Two-phase modeling of low-Reynolds turbulent heat convection of Al2O3-water nanofluid in a 2-D helically corrugated channel

2021 ◽  
pp. 1-21
Author(s):  
Hamed Mirzaee ◽  
Roohollah Rafee ◽  
Saman Rashidi ◽  
Mohammad Sadegh Valipour
Keyword(s):  
Heat Convection ◽  
Turbulent Heat ◽  
Two Phase ◽  
Corrugated Channel ◽  
Low Reynolds

scholarly journals Transition to chaos in a cross-corrugated channel at low Reynolds numbers

2019 ◽  
Vol 31 (11) ◽  
pp. 114107
Author(s):  
Xiaowei Zhu ◽  
Jens Honore Walther ◽  
Dan Zhao ◽  
Fredrik Haglind
Keyword(s):  
Reynolds Numbers ◽  
Low Reynolds Numbers ◽  
Corrugated Channel ◽  
Transition To Chaos ◽  
Low Reynolds

A Finite Element Study of Low Reynolds Number Two-Phase Flow in Cylindrical Tubes

1985 ◽  
Vol 52 (2) ◽  
pp. 253-256 ◽  
Author(s):  
E. I. Shen ◽  
K. S. Udell
Keyword(s):  
Reynolds Number ◽  
Finite Element ◽  
Low Reynolds Number ◽  
Cell Movement ◽  
Cylindrical Tube ◽  
Two Phase ◽  
Bubble Liquid ◽  
Cylindrical Tubes ◽  
Low Reynolds ◽  
Steady State Problem

A finite element solution to the steady-state problem of an inviscid bubble flowing at low Reynolds number in a cylindrical tube occupied by a second viscous phase was obtained. Interfacial tension forces were balanced against the viscous and pressure forces in order to locate the position of bubble-liquid interface. Velocities, pressures, and film thicknesses were obtained as a function of the capillary number. Specific applications of these results include the description of multiphase flow in tubes and porous media, and blood cell movement in small capillaries. The numerical results are compared with published theories and experiments.

scholarly journals Computation of Turbulent Heat Transfer on the Walls of a 180 Degree Turn Channel With a Low Reynolds Number Reynolds Stress Model

2002 ◽  
Author(s):  
D. L. Rigby ◽  
A. A. Ameri ◽  
E. Steinthorsson
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Reynolds Stress ◽  
Low Reynolds Number ◽  
Reynolds Stress Model ◽  
Turbulent Heat Transfer ◽  
Turbulent Heat ◽  
Stress Model ◽  
Generalized Gradient ◽  
Low Reynolds

The Low Reynolds number version of the Stress-ω model and the two equation k-ω model of Wilcox were used for the calculation of turbulent heat transfer in a 180 degree turn simulating an internal coolant passage. The Stress-ω model was chosen for its robustness. The turbulent thermal fluxes were calculated by modifying and using the Generalized Gradient Diffusion Hypothesis. The results showed that using this Reynolds Stress model allowed better prediction of heat transfer compared to the k-ω two equation model. This improvement however required a finer grid and commensurately more CPU time.

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