Computational Fluid Dynamics Analysis of an Enhanced Tube with Backward Louvered Strip Insert

Agung Tri Wijayanta, Budi Kristiawan, Pranowo, Agung Premono and Muhammad Aziz
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Agung Tri Wijayanta: Department of Mechanical Engineering, Faculty of Engineering, Universitas Sebelas Maret, Kampus UNS Kentingan, Jl. Ir. Sutami 36A Jebres, Surakarta 57126, Indonesia
Budi Kristiawan: Department of Mechanical Engineering, Faculty of Engineering, Universitas Sebelas Maret, Kampus UNS Kentingan, Jl. Ir. Sutami 36A Jebres, Surakarta 57126, Indonesia
Pranowo: Research Group of Sustainable Thermofluids, Universitas Sebelas Maret, Kampus UNS Kentingan, Jl. Ir. Sutami 36A Jebres, Surakarta 57126, Indonesia
Agung Premono: Department Mechanical Engineering, Jakarta State University, Jl. UNJ Kampus A, Jl. Rawamangun Muka Jakarta Timur 13220, Indonesia
Muhammad Aziz: Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan

Energies, 2019, vol. 12, issue 17, 1-12

Abstract: A computational solution of an enhanced tube equipped with a backward louvered strip insert with various pitches was evaluated in this work. A k-ε renormalized group turbulence model has been applied for the turbulent model. Different pitches, S , of 40, 50, and 60 mm were investigated for the Reynolds number with a range of 10,000–17,500 using water as a working fluid. The extra louvered strip caused fluid flow disturbance, so that the flow pattern formed more turbulence. The turbulent flow was characterized by the flow pattern on the back of the inserts that form a vortex. The vortices formed caused a better heat transfer. The results of the computational analysis showed that the enhanced tube had a louvered strip with a pitch distance S = 40, 50, and 60 mm could increase the Nusselt numbers to 1.81, 1.75, and 1.72, and the friction factor to 7.59, 6.51, and 5.77 times greater than the plain tube, respectively.

Keywords: louvered strip insert; pitch; Nusselt number; friction factor; turbulent flow; numerical investigation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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