Slip flow and heat transfer in axially moving micro-concentric cylinders

• Published in: International communications in heat and mass transfer Vol. 37; no. 8; pp. 1149 - 1152
• Main Authors: Khadrawi, A.F., Al-Shyyab, Ahmad
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.10.2010; Elsevier
• Subjects: Applied fluid mechanics; Applied sciences; Axially moving; Cylinders; Electronics; Exact sciences and technology; Fluid dynamics; Fluid flow; Fluidics; Fundamental areas of phenomenology (including applications); Heat transfer; Hydrodynamics; Mathematical analysis; Micro- and nanoelectromechanical devices (mems/nems); Micro-cylinder; Microchannel; Physics; Rarefied gas dynamics; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Slip; Slip flow; Slip flows; Slip velocity; Temperature jump; Thermal and hydrodynamic; Slip velocity; Temperature jump; Micro-cylinder; Microchannel; Thermal and hydrodynamic; Axially moving; Slip flow; Rarefied gas flow; Boundary conditions; Modelling; Coaxial cylinders; Microstructure; Microelectromechanical device; Microfluidics; Heat transfer
• ISSN: 0735-1933; 1879-0178
• DOI: 10.1016/j.icheatmasstransfer.2010.06.006

The hydrodynamics and thermal behaviors of fluid flow in axially moving micro-concentric cylinders are investigated analytically. Effects of Knudsen number, velocity and radius of the cylinders on the microchannel hydrodynamics and thermal behaviors are investigated. It is found that as Kn increases the slip in the hydrodynamic and thermal boundary condition increases. The slip and the jump at the inner surface are much larger than that of the outer one. When the outer cylinder velocity approaches the inner cylinder one, the slip velocity vanishes. Also, the effect of the variation of U 1 on the temperature jump for adiabatic outer surface is insignificant.