Description
Unintendedair owshavebeenrecognisedasadecisivefactorwhenfocusingonmoisturedamages and durabilityinbuildingcomponents(Hens2017).Althougheortshavebeenundertakentobetter quantifyconvectivemoisturetransport(Nusser,Bednar,andTeibinger2010;Kunzel,Zirkelbach,and Schafaczek2010),IEAAnnex41closedwithacriticaloutlookonthe”deeperexploration”ofe.g. integratingair owmodels(EBC2013).Referringtothisnote,thispaperpresentsaninitialapproach howtosimulateair owsinconstructionsalong3Dpaths-tothedierenceof owsinporousmedia – suchasingapsanditsimplementationinhygrothermalsimulation. An introductoryoverviewoftheestablishedwaystomodelair owsinhygrothermalsimulationtools and currentdevelopmentsinthiseldaregiven.Takingintoaccount3Dair owsinthejointsof the insulationasinviscidincompressibleair owsprovedtobeapossibilitytomatchmeasurement data withtheresultsofacoupledheat,airandmoisture(HAM)simulation.Inthisapproach, space availabletoair owwasmodelledaspermeablecells.Aleakageinducingatimedependant pressure dierencewasmodelledasamass owsources.Thedatausedforcomparisonconsistsofan experimentwheretheeectofleakageswhenexposedtopressuredierenceshasbeeninvestigated. The comparisonoftheresultsshowthatwiththisapproachthebehaviouroftheconstructionto the pressuredierencescouldbequalitativelyrecreated.Therenementofthephysicalmodeland the experimentalinvestigationofthehygrothermalpropertiesofthegapsandjointsareidentiedas future researchtopics.
Product Details
- Published:
- 2022
- Number of Pages:
- 10
- Units of Measure:
- Dual
- Product Code(s):
- DBldgsXV-C027