scholarly journals Flow Visualization of the Reverse Flow on Three-dimensional Mixed Convection in a Horizontal Square Duct

2002 ◽  
Vol 22 (1Supplement) ◽  
pp. 281-284
Author(s):  
Koichi ICHIMIYA ◽  
Koji TORIYAMA ◽  
Tetsu SATO
Keyword(s):  
Mixed Convection ◽  
Flow Visualization ◽  
Reverse Flow ◽  
Three Dimensional ◽  
Square Duct

Laminar Mixed Convection Adjacent to Three-Dimensional Backward-Facing Step

2001 ◽  
Vol 124 (1) ◽  
pp. 209-213 ◽  
Author(s):  
A. Li and ◽  
B. F. Armaly
Keyword(s):  
Nusselt Number ◽  
Mixed Convection ◽  
Reverse Flow ◽  
Three Dimensional ◽  
Flow Region ◽  
The Other ◽  
Backward Facing Step ◽  
Number Range ◽  
Grashof Number ◽  
Recirculation Flow

Simulations of three-dimensional laminar buoyancy-assisting mixed convection adjacent to a backward-facing step in a vertical rectangular duct are presented to demonstrate the influence of Grashof number on the distributions of the Nusselt number, and the reverse flow regions that develop adjacent to the duct’s walls. The Reynolds number, and duct’s geometry are kept constant: heat flux at the wall downstream from the step is kept uniform but its magnitude varied to cover a Grashof number range of 0–4000; all the other walls in the duct are kept at adiabatic condition; and the flow, upstream of the step, is treated as fully developed and isothermal. Increasing the Grashof number results in increasing the Nusselt number; the size of the secondary recirculation flow region adjacent to the stepped wall; the size of the reverse flow region adjacent to the sidewall and the flat wall; and the spanwise flow from the sidewall toward the center of the duct. On the other hand, the size of the primary recirculation flow region adjacent to the stepped wall decreases and detaches partially from the heated stepped wall as the Grashof number increases. Details are presented and discussed.

scholarly journals Flow Visualization of Benard-Type Mixed Convection in a Horizontal Square Duct

2005 ◽  
Vol 25 (Supplement1) ◽  
pp. 231-232
Author(s):  
Koichi ICHIMIYA ◽  
Koji TORIYAMA ◽  
Daisuke WATANABE
Keyword(s):  
Mixed Convection ◽  
Flow Visualization ◽  
Square Duct
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