Numerical Hydrothermal Investigation of Multiphase Flow of Aqueous Alumina Nanofluids in Millichannels

Aliihsan Koca; Mansur Mustafaoğlu (nasiri Khalaji); Muhammet Kaan Yeşilyurt

doi:10.64808/engineeringperspective.1768112

Numerical Hydrothermal Investigation of Multiphase Flow of Aqueous Alumina Nanofluids in Millichannels

Abstract

The increasing power density of modern electronics necessitates advanced thermal management solutions beyond the capabilities of conventional cooling methods. While multiphase flow boiling in millichannels is a promising approach, there is a scarcity of data on the performance of nanofluids within this regime, particularly concerning the establishment of stable and hydrodynamically efficient annular flows. This study numerically investigates the heat transfer and hydrodynamic characteristics of multiphase flows of aqueous alumina (Al₂O₃) nanofluids (0.25% and 0.5% volumetric concentrations) within a rectangular millichannel to address this gap. A key contribution of this work is the use of an integrated modeling approach, where a one-dimensional (1D) analytical model is first used to define the boundary conditions required to achieve a stable, thin-film annular flow across the entire channel length. These conditions are then implemented in a comprehensive three-dimensional (3D) multiphase computational fluid dynamics (CFD) model. Results demonstrate that increasing nanoparticle concentration enhances heat transfer, with the nanofluids providing an improvement in heat transfer up to 35.6% compared to pure water. This improvement, however, is accompanied by an increase in pressure drop of 10.9% and 18.2% for the 0.25% and 0.5% concentrations, respectively. By providing detailed performance data for nanofluids in a controlled annular flow regime, this study contributes to the design and optimization of next-generation, high-heat-flux cooling systems and directly contributes to the underexplored area of multiphase nanofluid dynamics in millichannels.

Keywords

Supporting Institution

TUBITAK

Project Number

TUBITAK 3501 Project #118M457

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Details

Primary Language

English

Subjects

Experimental Methods in Fluid Flow, Heat and Mass Transfer

Journal Section

Research Article

Authors

Aliihsan Koca
Türkiye

Mansur Mustafaoğlu (nasiri Khalaji)
0000-0003-2976-0196
Türkiye

Muhammet Kaan Yeşilyurt ^*
0000-0002-7207-1743
Türkiye

Early Pub Date

December 16, 2025

Publication Date

December 30, 2025

Submission Date

August 18, 2025

Acceptance Date

October 25, 2025

Published in Issue

Year 2025 Volume: 5 Number: 4

DOI

https://doi.org/10.64808/engineeringperspective.1768112

IZ

https://izlik.org/JA52HT24AF

Cite

RIS / Bibtex

APA

Koca, A., Mustafaoğlu (nasiri Khalaji), M., & Yeşilyurt, M. K. (2025). Numerical Hydrothermal Investigation of Multiphase Flow of Aqueous Alumina Nanofluids in Millichannels. Engineering Perspective, 5(4), 162-182. https://doi.org/10.64808/engineeringperspective.1768112

AMA

1.Koca A, Mustafaoğlu (nasiri Khalaji) M, Yeşilyurt MK. Numerical Hydrothermal Investigation of Multiphase Flow of Aqueous Alumina Nanofluids in Millichannels. engineeringperspective. 2025;5(4):162-182. doi:10.64808/engineeringperspective.1768112

Chicago

Koca, Aliihsan, Mansur Mustafaoğlu (nasiri Khalaji), and Muhammet Kaan Yeşilyurt. 2025. “Numerical Hydrothermal Investigation of Multiphase Flow of Aqueous Alumina Nanofluids in Millichannels”. Engineering Perspective 5 (4): 162-82. https://doi.org/10.64808/engineeringperspective.1768112.

EndNote

Koca A, Mustafaoğlu (nasiri Khalaji) M, Yeşilyurt MK (December 1, 2025) Numerical Hydrothermal Investigation of Multiphase Flow of Aqueous Alumina Nanofluids in Millichannels. Engineering Perspective 5 4 162–182.

IEEE

[1]A. Koca, M. Mustafaoğlu (nasiri Khalaji), and M. K. Yeşilyurt, “Numerical Hydrothermal Investigation of Multiphase Flow of Aqueous Alumina Nanofluids in Millichannels”, engineeringperspective, vol. 5, no. 4, pp. 162–182, Dec. 2025, doi: 10.64808/engineeringperspective.1768112.

ISNAD

Koca, Aliihsan - Mustafaoğlu (nasiri Khalaji), Mansur - Yeşilyurt, Muhammet Kaan. “Numerical Hydrothermal Investigation of Multiphase Flow of Aqueous Alumina Nanofluids in Millichannels”. Engineering Perspective 5/4 (December 1, 2025): 162-182. https://doi.org/10.64808/engineeringperspective.1768112.

JAMA

1.Koca A, Mustafaoğlu (nasiri Khalaji) M, Yeşilyurt MK. Numerical Hydrothermal Investigation of Multiphase Flow of Aqueous Alumina Nanofluids in Millichannels. engineeringperspective. 2025;5:162–182.

MLA

Koca, Aliihsan, et al. “Numerical Hydrothermal Investigation of Multiphase Flow of Aqueous Alumina Nanofluids in Millichannels”. Engineering Perspective, vol. 5, no. 4, Dec. 2025, pp. 162-8, doi:10.64808/engineeringperspective.1768112.

Vancouver

1.Aliihsan Koca, Mansur Mustafaoğlu (nasiri Khalaji), Muhammet Kaan Yeşilyurt. Numerical Hydrothermal Investigation of Multiphase Flow of Aqueous Alumina Nanofluids in Millichannels. engineeringperspective. 2025 Dec. 1;5(4):162-8. doi:10.64808/engineeringperspective.1768112