How to model a moisture sink

Everything concerning hygrothermal Sources & Sinks within the assembly
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David Lam
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Joined: Fri Dec 06, 2019 7:06 am -1100

How to model a moisture sink

Post by David Lam » Tue May 18, 2021 7:48 am -1100

Hi all
I had a good search in the forum and couldn't find an answer to what I thought would be simple (easy and complex right?!).

I want to model a cavity drain to see the impact that a moisture sink has.
Reading around it looks like I need to enter a Moisture Source with a negative value. However this does not seem possible.

I was expecting to be able to enter in the box in the screenshot below but this doesn't work. Can you help please?
Screenshot 2021-05-18 194753.jpg
Screenshot 2021-05-18 194753.jpg (59.04 KiB) Viewed 839 times

Thomas
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Re: How to model a moisture sink

Post by Thomas » Tue May 18, 2021 11:18 am -1100

Hi David,

the monthly moisture loads are meant to be a challenge for the drying potential of the building component and therefore accept only positive source strengths.

To define a moisture source with negative source strength, please use the option "Transient from File". The help file explains the format of a user-provided source strength file.

Kind regards,
Thomas

David Lam
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WUFI User
Posts: 7
Joined: Fri Dec 06, 2019 7:06 am -1100

Re: How to model a moisture sink

Post by David Lam » Tue May 18, 2021 9:44 pm -1100

Wonderful.
Thank you.

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