Volume 62, Issue 340, January - April 2026

The influence of corrugation amplitude on entropy production of turbulent flow in outward corrugated converging pipes

Taiwo Bukola Fasiku^1♦, Ayobami Jeremiah Awodunmila²

¹Department of Physics, Ajayi Crowther University, Oyo-Town, Nigeria
²Centre for Energy and Research Development, Obafemi Awolowo University, Ile-Ife, Nigeria

^♦Corresponding Author
Taiwo Bukola Fasiku, Department of Physics, Ajayi Crowther University, Oyo-Town, Nigeria

ABSTRACT

This study investigated the entropy production rate of turbulent distilled water flowing through three corrugated converging pipes of various corrugation amplitudes. The impact of the corrugation amplitude (0.02 ≤ 𝑒⁄𝐷 ≤ 0.03) and Reynolds number (0.5 × 104 ≤ 𝑅𝑒 ≤ 4.0 × 104) on entropy production rate (EPR) and Bejan number were examined. The finite volume method was utilised to solve the governing equations and the turbulent model (SST 𝑘 − 𝜔 model), taking into account the boundary conditions stated in the ANSYS Fluent. The findings showed that increasing the corrugation amplitude and Reynolds number reduces the thermal entropy production rate, 𝑆𝑡ℎ𝑒𝑟, compared to a straight pipe. On the contrary, as the aforementioned parameters increase the viscous entropy production, 𝑆𝑣𝑖𝑠𝑐, increases. Therefore, using corrugated converging pipe with enhance corrugation amplitude reduces the entropy production rate compared to a straight pipe.

Keywords: Improvement, Entropy production, Reynolds number, Corrugation, Convergence

Discovery, 2026, 62, e8d3237

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Published: 18 March 2026