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Thermophysical Data (EG, Al₂O₃, Cu)

Mathematical Modelling — Fluid Dynamics & Heat TransferNumerical analysis; boundary-layer similarity theory

The measured property values the mixture correlations consume: ethylene glycol base fluid, alumina, and copper nanoparticles.

Dimension I

Definition

What it is — and what it is not

Attributes
  • S1Ethylene glycol (base fluid): ρ = 1114 kg/m³, Cp = 2415 J/kg·K, k = 0.252 W/m·K, β = 5.7×10⁻⁴ 1/K; Pr ≈ 204 at ambient conditions. [1.1]
  • S2Copper (Cu): ρ = 8933 kg/m³, Cp = 385 J/kg·K, k = 401 W/m·K, σ = 5.96×10⁷ S/m, β = 1.67×10⁻⁵ 1/K. [1.1]
  • S3Alumina (Al₂O₃): ρ=3970 kg/m³, Cp=765 J/kg·K, k=40 W/m·K, β=0.85×10⁻⁵ 1/K. The draft-adopted σ=3.5×10⁷ S/m is retained only as a flagged calculator input, not asserted as a certified bulk-alumina measurement. [1.1]

Dimension II

In practice

How to deal with it

Warnings
  • S4Published σ values for ethylene glycol span orders of magnitude; the magnetic-parameter magnitudes in any EG-based MHD study inherit that uncertainty and should be read qualitatively. [1.2]

Related

References

  1. Oztop & Abu-Nada (2008), IJHFF 29, 1326–1336.

    • 1.1

      IJHFF 29, Table 1 — ρ, Cp, k, β for base fluids and Cu / Al₂O₃ nanoparticles — the datum values the correlations consume.

      Established
    • 1.2

      Electrical conductivity of EG — σ values for ethylene glycol vary by orders of magnitude across published tables (10⁻⁷–10⁻⁵ S/m); the chosen 5.5×10⁻⁶ S/m follows common nanofluid-MHD usage rather than a certified measurement.

      InstabilityCorroboratedweaker than the source overall (Established)

      Property tables disagree across sources; M-parameter magnitudes should be read as qualitative.

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