Heat transfer augmentation through convergence angles in a pipe

@article{AlSammarraie2017HeatTA,
  title={Heat transfer augmentation through convergence angles in a pipe},
  author={Ahmed T. Al-Sammarraie and Kambiz Vafai},
  journal={Numerical Heat Transfer, Part A: Applications},
  year={2017},
  volume={72},
  pages={197 - 214}
}
ABSTRACT Forced convection in a combined entry developing length of a convergent pipe under constant wall heat flux boundary condition is performed in this work. Influences of the convergence angle, Reynolds, and Prandtl numbers on the heat transfer and flow field have been investigated. The numerical results are obtained for a wide range of convergence angles (0°–25°), Reynolds numbers (700–2100), and Prandtl numbers (0.707, 5.83). Compared to a traditional pipe, a substantial increase in heat… Expand
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References

SHOWING 1-10 OF 17 REFERENCES
Mixed convection flow and heat transfer in a heated vertical convergent channel
Experimental studies of the mixed convection flow and heat transfer in a vertical convergent channel have been carried out. One of the side walls which maintains the vertical position is heatedExpand
Heat transfer in a tapered passage
Abstract Heat transfer to laminar flow in tapered passages is studied for two types of thermal boundary conditions: prescribed heat flux on both walls, and on one wall with the other wall adiabatic.Expand
Heat transfer and fluid flow characteristics for an annulus of periodically varying cross section
The fully developed laminar-flow and temperature fields of a double-pipe heat-exchanger with an annular duct of streamwise-periodic-varying cross-sectional area are investigated analytically forExpand
Laminar flow development and heat transfer in converging plane-walled channels
The characteristics of flow development and heat transfer in converging plane-walled channels are studied by the finite difference method. The velocity and temperature profiles in both angular andExpand
Onset of secondary flow and enhancement of heat transfer in horizontal convergent and divergent channels heated from below
Abstract Experiments for the onset and development of the buoyancy driven secondary air flow and enhancement of heat transfer in a horizontal convergent and a divergent channel have been carried out.Expand
Secondary flow and enhancement of heat transfer in horizontal parallel-plate and convergent channels heating from below
Abstract Experimental studies of secondary air flow structure and enhancement of heat transfer in horizontal parallel-plate and convergent channels have been carried out. The bottom wall isExpand
Forced convection in convergent and divergent ducts of rectangular cross section
Abstract This paper describes the simulation of forced convection in convergent and divergent ducts of rectangular cross section. The flow is modeled as being three-dimensional and parabolic, withExpand
Analytical Characterization and Production of an Isothermal Surface for Biological and Electronic Applications
Characterization and regulation of isothermal surfaces are key issues in a number of thermal management devices. The surface temperature uniformity can be controlled utilizing a variable area channelExpand
Analysis of Heat Transfer in Consecutive Variable Cross-Sectional Domains: Applications in Biological Media and Thermal Management
Temperature prescription and control is important within biological media and in bioheat transport applications such as in hyperthermia cancer treatment in which the unhealthy tissue/organ is subjectExpand
Boundary-layer convective heat transfer in a convergent channel
In this paper the numerical solution of the heat transfer problem in a convergent channel with uniform and non-uniform wall temperatures under boundary-layer approximations has been presented. Also,Expand
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