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Dergiler / Gazi Mühendislik Bilimleri Dergisi / 2026 / Volume: 12 Issue: 1

Influence of Nanoparticles Shape on Natural Convection Mechanism In a Square Enclosure Using Single-phase Model: A Numerical Study

Abdullah Dağdeviren(KARABUK UNIVERSITY)0000-0002-5418-4445
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Yayın Tarihi
2026-04-30
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⚡ TL;DR(1 Cümlede Hızlı Çıkarım)

It was emphasized that the use of spherical Al2O3, Fe3O4 and GO NPs provided significant improvements in heat transfer performance in systems operating at high Ra, and it was stated that SiO2-based NFs should be avoided in such applications.

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Amaç & Hipotez:This study numerically investigated the effects of different nanofluids and the added nanoparticle shapes types (brick, cylindrical, platelet, and spherical) and volumetric concentration (𝜑) on the average Nusselt number (Nuave) under natural convection (NC) conditions in a square enclosure.
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Temel Bulgular & Veri:In case of Ra=103, the Nuave increased for all nanofluids (NFs) and shape types.
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Sonuç & Katkı:It was emphasized that the use of spherical Al2O3, Fe3O4 and GO NPs provided significant improvements in heat transfer performance in systems operating at high Ra, and it was stated that SiO2-based NFs should be avoided in such applications.
🔬Tür:Research Article
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Nanofluid · Heat transfer · Nanoparticle shape

Abstract

This study numerically investigated the effects of different nanofluids and the added nanoparticle shapes types (brick, cylindrical, platelet, and spherical) and volumetric concentration (𝜑) on the average Nusselt number (Nuave) under natural convection (NC) conditions in a square enclosure. In case of Ra=103, the Nuave increased for all nanofluids (NFs) and shape types. The highest increase was observed with a 56.0% enhancement in the platelet shape of the GO/H2O NF in the 𝜑=5.0%. For all Ra values except Ra=103, the Nuave was generally observed to decrease as 𝜑 increased. For all Ra values and NP shapes, the SiO2/H2O NF exhibited the lowest Nuave values compared to the other NFs. It was emphasized that the use of spherical Al2O3, Fe3O4 and GO NPs provided significant improvements in heat transfer performance in systems operating at high Ra, and it was stated that SiO2-based NFs should be avoided in such applications.

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Bu Makaleye Atıf Yap

Dağdeviren, A. (2026). Influence of Nanoparticles Shape on Natural Convection Mechanism In a Square Enclosure Using Single-phase Model: A Numerical Study. Gazi Mühendislik Bilimleri Dergisi, Volume: 12 Issue: 1. https://ajindex.com/articles/1397336

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