Heat Transfer and Fluid Flow Behavior of a Carbon-Based Hybrid Nanofluid in a Microchannel Heat Sink

• Published in: Heat transfer engineering Vol. 45; no. 17-18; pp. 1511 - 1522
• Main Authors: Balaji, Thirumaran, Sharan, Rajendiran, Selvam, Chandrasekaran, Lal, Dhasan Mohan
• Format: Journal Article
• Language: English
• Published: Philadelphia Taylor & Francis 10.10.2024; Taylor & Francis Ltd
• Subjects: Carbon; Fluid flow; Graphene; Heat flux; Heat sinks; Heat transfer; Heat transfer coefficients; Laminar flow; Laminar heat transfer; Microchannels; Multi wall carbon nanotubes; Nanofluids; Nanomaterials; Pressure drop
• ISSN: 0145-7632; 1521-0537
• DOI: 10.1080/01457632.2023.2268864

In this article, detailed work on the heat transfer and fluid flow behavior of carbon-based hybrid nanofluid (multi-walled carbon nanotubes + graphene nanoplatelets/H 2 O) was studied numerically. The carbon-based hybrid nanofluids have been prepared experimentally and their measured properties were used for this study. The numerical study was carried out by passing the nanofluids under laminar flow through the tube side of the microchannel heat sink (MCHS). A constant heat flux on the heat sink base was applied and a single-phase model approach was used for analyzing the heat transfer. The nanofluid volume concentration varied from 0.01% to 0.2%. The improvement in the heat transfer coefficient is observed to be a maximum of 73%, with a maximum of 18% pressure drop variation across the MCHS for 0.2 vol%. The pressure drop variation across the MCHS is minimal for all the considered volume fractions of the nanomaterials. The results confirmed that the hybrid nanofluid possesses a remarkable heat transfer characteristic for transporting heat effectively.