Numerical study of turbulent heat transfer and flow characteristics of hot flow over a sudden-expansion with base mass injection

2000 ◽  
Vol 144 (1-2) ◽  
pp. 57-69 ◽  
Author(s):  
Y. -J. Yang ◽  
Z. -S. Yan ◽  
C. -K. Chen
Keyword(s):  
Heat Transfer ◽  
Numerical Study ◽  
Flow Characteristics ◽  
Turbulent Heat Transfer ◽  
Sudden Expansion ◽  
Turbulent Heat ◽  
Mass Injection

A Numerical Study of Turbulent Heat Transfer in a Spherical Annulus

1988 ◽  
Vol 110 (4a) ◽  
pp. 870-876
Author(s):  
W. Stein ◽  
H. Brandt
Keyword(s):  
Heat Transfer ◽  
Turbulence Model ◽  
Numerical Study ◽  
Flow Characteristics ◽  
Local Heat Transfer ◽  
Turbulent Heat Transfer ◽  
Turbulent Heat ◽  
Total System ◽  
Navier Stokes Equation ◽  
Spherical Annulus

A numerical study of steady, buoyant, incompressible water flow and heat transfer through a spherical annulus has been made. A two-dimensional computer code based on the TEACH code was rewritten in spherical coordinates to model the Navier–Stokes equation and to model fluid turbulence with a k–ε turbulence model. Results are given for the total system Nusselt number, local heat transfer rate, and fluid flow characteristics for both buoyant and nonbuoyant laminar and turbulence modeled flow. Incorporating both the turbulence model and buoyancy into the calculations improves the results.

Determination of Flow Characteristics and Turbulent Heat Transfer in a Ribbed Roughened Square Duct, Part 2: Numerical Simulations

2011 ◽  
Vol 110-116 ◽  
pp. 2364-2369
Author(s):  
Amin Etminan ◽  
H. Jafarizadeh ◽  
M. Moosavi ◽  
K. Akramian
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Flow Characteristics ◽  
Turbulence Models ◽  
Turbulent Heat Transfer ◽  
Turbulent Heat ◽  
Square Duct ◽  
Optimized Model ◽  
Rsm Model

In the part 1 of this research, some useful turbulence models presented. In that part advantages of those turbulence models has been gathered. In the next, numerical details and procedure of solution are presented in details. By use of different turbulence models, it has been found that Spallart-Allmaras predicted the lowest value of heat transfer coefficient; in contrast, RSM1 has projected the more considerable results compared with other models; besides, it has been proven that the two-equation models prominently taken lesser time than RSM model. Eventually, the RNG2 model has been introduced as the optimized model of this research; moreover.

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