Table 3 Shape-factor worth for different molecules shape.

From: The improved thermal efficiency of Prandtl–Eyring hybrid nanofluid via classical Keller box technique

Nanoparticles type

Shape

Size (\(m\))

Sphericity

Sphere

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3

1.0

Hexahedron

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3.7221

0.87

Tetrahedron

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4.0613

0.82

Column

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6.3698

0.61

Lamina

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16.1576

0.33