Experimental investigation of turbulent natural convection flow in a converging channel

2008 ◽  
Vol 32 (6) ◽  
pp. 1204-1212 ◽  
Author(s):  
T.F. Ayinde
Keyword(s):  
Experimental Investigation ◽  
Natural Convection ◽  
Convection Flow ◽  
Natural Convection Flow ◽  
Turbulent Natural Convection ◽  
Converging Channel

Turbulent Natural Convection Flow on a Heated Vertical Wall Immersed in a Stratified Atmosphere

1989 ◽  
Vol 111 (2) ◽  
pp. 378-384 ◽  
Author(s):  
A. K. Kulkarni ◽  
S. L. Chou
Keyword(s):  
Natural Convection ◽  
Numerical Solutions ◽  
Vertical Wall ◽  
Leading Edge ◽  
Transitional Flow ◽  
Convection Flow ◽  
Ambient Atmosphere ◽  
Ambient Conditions ◽  
Natural Convection Flow ◽  
Turbulent Natural Convection

This paper presents a comprehensive mathematical model and numerical solutions for a natural convection flow over an isothermal, heated, vertical wall immersed in an ambient atmosphere that is thermally stratified. The model assumes a laminar flow near the leading edge, which then becomes a transitional flow, and finally becomes fully turbulent away from the leading edge. Effects of several typical cases of ambient stratification on heat transfer to the wall, peak velocity, and temperature are examined. It is found that the velocity field is affected more significantly by the “memory” of upstream ambient conditions than the temperature field.

Scaling of the Turbulent Natural Convection Flow in a Heated Square Cavity

1994 ◽  
Vol 116 (2) ◽  
pp. 400-408 ◽  
Author(s):  
R. A. W. M. Henkes ◽  
C. J. Hoogendoorn
Keyword(s):  
Natural Convection ◽  
Rayleigh Number ◽  
Convection Flow ◽  
Convection Boundary Layer ◽  
Square Cavity ◽  
Natural Convection Flow ◽  
Turbulent Natural Convection ◽  
Convection Boundary ◽  
Vertical Walls ◽  
Rayleigh Numbers

By numerically solving the Reynolds equations for air and water in a square cavity, with differentially heated vertical walls, at Rayleigh numbers up to 1020 the scalings of the turbulent natural convection flow are derived. Turbulence is modeled by the standard k–ε model and by the low-Reynolds-number k–ε models of Chien and of Jones and Launder. Both the scalings with respect to the Rayleigh number (based on the cavity size H) and with respect to the local height (y/H) are considered. The scalings are derived for the inner layer, outer layer, and core region. The Rayleigh number scalings are almost the same as the scalings for the natural convection boundary layer along a hot vertical plate. The scalings found are almost independent of the k–ε model used.

THERMAL LATTICE BGK SIMULATION OF TURBULENT NATURAL CONVECTION DUE TO INTERNAL HEAT GENERATION

2003 ◽  
Vol 17 (01n02) ◽  
pp. 173-177 ◽  
Author(s):  
BAOCHANG SHI ◽  
ZHAOLI GUO
Keyword(s):  
Natural Convection ◽  
Heat Generation ◽  
Internal Heat ◽  
Internal Heat Generation ◽  
Convection Flow ◽  
Bgk Model ◽  
Natural Convection Flow ◽  
Turbulent Natural Convection ◽  
Prandtl Numbers ◽  
Rayleigh Numbers

A thermal lattice BGK model with a robust boundary scheme for the Boussinesq incompressible fluids is introduced. The 2D numerical simulation of natural convection flow due to internal heat generation in a square cavity are performed at Rayleigh numbers 106 - 1012 and Prandtl numbers 0.25 and 0.6. The numerical results are compared with those of previous studies in detail.

Experimental investigation on the natural convection flow in pool boiling

2014 ◽  
Vol 280 ◽  
pp. 349-361 ◽  
Author(s):  
Seok Kim ◽  
Dong Eok Kim ◽  
Sung Uk Ryu ◽  
Seung Tae Lee ◽  
Dong-Jin Euh
Keyword(s):  
Experimental Investigation ◽  
Natural Convection ◽  
Pool Boiling ◽  
Convection Flow ◽  
Natural Convection Flow
Sign in / Sign up

Export Citation Format

Share Document