Flow felid and heat transfer enhancement investigations by using a combination of corrugated tubes with a twisted tape within 3D circular tube based on different dimple configurations

Heat Transfer ◽  
2021 ◽  
Author(s):  
Ahmed Ramadhan Al‐Obaidi ◽  
Jassim Alhamid ◽  
Faik Hamad
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Circular Tube ◽  
Twisted Tape ◽  
Transfer Enhancement

CFD simulation of heat transfer enhancement in circular tube with twisted tape insert by using nanofluids

2020 ◽  
Vol 21 ◽  
pp. 572-577 ◽  
Author(s):  
A. Natarajan ◽  
R. Venkatesh ◽  
S. Gobinath ◽  
L. Devakumar ◽  
K. Gopalakrishnan
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Cfd Simulation ◽  
Circular Tube ◽  
Twisted Tape ◽  
Transfer Enhancement

scholarly journals CFD Analysis for Heat Transfer Enhancement inside a Circular Tube with Half-Length Upstream and Half-Length Downstream Twisted Tape

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
R. J. Yadav ◽  
A. S. Padalkar
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Circular Tube ◽  
Swirl Flow ◽  
Twisted Tape ◽  
Turbulent Regime ◽  
Cfd Analysis ◽  
Transfer Enhancement ◽  
Plain Tube ◽  
Half Length

CFD investigation was carried out to study the heat transfer enhancement characteristics of air flow inside a circular tube with a partially decaying and partly swirl flow. Four combinations of tube with twisted-tape inserts, the half-length upstream twisted-tape condition (HLUTT), the half-length downstream twisted-tape condition (HLDTT), the full-length twisted tape (FLTT), and the plain tube (PT) with three different twist parameters (, 0.27, and 0.38) have been investigated. 3D numerical simulation was performed for an analysis of heat transfer enhancement and fluid flow for turbulent regime. The results of CFD investigations of heat transfer and friction characteristics are presented for the FLTT, HLUTT, and the HLDTT in comparison with the PT case.

scholarly journals Two-way fluid-structure interaction study of twisted tape insert in a circular tube having integral fins with nanofluid

2021 ◽  
Vol 3 (8(111)) ◽  
pp. 25-34
Author(s):  
Mustafa Abdulsalam Mustafa ◽  
Atheer Raheem Abdullah ◽  
Wajeeh Kamal Hasan ◽  
Laith J. Habeeb ◽  
Maadh Fawzi Nassar
Keyword(s):  
Heat Transfer ◽  
Turbulent Flow ◽  
Heat Transfer Enhancement ◽  
Circular Tube ◽  
Fluid Structure Interaction ◽  
Twisted Tape ◽  
Transfer Enhancement ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Laminar And Turbulent Flow

This work deals with fluid-structure interaction (FSI), one of the emerging areas of numerical simulation and calculation. This research shows a numerical study investigating heat transfer enhancement and fluid-structure interaction in a circular finned tube by using alumina nanofluid as a working fluid with a typical twisted tape that has a twisting ratio of 1.85. The studied nanofluid volumes of fraction are φ=0, 3, 5 % under conditions of laminar and turbulent flow. The solution for such problems is based on the relations of continuum mechanics and is mostly done with numerical methods. FSI occurs when the flow of fluid influences the properties of a structure or vice versa. It is a computational challenge to deal with such problems due to complexity in defining the geometries, nature of the interaction between a fluid and solid, intricate physics of fluids and requirements of computational resources. CFD investigations were made based on the numerical finite volume techniques to solve the governing three-dimensional partial differential equations to get the influence of inserted twisted tape and concentration of nanofluid on heat transfer enhancement, friction loss, average Nusselt number, velocity profile, thermal performance factor characteristics, and two-way interaction in a circular tube at laminar and turbulent flow. The governing continuity, momentum and energy transfer equations are solved using Ansys Fluent and Transient Structural. The simulation results show that the deformations of two-way coupling fluctuate from side to side, with 0.004 mm, as maximum amplitude, located at the typical twisted tape center. Heat transfer dissipation improved by adding fins and as Reynolds numbers increase the heat transfer behavior increases.

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