Modulated turbulent convection: a benchmark model for large scale natural flows driven by diurnal heating

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F24%3A00587692" target="_blank" >RIV/68081731:_____/24:00587692 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/24:10494313
Result on the web
<a href="https://www.nature.com/articles/s41598-024-66882-5" target="_blank" >https://www.nature.com/articles/s41598-024-66882-5</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41598-024-66882-5" target="_blank" >10.1038/s41598-024-66882-5</a>

Result language
angličtina
Original language name
Modulated turbulent convection: a benchmark model for large scale natural flows driven by diurnal heating
Original language description
Our life is strongly affected by turbulent convective flows, driven by time-dependent thermal forcing, especially diurnal heating of the Earth’s surface by the Sun. In a laboratory experiment, we investigate their analogues: We study complex and extraordinary properties of turbulent buoyancy driven flows generated due to periodic modulation of the temperature of the plates of a Rayleigh–Bénard cell, with amplitudes both smaller and larger than either the positive or negative mean temperature difference between the top and bottom. We probe the turbulent flow of our working fluid – cryogenic helium gas – using temperature sensors placed in the cell interior and embedded in its plates. We discuss spatial and temporal structure of the heat flow, generalize validity of Nusselt versus Rayleigh number scaling Nu ∝ Raγ with γ≈1/3 at very high Ra for modulated convection and argue that this system represents a benchmark model which helps us understand the energy budget of ocean currents or weather formation on Earth subject to diurnal Sun heating as well as similar natural flows on Earth-like planets.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)

Project
<a href="/en/project/GC21-06012J" target="_blank" >GC21-06012J: Non-Oberbeck-Boussinesq effects in turbulent convection in cryogenic helium at high Rayleigh numbers</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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