Fluid Flow and Heat Transfer in Curved Tubes with Temperature-Dependent Properties

2007 ◽  
Vol 46 (10) ◽  
pp. 3226-3236 ◽  
Author(s):  
Vimal Kumar ◽  
Pooja Gupta ◽  
K. D. P. Nigam
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Temperature Dependent ◽  
Flow And Heat Transfer ◽  
Temperature Dependent Properties

scholarly journals Perturbation Solutions for Hagen-Poiseuille Flow and Heat Transfer of Third-Grade Fluid with Temperature-Dependent Viscosities and Internal Heat Generation

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
B. Y. Ogunmola ◽  
A. T. Akinshilo ◽  
M. G. Sobamowo
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Heat Generation ◽  
Variable Viscosity ◽  
Internal Heat ◽  
Third Grade ◽  
Third Grade Fluid ◽  
Temperature Dependent ◽  
Flow And Heat Transfer ◽  
Grade Fluid

Regular perturbation technique is applied to analyze the fluid flow and heat transfer in a pipe containing third-grade fluid with temperature-dependent viscosities and heat generation under slip and no slip conditions. The obtained approximate solutions were used to investigate the effects of slip on the heat transfer characteristics of the laminar flow in a pipe under Reynolds’s and Vogel’s temperature-dependent viscosities. Also, the effects of parameters such as variable viscosity, non-Newtonian parameter, viscous dissipation, and pressure gradient at various values were established. The results of this work were compared with the numerical results found in literature and good agreements were established. The results can be used to advance the analysis and study of the behavior of third-grade fluid flow and steady state heat transfer processes such as those found in coal slurries, polymer solutions, textiles, ceramics, catalytic reactors, and oil recovery applications.

scholarly journals Numerical Investigation of Non-Newtonian Flow and Heat Transfer in Tubes of Heat Exchangers With Reciprocating Insert Devices

2010 ◽  
Author(s):  
D. S. Marti´nez ◽  
J. P. Solano ◽  
J. Pe´rez ◽  
A. Viedma
Keyword(s):  
Heat Transfer ◽  
Heat Exchangers ◽  
Tube Wall ◽  
Internal Diameter ◽  
Reciprocating Motion ◽  
Transfer Enhancement ◽  
Temperature Dependent ◽  
Newtonian Flow ◽  
Flow And Heat Transfer ◽  
Temperature Dependent Properties

Non-Newtonian flow and heat transfer in tubes of heat exchangers with reciprocating insert devices have been numerically investigated. The heat exchanger is mechanically assisted by a reciprocating cylinder, which moves the scraping rods inserted in the tubes. An array of semi-circular elements is mounted on each rod, with a pitch p = 5D. These elements fit the internal diameter of the tubes. During the reciprocating motion, they scrape the inner tube wall, avoiding fouling. Additionally, the movement of the inserted device generates macroscopic displacements of the flow, which continuously mix core regions with peripheral flow. A power law model with temperature dependent properties is implemented in FLUENT, for a Carboxymethil cellulose (CMC) solution in water with concentration of 2%. Flow pattern and pressure drop mechanisms are analyzed in static and dynamic conditions, and heat transfer enhancement features are discussed.

Sign in / Sign up

Export Citation Format

Share Document