Experimental studies of friction and heat transfer in enhanced passages

Technical Report · Sun Mar 01 04:00:00 EST 1992

DOI:https://doi.org/10.2172/5568530· OSTI ID:5568530

Obot, N T; Esen, E B; Das, L

The objectives of this research are two-fold; one is to carry out an extensive experimental investigation of pressure drop and heat transfer for internally enhanced passages in laminar, transitional and turbulent flow. The laminar and transition regions have received very meager treatment in the past. In addition to the effects of Reynolds number and the geometric characteristics of the enhanced surfaces, a comprehensive investigation of the effect of fluid properties, which is usually expressed in terms of the Prandtl number, is one of the central features of this research program. The influence of Prandtl number on friction and heat transfer is undoubtedly the least understood because only a handful of studies considered more than one fluid. Also, there has been no consistent investigation of the Prandtl number effect for laminar or transitional flow. The second objective is to develop a general method that will aid data correlation and prediction which, in turn, will provide better understanding friction and heat transfer characteristics for smooth and enhanced passage. More specifically, the aim is to validate the frictional law of corresponding states using the present experimental data.

• Research Organization: Clarkson Univ., Potsdam, NY (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-89CE90029
• OSTI ID: 5568530
• Report Number(s): DOE/CE/90029-7; ON: DE92011607
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
DOCUMENT TYPES
ENERGY TRANSFER
FLUID FLOW
FRICTION
HEAT TRANSFER
LAMINAR FLOW
PRANDTL NUMBER
PRESSURE DROP
PROGRESS REPORT
REYNOLDS NUMBER
TRANSITION FLOW
TUBES
TURBULENT FLOW