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Stochastic simulation of rain intrusion through small defects due to water rivulet overpressure. Introducing a driving rain leakage potential
Chalmers University of Technology, Sweden.
RISE Research Institutes of Sweden, Built Environment, Building and Real Estate.ORCID iD: 0000-0003-4211-4885
2021 (English)In: 'Journal of Physics: Conference Series , IOP Publishing Ltd , 2021, Vol. 2069, no 1Conference paper, Published paper (Refereed)
Abstract [en]

There is a need of upgrading the old building stock with respect to the thermal insulation of the building envelope and specifically the façades. There are several systems on the market, and some are quite new and innovative. To bring down the cost some of the systems many are based on prefabricated moisture tight insulated units. This means that in case there is moisture tight barrier on the interior side, two moisture tight barriers surround the wall structure. The leakage of driving rain into the structure then represents a major threat to the durability of these systems. This paper investigates the pressure build up in water rivulets running down a façade acting together with the wind pressure. A driving rain leakage potential is introduced. Using real weather data years and Monte Carlo Simulations, the mean and standard deviation of the annual leakage through small hole is estimated. The examples show that the leakage can reach a level 0-0.5 liter/year for a hole with a diameter of 1-2 mm, and 0.5-3 liter/year for a diameter of 3-4 mm.

Place, publisher, year, edition, pages
IOP Publishing Ltd , 2021. Vol. 2069, no 1
Keywords [en]
Intelligent systems, Monte Carlo methods, Rain, Stochastic models, Stochastic systems, Structural dynamics, Thermal insulation, Wind effects, %moisture, Building envelopes, Building stocks, Driving rain, Old buildings, Overpressure, Pressure build up, Stochastic simulations, Wall structure, Water rivulets, Moisture
National Category
Building Technologies
Identifiers
URN: urn:nbn:se:ri:diva-57500DOI: 10.1088/1742-6596/2069/1/012052Scopus ID: 2-s2.0-85121464106OAI: oai:DiVA.org:ri-57500DiVA, id: diva2:1623763
Conference
8th International Building Physics Conference, IBPC 2021, 25 August 2021 through 27 August 2021
Available from: 2021-12-30 Created: 2021-12-30 Last updated: 2023-05-25Bibliographically approved

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Olsson, Lars

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  • apa
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