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… 
Thermal–Hydraulic Performance Analysis of a Convergent Double Pipe Heat Exchanger
The present investigation proposes an innovative convergent double pipe heat exchanger (C-DPHE). A two-dimensional (2D) axisymmetric heat transfer model with counterflow is employed to analyze the
Nanofluids transport through a novel concave/convex convergent pipe
Abstract The thermal and hydraulic performance of Al2O3-water nanofluid forced convective heat transfer through a concave/convex convergent pipe has been investigated in this work. The investigation
New method for the determination of convective heat transfer coefficient in fully-developed laminar pipe flow
Convective heat transfer coefficient is one of the most vital parameters which reveals the thermal efficiency of a pipe flow. To obtain such coefficients for problems with variable pipe wall
Graphing Behaviour of Heat Transfer In Terms of Nusselt and Reynolds
Heat exchangers are tools used to transfer thermal energy between two fluids (liquid or gas) by convection and conduction at different level of temperatures. Heat exchangers are the common equipment
Effect of Using Various Longitudinal Fin Number In Finned Channel Heat Exchangers On Heat Flow Characteristics
Article history: Received 5 August 2018 Received in revised form 28 September 2018 Accepted 5 October 2018 Available online 8 January 2019 This paper presents the air-side overall heat transfer
Optimal distribution of metal foam inserts in a double-pipe heat exchanger
PurposeIn the present research, a numerical investigation is carried out to study the fluid flow and heat transfer in a double-pipe, counter-flow heat exchanger exploiting metal foam inserts
Influence of Geometrical Changes in an Adiabatic Portion on the Heat Transfer Performance of a Two-Phase Closed Thermosiphon System
In this study, a modified non-uniform adiabatic section in a Two-Phase Closed Thermosiphon (TPCT) is proposed where the uniform section was replaced by convergent and divergent (C-D) sections. The
Thermal effect and optimal design of cooling pipes on mass concrete with constant quantity of water flow
Abstract To study the heat transfer of pipe cooling process in concrete, an effective model combined with a radial basis function collocation method (RBFCM) is proposed. In this model, a replicable
...
...

References

SHOWING 1-10 OF 17 REFERENCES
Heat transfer in a tapered passage
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 and
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, with
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 subject
Boundary-layer convective heat transfer in a convergent channel
EFFECT OF VARIABLE AXIAL CHORD ON A LOW-PRESSURE TURBINE BLADE
An experimentalstudy was conducted in a two-dimensional linearcascade,withfocuson thesuctionsurfaceof a low-pressureturbine blade. FlowReynolds numbers, based on exit velocity and suction surface
Axially Tapered Microchannels of High Aspect Ratio for Evaporative Cooling Devices
Analytical solutions are derived for evaporating flow in open rectangular microchannels having a uniform depth and a width that decreases along the channel axis. The flow generally consists of two
...
...