Wet Surface

This node should be used to model evaporation from and condensation to a solid surface completely covered with liquid water. It adds the evaporation flux to the boundary conditions of Equation of Moist Air (MT Interface) node, and computes the corresponding latent heat source to be added in the heat transfer equation.

It can be applied on the exterior boundaries of a domain where the Moist Air (MT Interface) node is active.

The evaporation flux gevap (SI unit: kg/(m2⋅s)) is defined as:

where Mv is the molar mass of water vapor (SI unit: kg/mol), K is the evaporation rate factor (SI unit: m/s), csat is the saturation concentration of vapor (SI unit: mol/m3), and cv is the vapor concentration (SI unit: mol/m3).

The latent heat source qevap (SI unit: W/m2) is obtained by multiplying the evaporation flux by the latent heat of evaporation Lv (SI unit: J/kg):

Wet Surface Settings

Enter a value or expression for the K.


	See Moist Surface node for the computation of the amount of liquid water accumulated on a solid surface partially covered with liquid water, due to evaporation and condensation.


	When a Heat and Moisture multiphysics coupling node is active, the resulting latent heat source is automatically added as a boundary heat source into the heat transfer equation.


	Evaporative Cooling of Water: Application Library path Heat_Transfer_Module/Phase_Change/evaporative_cooling

Location in User Interface

Context Menus

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