Transient conjugated heat transfer in channel flows with convection from the ambient

✍ Scribed by Wei-Mon Yan

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 667 KB
• Volume: 36
• Category: Article
• ISSN: 0017-9310
• DOI: 10.1016/s0017-9310(05)80098-5

✦ Synopsis

This

study presents a numerical solution of the transient conjugated heat transfer in a channel flow with convection from the ambient. The solution takes wall conduction and heat capacity effects into consideration. The effects of wall-to-fluid conductivity ratio K, the dimensionless wall thickness /J, the wallto-fluid thermal diffusivity ratio A and the outside Nusselt number Nu,, on the interfacial heat flux, interracial and bulk temperatures are discussed in detail. Results show that wall effect plays a significant role in the transient conjugated heat transfer problem. Particularly, the wall-to-fluid thermal ditTusivity ratio A has a decisive effect with regard to the speed of propagation of thermal energy from the wall-fluid interface to the outer surface of the channel. In addition, the time required for heat transfer to reach the steady state condition is longer for systems with larger K and fi or smaller A and NII,.