Photoacoustic Method for Measurement of Thermal Effusivity of Fe₃O₄ Nanofluid

Table 1

Thermal parameters for EG, water, and Fe₃O₄ nanofluid.

Sample	𝑃1	𝑃2	𝑃3	𝜀exp (Ws^1/2/cm^2K)	𝜀𝑅(see [18])	𝑘exp(W/cmK)	𝛼exp(cm^2/s)	𝛼𝑅 (see [19])
EG	0.0034	1.2824	1.9045	0.081	0.0817	0.0025	9.53 × 10^-4	9.66 × 10^−4
Water	0.0034	1.2824	3.4056	0.158	0.1593	0.0058	1.35 × 10^-3	1.43 × 10^−3
Fe3O4 NPs in EG	0.0034	1.2824	2.1237	0.093	—	0.003	1.04 × 10^-3	—