Three-Dimensional Simulation of Turbulent Gas-Solid Flow and Heat Transfer in a Pipe

2009 ◽  
Author(s):  
Z. Mansoori ◽  
A. Dadashi ◽  
M. Saffar-Avval ◽  
F. Behzad ◽  
G. Ahmadi
Keyword(s):  
Heat Transfer ◽  
Inelastic Collision ◽  
Three Dimensional ◽  
Wall Heat Transfer ◽  
Vertical Pipe ◽  
Solid Flow ◽  
Collision Model ◽  
Flow And Heat Transfer ◽  
Dimensional Simulation ◽  
Wall Interactions

Three-dimensional simulation of turbulent gas-solid flow with heat transfer for a vertical pipe is performed in this study and the results are presented. The approach is based on an Eulerian/Lagrangian four-way interaction formulation considering turbulent hydrodynamic and thermal intensities and time scales equations. Inter-particles and particle-wall interactions are accounted for with an inelastic collision model. Numerical model validation is performed for an upward pipe gas-solid flow with constant wall heat transfer.

Natural Convection in a Partitioned Cubic Enclosure

1992 ◽  
Vol 114 (2) ◽  
pp. 410-417 ◽  
Author(s):  
K. C. Karki ◽  
P. S. Sathyamurthy ◽  
S. V. Patankar
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Numerical Solutions ◽  
Three Dimensional ◽  
The Other ◽  
Two Dimensional ◽  
Flow And Heat Transfer ◽  
Dimensional Simulation ◽  
Oriented Parallel ◽  
Rayleigh Numbers

Numerical solutions are obtained for fluid flow and heat transfer in a cubic enclosure with a vertical adiabatic partition. The two zones of the enclosure are connected by a single rectangular opening. The partition is oriented parallel to the isothermal sidewalls, one of which is heated and the other cooled while the remaining walls are adiabatic. Results have been presented for air for the Rayleigh numbers in the range 104−107. The width of the opening is held fixed while the height, relative to the enclosure height, is varied from 0.25 to 0.75. The effects of various parameters on the flow structure and heat transfer are investigated. The results of the three-dimensional simulation have also been compared with those for the corresponding two-dimensional configurations.

Direct Numerical Simulation of Turbulent Separated Flow and Heat Transfer Over a Blunt Flat Plate

2003 ◽  
Vol 125 (5) ◽  
pp. 779-787 ◽  
Author(s):  
Hideki Yanaoka ◽  
Hiroyuki Yoshikawa ◽  
Terukazu Ota
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Flat Plate ◽  
Large Scale ◽  
Three Dimensional ◽  
Separated Flow ◽  
Flow Region ◽  
Essential Difference ◽  
Flow And Heat Transfer ◽  
Dimensional Simulation

Three-dimensional simulation of turbulent separated and reattached flow and heat transfer over a blunt flat plate is presented. The Reynolds number analyzed is 5000. The vortices shed from the reattachment flow region exhibit a hairpin-like structure. These large-scale vortex structures greatly influence the heat transfer in the reattachment region. Present results are compared with the previous three-dimensional calculations at low Reynolds number and it is found that there is no essential difference between two results with respect to the flow structure. The reattachment length is about five plate thicknesses, which is nearly equal to the previous experimental ones. The velocity distributions and turbulence intensities are in good agreement with the experimental data. Further, it is clarified that Nusselt number and temperature distributions greatly depend upon the Reynolds number, though their characteristic behaviors are qualitatively well simulated.

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