Search found 806 matches

by Christian Bludau
Mon Apr 22, 2019 11:30 pm -1100
Forum: WUFI 2D
Topic: Nul Graphs
Replies: 1
Views: 12

Re: Nul Graphs

Hi, you might have some convergence problems. Did the calculation run through without the residues only showing 0 for theta and phi? Please also refer to this topics: http://www.wufi-forum.com/viewtopic.php?t=332 http://www.wufi-forum.com/viewtopic.php?t=494 http://www.wufi-forum.com/viewtopic.php?t...
by Christian Bludau
Wed Apr 17, 2019 7:45 pm -1100
Forum: WUFI Pro
Topic: Heat and Moisture Flux - WUFI Pro
Replies: 1
Views: 19

Re: Heat and Moisture Flux - WUFI Pro

Hi Marko,

you can export the heat and moisture fluxes directly from WUFI Pro.
See Outputs -> ASCII-Export.
The header and format for the output can be set in Options -> Export Format

Christian
by Christian Bludau
Mon Apr 15, 2019 10:06 pm -1100
Forum: WUFI 2D
Topic: Wufi Graphs - temperature/distance
Replies: 5
Views: 2018

Re: Wufi Graphs - temperature/distance

Dear Annie, the issues of the people above are related to an older version of WUFI Graph. That is already fixed. You can output a graph for every element of the calculation grid. Do a right click in the lower left window and select the wanted result type. A new window will open, where you can select...
by Christian Bludau
Fri Apr 12, 2019 2:43 am -1100
Forum: WUFI 2D
Topic: simulating basement wall
Replies: 1
Views: 45

Re: simulating basement wall

Hi Tobaza, that right, reason is the following: Depending on the temperature gradient from the inside to the outside you get a vapor flow also from the inside to the outside. This flow is stopped at your vapor barrier and so you get 100% there. Try to do that without the vapor barrier, the moisture ...
by Christian Bludau
Mon Apr 08, 2019 10:01 pm -1100
Forum: Climate
Topic: Indoor Surface Climate
Replies: 9
Views: 136

Re: Indoor Surface Climate

No, it is not possible to export the boundary conditions with WUFI Graph at the moment. The blue boarder contains no data.
Christian
by Christian Bludau
Sun Apr 07, 2019 7:52 pm -1100
Forum: Climate
Topic: Innenklima nach WTA
Replies: 7
Views: 1032

Re: Innenklima nach WTA

Hallo Konstantin, die "neue" DIN EN ISO 13788:2013 verwendet das alte Modell mit den Feuchteklassen nur noch für Martitime Klimaten (siehe Anhang A2 in der Norm). Das ist das in WUFI unter 13788 hinterlegte. Das Modell für das kontinentale und tropische Klima (Anhang A1), das Du hier ansprichst, ent...
by Christian Bludau
Thu Mar 28, 2019 4:06 am -1100
Forum: WUFI 2D
Topic: Mould post-processor for WUFI 2D
Replies: 2
Views: 94

Re: Mould post-processor for WUFI 2D

Hi Johann,

if you generate an isopleths diagram in WUFI Graph, you can do a right click on the diagram and export directly to use in the installed post process modules:
postprocess2d.jpg
postprocess2d.jpg (44.08 KiB) Viewed 89 times

Please note: that only works if only one course is in the isopleth diagram.

Christian
by Christian Bludau
Tue Mar 26, 2019 9:51 pm -1100
Forum: Installation
Topic: Is it possible to decide and know which liquid transfer coefficient (suction & redistribution) is used in WUFI calculati
Replies: 7
Views: 235

Re: Is it possible to decide and know which liquid transfer coefficient (suction & redistribution) is used in WUFI calcu

Dear Lu, with constant boundary conditions only the redistribution is used for calculation. Speed will depend on the transfer coefficients of the boundary, diffusion/transport coefficient of you material, and also on the water content. Without more information I can not tell, if you did it properly....
by Christian Bludau
Tue Mar 26, 2019 1:14 am -1100
Forum: WUFI 2D
Topic: The speed of WUFI 2D simulations
Replies: 3
Views: 2505

Re: The speed of WUFI 2D simulations

Dear Ole, WUFI 2D 4 is able to use to use all calculation cores, what WUFI 2D 3 is not doing. So in most cases it should be faster than WUFI 2D 4. The following setting would have an high influence on the speed: - convergence criteria - number of grid elements - adaptive time step control - and othe...
by Christian Bludau
Thu Mar 21, 2019 1:33 am -1100
Forum: Material
Topic: External water repellent gypsum board
Replies: 5
Views: 170

Re: External water repellent gypsum board

Hi Johann, 1a) in WUFI you can create own userdefined materials by editing/changing an existing material, which is close to that you want. In the WUFI DB click with right mouse button on a material (e.g. external gypsum board) and select "+ New material". This way you can enter the gypsum board into...
by Christian Bludau
Wed Mar 20, 2019 2:24 am -1100
Forum: Material
Topic: External water repellent gypsum board
Replies: 5
Views: 170

Re: External water repellent gypsum board

Hi Johann, i think your way is good. Second possibility would be to build the roof with the metal cover. For that you can change the existing exterior gypsum board to fit with your values and build it into your construction followed by the roofing felt, an air layer, which you could ventilate using ...
by Christian Bludau
Tue Mar 19, 2019 9:35 pm -1100
Forum: Material
Topic: External water repellent gypsum board
Replies: 5
Views: 170

Re: External water repellent gypsum board

Hi Jóhann, the panels are used below some tiles, right? In this case the water absorption of the panels is not that important. If the producer guarantees, that it is not absorbing water, you can set it as an sd-value in the boundary conditions. Do not forget to switch off the rain water absorption, ...
by Christian Bludau
Sun Mar 17, 2019 8:57 pm -1100
Forum: Climate
Topic: Messdaten
Replies: 1
Views: 98

Re: Messdaten

Hallo Alaa,
ich würde vorschlagen, einen Datenlogger für ein Jahr in den Raum zu hängen :D

Die Steuertechnik mancher RLT-Anlagen oder auch Smart Home Systeme zeichnen manchmal solche Daten auf.

Christian
by Christian Bludau
Sun Mar 17, 2019 8:54 pm -1100
Forum: Material
Topic: Modeling Smart Vapor Retarder using moisture dependent permeability
Replies: 1
Views: 83

Re: Modeling Smart Vapor Retarder using moisture dependent permeability

Hi Kenner,

you may have to transfer the units. See here for information about doing that, they have a nice diagram on page 4:
www.builddesk.co.uk/wp-content/uploads/ ... tances.pdf

Christian
by Christian Bludau
Fri Mar 15, 2019 1:57 am -1100
Forum: Material
Topic: Materialdaten EPS 036
Replies: 1
Views: 91

Re: Materialdaten EPS 036

Hallo Guido, die Probleme kommen eventuell von der angefitteten Feuchtespeicherfunktion. Wenn es nur darum geht, die Wärmeleitfähigkeit zu verändern, dann kannst Du dir einfach ein neues Material aus dem EPS 040 erzeugen und die Wärmeleitfähigkeit, feuchteabhängig linear anpassen (also alle Werte - ...