scholarly journals Centrifugal Instability with Convective Heat Transfer Through a Tightly Coiled Square Duct

2019 ◽  
Vol 6 (3) ◽  
pp. 397-408 ◽  
Author(s):  
Mohammad Hasan ◽  
Rabindra Mondal ◽  
Giulio Lorenzini
Keyword(s):  
Heat Transfer ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Square Duct ◽  
Centrifugal Instability

Fluid flow and convective heat transfer in a rotating helical square duct

2006 ◽  
Vol 45 (10) ◽  
pp. 1008-1020 ◽  
Author(s):  
Yitung Chen ◽  
Huajun Chen ◽  
Benzhao Zhang ◽  
Hsuan-Tsung Hsieh
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Square Duct

Optimization of turbulent convective heat transfer of CuO/water nanofluid in a square duct

2019 ◽  
Vol 138 (1) ◽  
pp. 517-529 ◽  
Author(s):  
Seyed Iman Vasefi ◽  
Farzad Bazdidi-Tehrani ◽  
Mohammad Sedaghatnejad ◽  
Arash Khabazipur
Keyword(s):  
Heat Transfer ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Square Duct

Fully-Developed Convective Heat Transfer and Pressure Drop in a Square Duct With Baffle Inserts Using Cfd Analysis

2021 ◽  
Author(s):  
Lasse Uhd Christensen ◽  
Stefan Holebaek ◽  
Nisanthan Sanmughanathan ◽  
Hã£â¦Rvig Hã£â¦Rvig ◽  
Henrik Sørensen
Keyword(s):  
Heat Transfer ◽  
Pressure Drop ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Cfd Analysis ◽  
Square Duct

Effects of Curvature and Convective Heat Transfer in Curved Square Duct Flows

2006 ◽  
Vol 128 (5) ◽  
pp. 1013-1022 ◽  
Author(s):  
R. N. Mondal ◽  
Y. Kaga ◽  
T. Hyakutake ◽  
S. Yanase
Keyword(s):  
Heat Transfer ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Outer Wall ◽  
Heated Wall ◽  
Dean Number ◽  
Square Duct ◽  
Nusselt Numbers ◽  
Wide Range ◽  
Steady Solutions

Non-isothermal flows with convective heat transfer through a curved duct of square cross section are numerically studied by using a spectral method, and covering a wide range of curvature, δ, 0<δ≤0.5 and the Dean number, Dn, 0≤Dn≤6000. A temperature difference is applied across the vertical sidewalls for the Grashof number Gr=100, where the outer wall is heated and the inner one cooled. Steady solutions are obtained by the Newton-Raphson iteration method and their linear stability is investigated. It is found that the stability characteristics drastically change due to an increase of curvature from δ = 0.23 to 0.24. When there is no stable steady solution, time evolution calculations as well as their spectral analyses show that the steady flow turns into chaos through periodic or multi-periodic flows if Dn is increased no matter what δ is. The transition to a periodic or chaotic state is retarded with an increase of δ. Nusselt numbers are calculated as an index of horizontal heat transfer and it is found that the convection due to the secondary flow, enhanced by the centrifugal force, increases heat transfer significantly from the heated wall to the fluid. If the flow becomes periodic and then chaotic, as Dn increases, the rate of heat transfer increases remarkably.

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