Work

Hydrothermal performance of a turbulent nanofluid with different nanoparticle shapes in a duct fitted with various configurations of coiled-wire inserts

Year: 2023

Type: article

Abstract: This paper examines the turbulent hydrothermal performance of boehmite/water–ethylene glycol $$(\upgamma -\mathrm{AlO}(\mathrm{OH})/{\mathrm{H}}_{2}\mathrm{O}-\mathrm{EG})$$ (γ-AlO(OH)/H2O-EG) nanofluid flowing through a square duct fitted with various coiled-wire inserts (CWIs) using the finite volume method. The turbulent flow of $$\upgamma -\mathrm{AlO}(\mathrm{OH})/{\mathrm{H}}_{2}\mathrm{O}-\mathrm{EG}$$ γ-AlO(OH)/H2O-EG nanofluid is modeled using single-phase and $$k-\varepsilon$$ k-ε model. A parametric study is carried out on the effect of Reynolds number ( $$5.0\times {10}^{3}\le \mathrm{Re}\le 4.0\times {10}^{4}$$ 5.0×103≤Re≤4.0×104 ), the geometry of wire (circular, triangular, square, square-diamond, hexagon, octagon, and decagon), nanoparticle volume ratio ( $$0\le \varphi \le 4\%$$ 0≤φ≤4% ), and nanoparticle shapes (blade, brick, cylinder, platelet, and oblate-spheroid) on hydrodynamic and convective heat transfer performance (CHTP). The results showed that the combination between CWI and nanofluid enhances hydrothermal performance. For instance, among the geometries of CWI considered at $$\mathrm{Re}=5.0\times {10}^{3}$$ Re=5.0×103 , the square CWI has the highest normalized $${\mathrm{Nu}}^{\mathrm{G}}$$ NuG (referencing empty channel) of 2.58, while the decagon has the lowest value of 1.78. Furthermore, regarding the nanoparticle shapes, the platelet shape has a maximum normalized $${\mathrm{Nu}}^{\mathrm{N}}$$ NuN (referencing base fluid) of 1.53, while the oblate-spheroid has a minimum value of 0.93. Lastly, in terms of application, square and octagon wire-fitted channels are better than empty channel at low $$\mathrm{Re}$$ Re , as the values of their hydrothermal performance evaluation criteria are greater than unity.

Source: Journal of Thermal Analysis and Calorimetry

DOI: 10.1007/s10973-023-12241-x

Authors: Amro H. Al-Tohamy, Olatomide G. Fadodun, Amr Kaood

Institutions: Higher Technological Institute, Higher Technological Institute, 6th of October City, Obafemi Awolowo University, Fayoum University

Language: English

Topic: Nanofluid Flow and Heat Transfer

Subfield: Fluid Flow and Transfer Processes

Field: Chemical Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $3,590