LAMINAR FLOW HEAT TRANSFER IN A HELICALLY-COILED TUBE

1974 ◽  
Author(s):  
Suman P. N. Singh ◽  
Kenneth J. Bell
Keyword(s):  
Heat Transfer ◽  
Laminar Flow ◽  
Coiled Tube ◽  
Helically Coiled Tube ◽  
Flow Heat

HEAT TRANSFER ENHANCEMENT IN A HELICALLY COILED TUBE WITH Al2O3/WATER NANOFLUID UNDER LAMINAR FLOW CONDITION

2012 ◽  
Vol 11 (05) ◽  
pp. 1250029 ◽  
Author(s):  
P. C. MUKESH KUMAR ◽  
J. KUMAR ◽  
S. SURESH ◽  
K. PRAVEEN BABU
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Laminar Flow ◽  
Transfer Coefficient ◽  
Flow Condition ◽  
Volume Concentration ◽  
Dean Number ◽  
Particle Volume ◽  
Coiled Tube ◽  
Helically Coiled Tube

In this experimental investigation, the heat transfer coefficients of a shell and helically coiled tube heat exchanger using Al2O3 /water nanofluid under laminar flow condition were studied. The Al2O3 nanoparticles were characterized by X-Ray diffraction (XRD). The Al2O3 /water nanofluid at 0.1%, 0.4% and 0.8% particle volume concentration were prepared by using two step method. The prepared nanofluid was characterized by scanning electron microscope (SEM). It is observed that the overall heat transfer coefficient, inner heat transfer coefficient and experimental inner Nusselt number increase while increasing particle volume concentration and increasing inner Dean number. The enhancement of overall heat transfer coefficient was found to be 7%, 16.9% and 24.2% at 0.1%, 0.4% and 0.8% Al2O3 /water nanofluid respectively when compared with water. The enhancement of tube side experimental Nusselt number was found to be 17%, 22.9% and 28% at 0.1%, 0.4% and 0.8% particle volume concentration of Al2O3 /water nanofluid respectively when compared with water at fixed Dean number. The tests were conducted in the range of 1600 < De < 2700, and 5200 < Re < 8600 under laminar flow condition and counter flow configuration. These enhancements are due to higher thermal conductivity of nanofluid while increasing particle volume concentration and Brownian motion of nanoparticles. It is studied that there is no negative impact on formation of secondary flow and mixing of fluid when nanofluid passes through the helically coiled tube.

Simulation of Electrohydrodynamic Enhancement of Laminar Flow Heat Transfer

1993 ◽  
Vol 1 (1) ◽  
pp. 115-126 ◽  
Author(s):  
George S. Dulikravich ◽  
Vineet Ahuja ◽  
Seungsoo Lee
Keyword(s):  
Heat Transfer ◽  
Laminar Flow ◽  
Flow Heat ◽  
Electrohydrodynamic Enhancement

Effect of secondary fluid motion on laminar flow heat transfer in helically coiled tubes

AIChE Journal ◽  
1971 ◽  
Vol 17 (5) ◽  
pp. 1114-1122 ◽  
Author(s):  
A. N. Dravid ◽  
K. A. Smith ◽  
E. W. Merrill ◽  
P. L. T. Brian
Keyword(s):  
Heat Transfer ◽  
Laminar Flow ◽  
Fluid Motion ◽  
Flow Heat ◽  
Secondary Fluid
Sign in / Sign up

Export Citation Format

Share Document