INVESTIGATION OF THE RELATION BETWEEN TURBULENT FLUID FLOW AND LOCAL HEAT TRANSFER IN FIN-AND-TUBE HEAT EXCHANGERS

Equipment ◽  
2006 ◽  
Author(s):  
U. Ahrend ◽  
M. Buchholz ◽  
R. Schmidt ◽  
J. Koehler
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Heat Exchangers ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Turbulent Fluid Flow ◽  
Turbulent Fluid

Predicting the Drag of Rough Surfaces

2021 ◽  
Vol 53 (1) ◽  
pp. 439-471
Author(s):  
Daniel Chung ◽  
Nicholas Hutchins ◽  
Michael P. Schultz ◽  
Karen A. Flack
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Incompressible Flow ◽  
Rough Surfaces ◽  
Full Scale ◽  
Rough Wall ◽  
Turbulent Fluid Flow ◽  
Turbulent Fluid

Reliable full-scale prediction of drag due to rough wall-bounded turbulent fluid flow remains a challenge. Currently, the uncertainty is at least 10%, with consequences, for example, on energy and transport applications exceeding billions of dollars per year. The crux of the difficulty is the large number of relevant roughness topographies and the high cost of testing each topography, but computational and experimental advances in the last decade or so have been lowering these barriers. In light of these advances, here we review the underpinnings and limits of relationships between roughness topography and drag behavior, focusing on canonical and fully turbulent incompressible flow over rigid roughness. These advances are beginning to spill over into multiphysical areas of roughness, such as heat transfer, and promise broad increases in predictive reliability.

Sign in / Sign up

Export Citation Format

Share Document