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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Conte´, Ibrahima Peng, Xiao-Feng Yang, Zhen |
| Copyright Year | 2007 |
| Abstract | Investigations are done to numerically study forced convective heat transfer from the flow inside a rectangular coiled pipe, as micro-scale heat exchange device with staggered arrangement, to the external flow around the pipe. The commercial CFD software Fluent 6.0 is used as the solver. The problems considered were three-dimensional laminar flow of the refrigerant R141B through the tube and turbulent air flow exterior to the tube. The studied coiled pipe was composed of four rows among which two rows were encompassed in a large rectangular coil and the other two were in an inner smaller rectangular coil. The results showed remarkable differences in the flow behavior and heat transfer for different rows of tubes. The secondary flow in the tubes bends of the larger rectangular coil is very weak compared to that of the inner rectangular coil. Better heat transfer process occurred through the tubes of the second row where the higher values of the fluid temperatures were observed in the pipe. The results showed the effects of the straight tubes inclination angle on the flow behavior in rectangular coiled pipes. The shape of the secondary flow is changed from a couple of vortices in the case of smaller angle (α = 9°) to a single vortex in the case of larger angle (α = 45°). The results also showed the rotation of the maximum axial velocity due to the increase in the straight tubes inclination angles. The results are in good agreement with previous numerical and experimental works on laminar flow in helical coil pipe. |
| Sponsorship | Nanotechnology Institute |
| Starting Page | 789 |
| Ending Page | 794 |
| Page Count | 6 |
| File Format | |
| ISBN | 0791842657 |
| DOI | 10.1115/MNC2007-21136 |
| e-ISBN | 0791837947 |
| Volume Number | First International Conference on Integration and Commercialization of Micro and Nanosystems, Parts A and B |
| Conference Proceedings | 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems |
| Language | English |
| Publisher Date | 2007-01-10 |
| Publisher Place | Sanya, Hainan, China |
| Access Restriction | Subscribed |
| Subject Keyword | Forced convection Temperature Turbulence Computational fluid dynamics Computer software Microscale devices Flow (dynamics) Rotation Convection Air flow Fluids Heat Laminar flow Vortices Shapes Pipes Heat transfer Refrigerants |
| Content Type | Text |
| Resource Type | Article |
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