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On the challenges for reliable measurements of convection in large aspect ratio Rayleigh-Bénard cells in air and sulfur-hexafluoride

Christian Cierpka - No affiliation found

2019/12/01 Full-length article DOI: 10.1016/j.expthermflusci.2019.109841 Journal: Experimental Thermal and Fluid Science

Abstract:

Highlights•Optically accessible facility for high Ra numbers using pressurized air and SF6 is presented.•Measurement error sources for stereoscopic PIV are discussed.•First time velocity measurements at fully turbulent Rayleigh-Bénard convection in air and SF6.•Turbulent superstructures can be clearly identified.