SebSta: hat „FAQ General:SimulationofAbsorptionExperiment“ nach „FAQ:General:SimulationofAbsorptionExperiment“ verschoben

2013-06-13T12:29:53Z

hat „FAQ General:SimulationofAbsorptionExperiment“ nach „FAQ:General:SimulationofAbsorptionExperiment“ verschoben

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Len: Die Seite wurde neu angelegt: = (14): Simulation of Absorption Experiment = WUFI gives me the option to estimate the liquid transport coefficients Dws from the water absorption co...

2008-10-06T08:33:43Z

Die Seite wurde neu angelegt: = (14): Simulation of Absorption Experiment = WUFI gives me the option to estimate the liquid transport coefficients Dws from the water absorption co...

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= (14): Simulation of Absorption Experiment =

WUFI gives me the option to estimate the liquid transport coefficients
Dws from the water absorption coefficient. How can I check how
good this estimate is?


You can check the [[Details:LiquidTransportCoefficients | estimated]] Dws or
determine an unknown water absorption
coefficient from known Dws by simulating a water absorption experiment.


Define an initially dry layer consisting of the material in question, let it
rain on the surface (with a higher rain load than the layer can absorb to be
sure that no insufficient rain load is limiting the water uptake) and look
at the amount of water absorbed after e.g. 100 or 200 hours.


This may be done with a one-line *.KLI-file such as:
<TABLE>
<TR><TD WIDTH="14%">[h:</TD><TD WIDTH="14%">rain:</TD><TD WIDTH="14%">rad:</TD><TD WIDTH="14%">t_ext:</TD><TD WIDTH="14%">RH_ext:  </TD><TD WIDTH="14%">t_int:</TD><TD>RH_int:]</TD></TR>
<TR><TD WIDTH="14%">500</TD><TD WIDTH="14%">1000</TD><TD WIDTH="14%">0</TD><TD WIDTH="14%">20</TD><TD WIDTH="14%">1</TD><TD WIDTH="14%">20</TD><TD>0</TD></TR>
</TABLE>


The number of hours entered for the duration of this one-line climate file does not
matter since WUFI re-starts reading from the beginning of the climate file if the
simulation period extends beyond the end of the climate file.


Set the vapor diffusion thickness of the interior surface to a very high value
to prevent vapor transport through that surface.


You should perform a few test calculations in order to find a suitable thickness
of the test specimen which assures that the moisture front traverses most of the
specimen (in order to make the most efficient use of the numerical grid) but not
all of it.


[[Bild:e_BaumbergerSaug.gif]]

FAQ:General:SimulationofAbsorptionExperiment - Versionsgeschichte

SebSta: hat „FAQ General:SimulationofAbsorptionExperiment“ nach „FAQ:General:SimulationofAbsorptionExperiment“ verschoben

Len: Die Seite wurde neu angelegt: = (14): Simulation of Absorption Experiment = WUFI gives me the option to estimate the liquid transport coefficients Dws from the water absorption co...