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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Hettiarachchi, H. D. Madhawa Golubovic, Mihajlo William, M. Worek |
| Copyright Year | 2008 |
| Abstract | Slip-flow and heat transfer in rectangular microchannels are studied numerically for constant wall temperature (T) and constant wall heat flux (H2) boundary conditions under thermally developing flow. Navier-Stokes and energy equations with velocity slip and temperature jump at the boundary are solved using finite volume method in a three dimensional cartesian coordinate system. A modified convection-diffusion coefficient at the wall-fluid interface is defined to incorporate the temperature-jump boundary condition. Validity of the numerical simulation procedure is stabilized. The effect of rarefaction on heat transfer in the entrance region is analyzed in detail. The velocity slip has an increasing effect on the Nusselt (Nu) number whereas temperature jump has a decreasing effect, and the combined effect could result increase or decrease in the Nu number. For the range of parameters considered, there could be high as 15% increase or low as 50% decrease in fully developed Nu is plausible for T thermal boundary condition while it could be high as 20% or low as 35% for H2 thermal boundary condition. |
| Sponsorship | Nanotechnology Institute |
| Starting Page | 809 |
| Ending Page | 817 |
| Page Count | 9 |
| File Format | |
| ISBN | 0791842924 |
| DOI | 10.1115/MNHT2008-52358 |
| e-ISBN | 0791838137 |
| Volume Number | ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer, Parts A and B |
| Conference Proceedings | ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer |
| Language | English |
| Publisher Date | 2008-06-06 |
| Publisher Place | Tainan, Taiwan |
| Access Restriction | Subscribed |
| Subject Keyword | Slip flow Thermal boundary layers Entrance region Temperature Computer simulation Diffusion (physics) Flow (dynamics) Convection Finite volume methods Heat flux Microchannels Wall temperature Fluids Numerical analysis Boundary-value problems Heat transfer |
| Content Type | Text |
| Resource Type | Article |
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