Thermal behavior study of carbon nanofiber nanofluids and banana leaf nanofluids in a rotating disk flow

K. Jyothi^a, A.P. Lingaswamy<sup>b

a</sup> Department of Humanities and Basic Sciences, G. Pulla Reddy Engineering College, Kurnool, Andhra Pradesh, India
^b Department of Physics, G. Pulla Reddy Engineering College, Kurnool, Andhra Pradesh, India

Abstract: We present a comparative evaluation of heat and mass transfer in nanofluids incorporating a banana leaf nanofiber (BLF) and carbon nanofibers (CNFs) with water as the base fluid. We made a novel attempt that by using BLF we can enhance the thermal conductivity even though CNFs have high thermal properties. We calculate the Nusselt number, Sherwood number, and skin friction coefficient to examine the influence of these nanoparticles. The BLF, an organic and sustainable option, contrasts with CNFs, which offers exceptional thermal enhancement. The equations governing the flow are solved using finite element methods. While both nanofluids improve heat and mass transfer, CNFs demonstrate superior thermal properties, whereas BLF offers an environmentally friendly and cost-effective alternative. The study expands on the use of nanofluids in heat exchangers, cooling systems, thermal management of electronics, and sustainable engineering solutions.

Keywords: banana leaf fiber nanoparticles, carbon nanofibers, disk geometry, sustainable nanomaterials, skin friction coefficient, thermal conductivity.

Received: 22.01.2025
Revised: 02.04.2025

DOI: 10.4213/tmf10893

 English version: Theoretical and Mathematical Physics, 2025, 223:3, 926–934

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