liquid transport coefficients

[Michel]

Wufi uses two liquid transport coefficient for suction and redistribution.
I understand the following: When it rains, the coefficient for suction is used. As soon as it stops raining, the other one is used whatever the water content. When the drying of a fully saturated material is computed, the coefficient for redistribution is used whereas the water flows if the bigger pores at the begining.
As the rain time is usually much shorter than the non rain time, the redistribution transport coefficient seems to be the most important in practice.
The initial absorption coefficient allows to estimate the transport coefficient in succion. How is it possible to estimate the redistribution transport coefficient which is so important? A conventional drying curve is not easy to understand because there is the influence of the surface exchange coefficients and the change of the transport coefficients. How is it possible to measure this value in a simple way? Thank you

[Manfred Kehrer]

Dear Michel,

please see here:
http://www.wufi-forum.com/viewtopic.php?t=301

but we work on a better estimation right now