Item submerged in water

JSH · Post by **JSH** » Thu Mar 26, 2009 11:02 pm -1100

I am wondering if it would be possible to simulate an item that is partly or completely submerged in water? Is there any way to adjust the boundary conditions so it simulates something like that?

Thanks, JSH.

veitner · Post by **veitner** » Sun Mar 29, 2009 11:47 pm -1100

Hi JSH,

thats possible by generating special climatic data. For that purpose there is an excel sheet inside the tools folder of your installation. Select the generated file and apply the boundary condition to your construction.
You will find some information about the excel sheet in the "Climate"-Forum.

Veit

JSH · Post by **JSH** » Sun Mar 29, 2009 11:57 pm -1100

Hi Veit

Thank you for your answer. I know about the excel file, and i was searching for help in how the climate data should be set?

Kind regards, JSH

veitner · Post by **veitner** » Mon Mar 30, 2009 12:02 am -1100

Hi JSH,

just set the rain to sth. large (10000), the rel. humidity to one and the temperature to whatever you want (0<T<100).

Some examples can be found here:

http://www.wufi.de/wufi/demofilme_e.html

Veit.

Christian Bludau · Mon Apr 06, 2009 10:03 pm -1100

Hello JSH,
additionally you have to set the rain water absorption factor to 1 in the surface/climate conditions menu....
Greetings,
Christian

JonathonTaylor · Tue Jul 07, 2009 4:31 am -1100

I've been using this trick to study how different wall types react to flooding, and I have got some nice results.

One area I am not sure about though is cavity walls, specifically those with an air gap. When I used a material air gap, the solid walls become very wet, but nothing happens inside the air gap. While this is fine for my needs, the problem arises when I want to simulate the drying of the wall after the flood, because I would assume there is liquid moisture trapped inside the gap.

In modelling drying, I have set the RH for the flooded materials to be supersaturated. When I do this for an air gap material, the program just gives me values of 0, and in WUFI Motion it reverts to a wall I previously modelled for some reason. Should I instead create a new climate file for the inside of the wall cavity rather than using an air gap as a material? Any suggestions?

Thanks,

Jonathon

Christian Bludau · Tue Jul 07, 2009 6:54 pm -1100

Hallo Jonathan,
i think your problem is, that the air gap material has no moisture storage function, so it is not able to store/ keep water.
I think you can try two ways:
1) is to give the material a moisture storage ability by changing it in the material properties.
2) is to add a moisture source in the air gap.
The second one could be a nice way, because you are able to define the water just on the grid elements you like. The problem is the assumption and the duration of the source.
Hope I gave you an idea,
greetings,
Christian