Heat transfer and fluid flow characteristics for an annulus of periodically varying cross section
Abstract
The fully developed laminar-flow and temperature fields of a double-pipe heat-exchanger with an annular duct of streamwise-periodic-varying cross-sectional area are investigated analytically for Reynolds numbers 50-1000 and Prandtl numbers 2-10. Numerical results are presented graphically and discussed. At Re 1000 and Pr 10, the Nusselt number is found to be four times that of a similar configuration with constant cross section; the pressure drop is increased by a factor of two. Nusselt numbers for two different boundary conditions (constant wall temperature or uniform wall heat flux) are shown to differ by only 10-15 percent.
- Publication:
-
Numerical Heat Transfer
- Pub Date:
- September 1984
- Bibcode:
- 1984NumHT...7..285P
- Keywords:
-
- Annular Flow;
- Heat Pipes;
- Pipe Flow;
- Tube Heat Exchangers;
- Computational Fluid Dynamics;
- Laminar Flow;
- Nusselt Number;
- Prandtl Number;
- Reynolds Number;
- Temperature Distribution;
- Fluid Mechanics and Heat Transfer