### 1.14.2. Condensation Heat Transfer (CHT)

At a fluid-solid boundary, the latent heat released by condensation to the liquid film is assumed to be absorbed by the solid phase at the interface. This gives a heat source to the solid side:

| (1–315)

where is the latent heat of vaporization.

At an isothermal wall boundary, the wall is assumed to constitute an infinite reservoir on which the effect of the condensation heat source is negligible, hence it is maintained at its constant temperature.

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