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If Relative humidity is selected (the default), set the External relative humidity, ϕw,ext, and the External temperature, Text (used for the computation of the vapor saturation pressure). For User defined, enter values or expressions. Else, select an Ambient relative humidity and an Ambient temperature defined in an Ambient Properties node under Definitions. Convective moisture flux is defined by
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If Partial vapor pressure is selected, enter an External partial vapor pressure, pv,ext. Convective moisture flux is defined by
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) and select Advanced Physics Options in the Show More Options dialog.
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In the COMSOL Multiphysics Reference Manual:
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