Propagation and interference of thermal waves in turbulent thermal convection

0573544 - ÚPT 2024 RIV US eng J - Journal Article
Urban, Pavel - Králík, Tomáš - Musilová, Věra - Schmoranzer, D. - Skrbek, L.
Propagation and interference of thermal waves in turbulent thermal convection.
Physical Review Fluids. Roč. 8, č. 6 (2023), č. článku 063501. ISSN 2469-990X. E-ISSN 2469-990X
R&D Projects: GA ČR(CZ) GA20-00918S
Institutional support: RVO:68081731
Keywords : turbulent thermal convection * thermal waves * interference of thermal waves
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 2.7, year: 2022
Method of publishing: Limited access
https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.8.063501

We report investigation of thermal waves in harmonically modulated turbulent thermal convection in a Rayleigh-Bénard cell. We probe the thermal waves in the working fluid cryogenic helium gas by temperature sensors placed in the cell and embedded in the plates. We observe propagation and interference of two coherent thermal waves and describe their behavior in terms of models that explain the weak attenuation and apparent superposition of thermal waves in the bulk, accounting for the temperature profile of convective turbulent flow via a spatially dependent effective thermal diffusivity.
Permanent Link: https://hdl.handle.net/11104/0343974