Search found 37 matches

by james bertram
Mon Nov 21, 2016 2:54 pm -1100
Forum: Material
Topic: Temperature dependent thermal conductivity
Replies: 4
Views: 9048

Re: Temperature dependent thermal conductivity

Thomas - thank you for taking the time to explain further.

Your response clarifies all.

Best wishes
James
by james bertram
Mon Nov 21, 2016 2:02 pm -1100
Forum: Climate
Topic: KLI FILE
Replies: 19
Views: 42626

Re: KLI FILE

Thanks Christian - been trying to understand what happens to a wall assembly under ISO 9705 testing...called the full room test because you line a 3.6 x 2.4 x2.4m room and turn on the burner. Temp vary a fair bit, but at the hot end they can reach 1000C. Been are really useful learning experience, e...
by james bertram
Wed Nov 16, 2016 3:26 pm -1100
Forum: Climate
Topic: KLI FILE
Replies: 19
Views: 42626

Re: KLI FILE

Ahh! Thank you learned person :D ...but one more question please. The "Temp Transport Calc" simulation appears to run ok, but when I add "Moisture Transport Calc" the temp outcomes appear not to respond? Is this because the temp range (up to 1000) is outside the accepted range fo...
by james bertram
Wed Nov 16, 2016 2:15 pm -1100
Forum: Material
Topic: Temperature dependent thermal conductivity
Replies: 4
Views: 9048

Re: Temperature dependent thermal conductivity

Hello Thomas - an erudite answer as always...thank you. But I am still a bit :? Does this mean that the temp values shown on the "Thermal Conductivity, temperature dependent" table and graph are determined by the method of calculation: 1 "Mean value" = temp values are mean values...
by james bertram
Tue Nov 15, 2016 11:10 pm -1100
Forum: Material
Topic: Temperature dependent thermal conductivity
Replies: 4
Views: 9048

Temperature dependent thermal conductivity

Guten morgen Fraunhofer people :) I have been researching temperature effects on thermal conductivity of building materials (paper released by Building Science Corp in US), and this led me to to have a look at the option for temp effects on thermal conductivity. Available thermal conductivity data s...
by james bertram
Tue Nov 15, 2016 10:45 pm -1100
Forum: Climate
Topic: KLI FILE
Replies: 19
Views: 42626

Re: KLI FILE

Guten morgen Fraunhofer people :) I have been using a kli file to simulate wall performance using fire test data. The test runs for 20 minutes and records temp at 5 second intervals. A couple of questions please: 1 KLI file inputs - is the time sequence 0.00, 0.05.....0.55, 0.60 etc or 0.55, 1.00, 1...
by james bertram
Mon Aug 08, 2016 1:44 pm -1100
Forum: Material
Topic: Simulating concrete - 1) initial drying then 2) ongoing behaviour
Replies: 6
Views: 9673

Re: Simulating concrete - 1) initial drying then 2) ongoing behaviour

Danke Christrian - for the detailed response...much appreciated, was :? , now :D

Best wishes to everyone from the far side of the world, James
by james bertram
Thu Aug 04, 2016 2:27 pm -1100
Forum: Material
Topic: Simulating concrete - 1) initial drying then 2) ongoing behaviour
Replies: 6
Views: 9673

Re: Simulating concrete - 1) initial drying then 2) ongoing behaviour

Hello Manfred - Thank you for your response, I hope you are enjoying America. I am trying to make sure I understand "how wufi thinks 8) For example (for concrete), if I only use Temp/RH data because the slab is covered above, can I leave Liquid Trans Coeff settings as they are because there is ...
by james bertram
Wed Aug 03, 2016 8:59 pm -1100
Forum: Material
Topic: Simulating concrete - 1) initial drying then 2) ongoing behaviour
Replies: 6
Views: 9673

Re: Simulating concrete - 1) initial drying then 2) ongoing behaviour

G'day Christian- thanks for your reply... :D To check that I understand...if there is no sun or rain exposure (building above) can I just use Temp and RH data for the Boundary Conditions and leave the Liquid Transport Coeff as they are for Concrete wc=0.5. That is, if I don't provide data, does WUFI...
by james bertram
Wed Aug 03, 2016 3:17 pm -1100
Forum: Material
Topic: Simulating concrete - 1) initial drying then 2) ongoing behaviour
Replies: 6
Views: 9673

Simulating concrete - 1) initial drying then 2) ongoing behaviour

Guten morgen Fraunhofer 8) I have read all the concrete posting I can find, but have a question about the transition from 1) to 2) below. 1) Initial drying - for site poured concrete, in one posting using RH=97% approx as the Initial Conditions and "Concrete w/c 0.5" was suggested. 2) Ongo...
by james bertram
Thu Jul 21, 2016 7:16 pm -1100
Forum: General
Topic: Modeling of Floor Constructions in WUFI
Replies: 9
Views: 21273

Re: Modeling of Floor Constructions in WUFI

Thank you Christian :wink:
by james bertram
Thu Jul 21, 2016 7:03 pm -1100
Forum: General
Topic: Modeling of Floor Constructions in WUFI
Replies: 9
Views: 21273

Re: Modeling of Floor Constructions in WUFI

G'day Christian - apologies for the confusion, the suspended concrete slab has an open carpark below and an office above - it is not connected to the ground.

Thanks, James :)
by james bertram
Wed Jul 20, 2016 3:58 pm -1100
Forum: General
Topic: Modeling of Floor Constructions in WUFI
Replies: 9
Views: 21273

Re: Modeling of Floor Constructions in WUFI

...opps forgot to tick the "notify me" box...
by james bertram
Wed Jul 20, 2016 3:58 pm -1100
Forum: General
Topic: Modeling of Floor Constructions in WUFI
Replies: 9
Views: 21273

Re: Modeling of Floor Constructions in WUFI

Good morning I have read Christian's comments below and would like to check that I am modelling a first floor suspended concrete slab in an office building correctly (ground = unenclosed car parking, storeys above = office space). I am use three stages: 1) Pour to 3 month - to allow for some constru...
by james bertram
Wed Jul 20, 2016 3:16 pm -1100
Forum: WUFI Pro
Topic: Initial conditions from file data
Replies: 2
Views: 6085

Re: Initial conditions from file data

Hello Thomas - good to hear from you...and thank you for the detailed response.