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Predicting Wind Comfort in an Urban Area: A Comparison of a Regression- with a Classification-CNN for General Wind Rose Statistics
Fraunhofer, Germany.
Fraunhofer, Germany.
Fraunhofer, Sweden.
Fraunhofer, Sweden.
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2024 (English)In: Machine Learning and Knowledge Extraction, ISSN 2504-4990, Vol. 6, no 1, p. 98-125Article in journal (Refereed) Published
Abstract [en]

Wind comfort is an important factor when new buildings in existing urban areas are planned. It is common practice to use computational fluid dynamics (CFD) simulations to model wind comfort. These simulations are usually time-consuming, making it impossible to explore a high number of different design choices for a new urban development with wind simulations. Data-driven approaches based on simulations have shown great promise, and have recently been used to predict wind comfort in urban areas. These surrogate models could be used in generative design software and would enable the planner to explore a large number of options for a new design. In this paper, we propose a novel machine learning workflow (MLW) for direct wind comfort prediction. The MLW incorporates a regression and a classification U-Net, trained based on CFD simulations. Furthermore, we present an augmentation strategy focusing on generating more training data independent of the underlying wind statistics needed to calculate the wind comfort criterion. We train the models based on different sets of training data and compare the results. All trained models (regression and classification) yield an (Formula presented.) -score greater than 80% and can be combined with any wind rose statistic.

Place, publisher, year, edition, pages
Multidisciplinary Digital Publishing Institute (MDPI) , 2024. Vol. 6, no 1, p. 98-125
National Category
Civil Engineering
Identifiers
URN: urn:nbn:se:ri:diva-72980DOI: 10.3390/make6010006Scopus ID: 2-s2.0-85188879553OAI: oai:DiVA.org:ri-72980DiVA, id: diva2:1854334
Funder
Swedish Research Council Formas, 2019-0116Swedish Research Council Formas, 2019-01885Swedish National Infrastructure for Computing (SNIC), 2018-05973
Note

This work is part of the Digital Twin Cities Centre supported by Sweden’s Innovation Agency Vinnova under Grant No. 2019-00041. This work was further supported by the Swedish Research Council for Sustainable Development Formas under the grants 2019-01169 and 2019-01885. The computations were enabled by resources provided by the Swedish National Infrastructure for Computing (SNIC) at HPC2N partially funded by the Swedish Research Council through grant agreement no. 2018-05973.

Available from: 2024-04-25 Created: 2024-04-25 Last updated: 2025-09-23Bibliographically approved

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Gösta, Alexander

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