Laboratory investigation of nominally two-dimensional anabatic flow on symmetric double slopes
Creators
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1.
Technion – Israel Institute of Technology
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2.
California Institute of Technology
Abstract
We investigated the dynamics of highly turbulent thermally driven anabatic (upslope) flow on a physical model inside a large water tank using particle image velocimetry (PIV) and a thermocouple grid. The results showed that the flow exhibited pronounced variations in velocity and temperature and, importantly, could not be accurately modeled as a two-dimensional quasi-steady flow. Five significant findings are presented to underscore the three-dimensional nature of the flow, namely, the B-shaped mean velocity profiles, B-shaped turbulent flux profiles, synthetic streaks that revealed particles flowing perpendicular to the laser sheet, average vorticity maps revealing helical structure splitting, and identified vortices shooting away from the boundary toward the apex plume. Collectively, these findings offer novel insights into the flow behavior patterns of thermally driven complex terrain flows, which influence local weather and microclimates and are responsible for scalar transport, e.g., pollution.
Copyright and License
© 2023 Author(s). Published under an exclusive license by AIP Publishing.
Acknowledgement
This study was funded by the Israel Science Foundation (ISF) (Grant No. 2063/19).
Contributions
Roni Hilel Goldshmid: Conceptualization (equal); Data curation (lead); Formal analysis (lead); Funding acquisition (equal); Investigation (lead); Methodology (lead); Project administration (lead); Resources (supporting); Software (lead); Validation (lead); Visualization (lead); Writing – original draft (lead); Writing – review & editing (lead). Dan Liberzon: Conceptualization (equal); Data curation (supporting); Formal analysis (supporting); Funding acquisition (equal); Investigation (supporting); Methodology (supporting); Project administration (supporting); Resources (lead); Software (supporting); Supervision (lead); Writing – review & editing (supporting).
Data Availability
The data that support the findings of this study are available from the corresponding author upon reasonable request.
Conflict of Interest
The authors have no conflicts to disclose.
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115137_1_5.0164984.pdf
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Additional details
Identifiers
- ISSN
- 1089-7666
- DOI
- 10.1063/5.0164984
Funding
- Israel Science Foundation
- 2063/19