Preparation of Bauxite/Deionized Water Nanofluid and Experimental Investigation of Its Thermophysical Properties

Year 2021, , 355 - 359, 01.06.2021

Duygu Y. Aydın , Metin Gürü , Adnan Sözen

https://doi.org/10.2339/politeknik.649417

Cited By: 3

Abstract

In this study, bauxite/deionized water nanofluid was prepared by two-step method and its thermopyhsical properties were experimentally investigated. Bauxite was milled by high-energy spex type ball milling attritor. Bauxite nanoparticles with a size of 38 nm (2% by weight) and Sodium Dodecyl Benzene Sulfonate (0.5% by weight) were doped into the deionized water while preparing the bauxite nanofluid. Ultrasonication was applied for two hours to obtain stable colloidal dispersions of nanoparticles. It has been seen that the thermal characteristic of bauxite nanofluid is better than that of deionized water. The bauxite nanofluid has the lower surface tension and smaller contact angle than that of base fluid. However, the thermal conductivity and the specific heat of bauxite nanofluid increased by 8.47% and 4.4% compared to deionized water, respectively. 

Keywords

Bauxite, nanofluid, thermal conductivity, viscosity

Supporting Institution

GAZİ ÜNİVERSİTESİ

Project Number

06/2018-22, 2018.

Preparation of Bauxite/Deionized Water Nanofluid and Experimental Investigation of Its Thermophysical Properties

Abstract

In this study, bauxite/deionized water nanofluid was
prepared by two-step method and its thermopyhsical properties were experimentally
investigated. Bauxite was milled by high-energy spex-type ball milling attritor.
Bauxite nanoparticles with a size of 38 nm (2% by weight) and Sodium Dodecyl
Benzene Sulfonate (0.5% by weight) were doped into the deionized water while
preparing the bauxite nanofluid. Ultrasonication was applied for three hours to
obtain stable colloidal
dispersions of nanoparticles. It has been seen that the thermal characteristics
of bauxite nanofluid was better than that of deionized water. The
bauxite nanofluid has the lower surface tension and smaller contact angle than
that of base fluid. However, the thermal
conductivity and the specific heat of bauxite nanofluid increased by 8.47% and
4.4% compared to deionized water, respectively.

Keywords

Bauxite, nanofluid, thermal conductivity, viscosity

Project Number

06/2018-22, 2018.

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