Side wall effects in Rayleigh Bénard experiments
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In Rayleigh Bénard experiments, the side wall conductivity is traditionally taken into account by subtracting the empty cell heat conductivity from the measured one. We present a model showing that the correction to apply could be considerably larger. We compare to experiments and find good agreement. One of the consequences is that the Nusselt behavior for Ra < 1010 could be closer to Nu∝Ra1/3 than currently assumed. Also, the wall effect can appear as a continuous change in the γ exponent Nu∝Raγ.
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