sample type

Φ(ξ)

C/C₀

measuring sample

with heat transfer by the thermal conductivity

Φ(ξ) = ξ,

3.3

Φ(ξ) = exp(ξ),

3.3

model sample

with heat transfer by the liquid evaporating and vapour condensing

Φ(ξ) = ξ,

9.5

Φ(ξ) = exp(ξ),

11.8