Turbulent Rayleigh-Bénard convection of compressed gas: effect of sidewall thermal conductance

International Journal of Heat and Mass Transfer（2022）

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摘要

•Turbulent Rayleigh-Bènard convection is experimentally studied.•Need for sidewall conductance correction on Nu is eliminated using a novel method.•Sidewall-corrected Nusselt number is found to correlate with Ra as: Nu=0.0426Ra0.352.•Experimental data are found to be closely following the classical Nu∼Ra1/3 scaling.

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关键词

Rayleigh-Bénard convection,Nusselt number,Compressed gas experiments,Central-heater-based technique,Aspect ratio,Sidewall conductance,Semi-analytical models

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