WUFI

Hello, In Wufi materials database, the vapor retarders have their porosity set to an arbitrary value (eg 0.001) in order to represent their low porosity. We want to represent the behavior of the rain shield Delta-Vent N/S (Doerken) between two materials layers but we don't know its porosity. We see ...

Hello, How to represent a rain shield wich is not located on the outer surface but between two layers of materials We think proceed as that : - We will use the same method as for vapor retarders to determine an effective menbrane. - We don't know the heat capacity (we wait a manufacturer answer) we ...

Hi, We want to use a BBS panel (Binderholz) and we don't know how to represent it with the Wufi Matérial Database. This product can be composed of differents species of wood, moreover we don't know if the mu value of 70 is a dry value. We don't know how to represent liquid transport, even with a mu ...

Hi,

We want to change the computer (where WUFI is installed) by a more performant one.

What is the procedure :

- We uninstall WUFI from the old computer,

- We install WUFI on the new computer,

- What should we do to inform you... ?

Thanking you by advance.

Greetings.

Hello,

Thank you very much,

Greetings.

Hello, We want to use straw balls in a wall, We obtain the moisture storage function from the CSTB (France) RH Kg/m3 0 0 0.1 2.6 0.3 6.1 0.6 9.8 0.8 12 0.98 33 1 100 a bulk density of 100 kg/m3 a porosity of 0.88 m3/m3 a heat capacity of 2000 J/kg.K a heat conductivity dry 0.045 W/m.K a diffusion re...

Hello, In Help/Backgroud we see profiles of water content in the cross-section of wall with abscissa values. Is it possible to make that kind of graph with WUFI 2D ? The only way we find to do that is to make a screen shot of wufi motion in pause (paint) but we don't have any value on abscissa to se...

Hello,

What happens when we tick the box wind dependent and how Wufi use the heat transfert coefficient value ?

What kind of value we should enter to use with wind dependent. (10 ?)

Thanking you by advance.

Greetings.

Hello,

Thank you for all that information which will enable me to approach the behavior of the MFP.

Greetings.

Hello,

Thank you for this clarification.

Greetings.

Hello, We want to use a Multifonctions pannel Wodego (MFP) with moisture resistant glue. We tried to obtain the material properties for hygrothermal calculation but it is very hard to find. We want to use a MFP pannel with a density of 680 kg/m3 (22mm), a thermal conductivity of 0.13 W/m.K and a dry...

Hello, We use the rules RT2005 TH-U - Fascicule 2 (France) to determine some materials properties. We find two values of the density : - dry density - nominal density We supposed that the bulk density is a dry density and the nominal density is the density with the typical built-in moisture. Are we ...

Hi, In the help / Basic Material data / diffusion resistance factor dry It is said that when w=wmax (capillaries clogged) there is no vapor transport thus mu=0 Or mu is defined to represent how much the diffusion resistance factor is higher than that of a stagnant air. (diffusion resistance of mater...

Help Basic material data / Diffusion resistance factor Please note that even if you do not explicitly use a moisture-dependent ?-value, WUFI will treat it as moisture-dependent for moisture contents above free saturation wf. WUFI will reduce it in proportion to the moisture excess over wf, until it ...