Die Suche ergab 89 Treffer
- 18 Mär 2024, 16:46
- Forum: Delphin
- Thema: Inquiry Regarding Air Permeability Simulation
- Antworten: 3
- Zugriffe: 6127
Re: Inquiry Regarding Air Permeability Simulation
Hello, The Kg value in the material data represents the air flow conductivity. It depends on the air tightness of the certain material. The only material in the Delphin database with a measured Kg is mineral wool. You can have a look there for reference values. The most other materials should have l...
- 18 Dez 2023, 15:37
- Forum: Delphin
- Thema: Dampfdiffusionsaustauschkoeffizient
- Antworten: 8
- Zugriffe: 18321
Re: Dampfdiffusionsaustauschkoeffizient
Die Kontaktbedingungen sind notwendig bei Luftschichten über größere Temperaturdifferenzen und bei belüfteten Luftschichten.
Wenn man unsicher ist kann man diese Kontaktbedingungen auch einfach immer verenden.
Wenn man unsicher ist kann man diese Kontaktbedingungen auch einfach immer verenden.
- 13 Dez 2023, 09:51
- Forum: Delphin
- Thema: Database (Materials)
- Antworten: 3
- Zugriffe: 2798
Re: Database (Materials)
Hello, This is a different error. The mwu(T) function will be created normally from existing moisture storage function. This function is only used if the ice model is switched on. You have to change the mwu(T) function directly. Do the folowing things: - open material in material editor in DELPHIN -...
- 11 Dez 2023, 15:23
- Forum: Delphin
- Thema: Database (Materials)
- Antworten: 3
- Zugriffe: 2798
Re: Database (Materials)
Hello, Some materials in our database doesn't fit the strong check rules for material data. Normally such problems does not lead to simulation problems. You can switch off the check in the solver settings - see checkbox 'Use strict material function checks'. If you switch it off the simulation will ...
- 26 Nov 2023, 21:34
- Forum: Delphin
- Thema: Inquiry regarding Porosity and Gas Phase Volume Fraction in the DELPHIN Model
- Antworten: 3
- Zugriffe: 3547
Re: Inquiry regarding Porosity and Gas Phase Volume Fraction in the DELPHIN Model
I have forwarded your request to Mr. Nicolai. He should be able to help you.
- 08 Nov 2023, 10:54
- Forum: Delphin
- Thema: Inquiry regarding Porosity and Gas Phase Volume Fraction in the DELPHIN Model
- Antworten: 3
- Zugriffe: 3547
Re: Inquiry regarding Porosity and Gas Phase Volume Fraction in the DELPHIN Model
Hello,
1. We have in a material data set two values
- porosity - this is the absolut porosity
- effective moisture content - this is the amount of pores reachable by capillary transport
2.
Yes, you are right. In presence of ice this is taken into account
Best regards
Heiko Fechner
1. We have in a material data set two values
- porosity - this is the absolut porosity
- effective moisture content - this is the amount of pores reachable by capillary transport
2.
Yes, you are right. In presence of ice this is taken into account
Best regards
Heiko Fechner
- 14 Sep 2023, 13:49
- Forum: Delphin
- Thema: Too long simulation times
- Antworten: 1
- Zugriffe: 45675
Re: Too long simulation times
Hello, First of all a DELPHIN project doesn't contain the material properties. Please attach a project package the next time. Such a package contains also materials and climate. Normally if you simulate an airflow through a structure its a good idea only to set a air pressure boundary condition at m...
- 18 Jul 2023, 09:52
- Forum: Delphin
- Thema: source AirChange for ventilated gap
- Antworten: 1
- Zugriffe: 3670
Re: source AirChange for ventilated gap
Hello Alexandra, To your questions. 1) Yes, a discretisation is necessary 2) Yes, you can use the air from the database with the higher lambda value corrsponding to the thickness of the gap. The surface coefficients can be modelled by using the ai-material-boundary contact conditions. This doesn't a...
- 18 Mai 2023, 18:43
- Forum: Delphin
- Thema: Climate Conditions Input
- Antworten: 2
- Zugriffe: 4901
Re: Climate Conditions Input
Here also a example file
- 18 Mai 2023, 18:39
- Forum: Delphin
- Thema: Climate Conditions Input
- Antworten: 2
- Zugriffe: 4901
Re: Climate Conditions Input
Hello,
best is using tsv files (tabulator separated values) with the following format
best is using tsv files (tabulator separated values) with the following format
Code: Alles auswählen
Time [unit] Value1 [unit] …
time value
Example:
time [d] temperature [C]
0 -2
0.2 -4
0.5 4
1 -1
1.4 -4
.