CFD analysis of heat transfer enhancement by helical inserts

Name: Worapon Tipkaew

LCSH: Kasetsart University -- Theses. M.Eng. (Mechanical and Design Engineering) 2023.

Classification :.LCCS: TJ260

LCSH: Kasetsart University. -- Department of Mechanical Engineering -- Theses.

LCSH: Heat -- Transmission.

LCSH: Computational fluid dynamics

LCSH: Fluid dynamics -- Mathematical models.

LCSH: Helical springs.

Abstract: This study focuses on the investigation by numerical simulation of heat transfer enhancement in a straight pipe subjected to a constant heat flux, using helical inserts. Various geometrical parameters, such as the pitch length, tape length and angle are assessed in comparison to the case without insert. The turbulent flow is analysed for Reynolds numbers in the range 5,000 < Re < 20,000, and for two values of Prandtl number, Pr = 0.7 and Pr = 7, corresponding to air and water respectively. RANS simulations are carried out using Ansys Fluent and fully developed flows are considered using periodic boundary conditions. The accuracy is ensured by grid convergence tests and model validations. The investigation focuses on the significant impact parameters of the helical insert, which generates rotational fluid flow and improves heat transfer from the wall boundary to the fluid region. The predicted velocity and temperature fields are analysed, and the friction factor, Nusselt number, and a thermal enhancement factor (TEF) are used to determine the optimum geometric configuration of the helical insert. While a significant increase of heat transfer is achieved, it is also shown that further modifications of the geometry would be necessary to increase the TEF.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Rodolphe Perrin

Role: Thesis Advisor

Name: Suabsakul Gururatana

Role: Thesis Co-Advisor

Created: 2023

Modified: 2025-06-25

Issued: 2025-06-25

วิทยานิพนธ์/Thesis

วิทยานิพนธ์/Thesis

application/pdf

URL: http://www.lib.ku.ac.th/KUthesis/2566/worapon-tip-all.pdf

CallNumber: TJ260.W67

eng

DegreeName: Master of Engineering

Level: Master's Degree

Descipline: Mechanical and Design Engineering

Grantor: Kasetsart University

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