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Optimum design study of a straight tube with different inserts for thermal performance characteristics
Author(s) -
Gupta Arun,
Singh Hardial
Publication year - 2020
Publication title -
heat transfer
Language(s) - English
Resource type - Journals
eISSN - 2688-4542
pISSN - 2688-4534
DOI - 10.1002/htj.21702
Subject(s) - insert (composites) , nusselt number , taguchi methods , nanofluid , tube (container) , materials science , heat transfer , design of experiments , mechanics , work (physics) , orthogonal array , mass flow rate , thermal , flow (mathematics) , simple (philosophy) , mechanical engineering , heat transfer coefficient , thermodynamics , reynolds number , mathematics , turbulence , composite material , engineering , physics , philosophy , statistics , epistemology
This paper presents a simple straight tube with different types of inserts in which there is a flow of water + Al 2 O 3 . The experimental and computational studies were performed for different inserts, such as simple insert, twisted‐I, twisted‐II, and simple straight tube. The coefficient of heat transfer and Nusselt number is computed for mass flow rate ranging between 0.06 and 0.20 m/s. The simple straight tube is used as a means of validating the experimental results with computational results. The work concluded that twisted‐II inserts provide enhanced thermal performance in comparison to all other process conditions. In this study, statistical analysis is performed by statistical software and by generating model equations. Furthermore, the effect of a twisted insert in heat pipe for two types of fluids, that is, water and nanofluid (Al 2 0 3 + water) is experimentally and computationally designed using the Taguchi method and orthogonal array concept. Moreover, temperature and velocity contours are developed for all four types of insert designs in the tube.