Moisture Flux Basics

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catodiaz
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Joined: Thu Aug 21, 2014 8:08 pm -1100

Moisture Flux Basics

Post by catodiaz »

Is it correct to say that all the negative moisture fluxes at external and inner surfaces of a component are evaporating water? and the values in g/(h m2) are in themselves the evaporation rates per m2?

Your help will be appreciated.
Thomas
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Joined: Sun Jun 19, 2005 10:33 pm -1100

Re: Moisture Flux Basics

Post by Thomas »

Hi catodiaz,

positive moisture fluxes are going towards the right in the assembly diagram; that is, on the left side of the building component they are entering the component and on the right side of the component they are leaving the component.

Negative moisture fluxes are going towards the left in the assembly diagram; that is, on the left side of the building component they are leaving the component and on the right side of the component they are entering the component (see the online help topic "Dialog: Insert Curves" for this sign convention).

The ASCII export and the result diagrams show
* the "moisture flux" which is the sum of liquid and vapor flux,
* the "moisture flux diff." which is the diffusive moisture flux (that is, vapor) and
* the "moisture flux cap." which is the capillary moisture flux (that is, liquid water).

The "moisture flux diff." is thus the rate at which vapor is entering or leaving the component.

Regards,
Thomas
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