Unintendedair owshavebeenrecognisedasadecisivefactorwhenfocusingonmoisturedamages and durabilityinbuildingcomponents(Hens2017).Althoughe ortshavebeenundertakentobetter quantifyconvectivemoisturetransport(Nusser,Bednar,andTeibinger2010;Kunzel,Zirkelbach,and Schafaczek2010),IEAAnnex41closedwithacriticaloutlookonthe"deeperexploration"ofe.g. integratingair owmodels(EBC2013).Referringtothisnote,thispaperpresentsaninitialapproach howtosimulateair owsinconstructionsalong3Dpaths-tothedi erenceof owsinporousmedia - suchasingapsanditsimplementationinhygrothermalsimulation. An introductoryoverviewoftheestablishedwaystomodelair owsinhygrothermalsimulationtools and currentdevelopmentsinthis eldaregiven.Takingintoaccount3Dair owsinthejointsof the insulationasinviscidincompressibleair owsprovedtobeapossibilitytomatchmeasurement data withtheresultsofacoupledheat,airandmoisture(HAM)simulation.Inthisapproach, space availabletoair owwasmodelledaspermeablecells.Aleakageinducingatimedependant pressure di erencewasmodelledasamass owsources.Thedatausedforcomparisonconsistsofan experimentwherethee ectofleakageswhenexposedtopressuredi erenceshasbeeninvestigated. The comparisonoftheresultsshowthatwiththisapproachthebehaviouroftheconstructionto the pressuredi erencescouldbequalitativelyrecreated.There nementofthephysicalmodeland the experimentalinvestigationofthehygrothermalpropertiesofthegapsandjointsareidenti edas future researchtopics.
| Number of Pages : | 10 |
| Product Code(s) : | DBldgsXV-C027 |
| Published : | 2022 |
| Units of Measure : | Dual |
