of the channel and inversely, viscous dissipation causes the Nusselt number and friction factor to decrease. The viscous dissipation effect may be emphasized by increasing Reynolds number and decreased by raising the exerted heat flux. Also, it was found that there is a critical Reynolds number below which the average Nusselt number of the nanofluid changes abnormally with Reynolds number as a result of variable properties effect.

The conjugate heat transfer from an internal heated small strip in a forced laminar flow

2001 ◽  
Vol 37 (4-5) ◽  
pp. 485-491 ◽  
Author(s):  
O. Bautista ◽  
F. Méndez ◽  
C. Treviño
Keyword(s):  
Heat Transfer ◽  
Laminar Flow ◽  
Conjugate Heat Transfer
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