Numerical studies of heat transfer enhancement by cross-cut flow control in wavy fin heat exchangers
| Autor: | Gwang Hoon Rhee, Hyun Muk Lim, Gun Woo Kim |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Fluid Flow and Transfer Processes
Materials science Internal flow 020209 energy Mechanical Engineering Heat transfer enhancement Enhanced heat transfer Thermodynamics Laminar flow 02 engineering and technology Heat transfer coefficient Mechanics 021001 nanoscience & nanotechnology Condensed Matter Physics Annular fin Physics::Fluid Dynamics Heat transfer 0202 electrical engineering electronic engineering information engineering Micro heat exchanger 0210 nano-technology |
| Zdroj: | International Journal of Heat and Mass Transfer. 96:110-117 |
| ISSN: | 0017-9310 |
| Popis: | Heat transfer enhancement by cross-cut induced flow control in a wavy fin heat exchanger was studied numerically. The concept of cross-cut is cutting fin in a direction perpendicular to the flow direction. A two-dimensional five-waved wavy fin with corrugation angle 20° was used as the geometry for simulation and the cross-cut was applied at the 3rd wave only. The simulation was performed using non dimensional governing equations for a steady laminar flow. The parametric study was conducted to find the optimum position and length of the cross-cut. The results showed that the heat transfer performance of optimized cross-cut wavy fin was enhanced by a maximum of 23.81% greater than a typical wavy fin. The pressure drop also increased by a maximum 7.04% in optimized case. Generally, the heat transfer performance of cross-cut applied plain fin has an enhanced heat transfer performance because of the thermal boundary layer disturbance and block of longitudinal heat transfer. In the case of the cross-cut applied wavy fin, additional heat transfer enhancement can be found because the cross-cut induced flow control makes a relatively low temperature fluid at the middle of internal flow attached to the fin wall after the cross-cut region. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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