A benchmark test for the isothermal backward-facing step flow

Chen Zhang*, Peter V. Nielsen, Laura A. Bugenings, Markus Schaffer, Rasmus Lund Jensen

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Abstract

CFD is one of the most important approaches for predicting and evaluating the airflow in the indoor environment. Although there has been a continuous improvement of computer performance and CFD technology in the past few decades, the uncertainty in CFD prediction remains high due to the user dependency on building meshes, selecting turbulence models, defining boundary conditions, and choosing numerical schemes. Benchmark tests are therefore an important approach to validate the CFD models and guide the selection of proper turbulence models under different flow regimes. This study aims to perform a benchmark test for the isothermal backward-facing step flow under different flow regimes. The benchmark test is conducted in a small-scale model and LDA is employed to identify airflow patterns. The benchmark results indicate that the SST k-ω model could be a good option to predict low turbulent flow while the Realizable k-ε and RSM models can be used for fully developed turbulent flow.
OriginalsprogEngelsk
TitelThe 16th Conference of the International Society of Indoor air, Quality & Climate : Creative and Smart Solutions for Better Built Environments, Indoor Air 2020 : Proceeding book
Antal sider6
ForlagInternational Society of Indoor Air Quality and Climate
Publikationsdato1 nov. 2020
ArtikelnummerABS-0065
ISBN (Trykt)978-171382360-5
StatusUdgivet - 1 nov. 2020
Begivenhed16th Conference of the International Society of Indoor Air Quality and Climate: Creative and Smart Solutions for Better Built Environments, Indoor Air 2020 - Virtual, Online
Varighed: 1 nov. 2020 → …

Konference

Konference16th Conference of the International Society of Indoor Air Quality and Climate: Creative and Smart Solutions for Better Built Environments, Indoor Air 2020
ByVirtual, Online
Periode01/11/2020 → …

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