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Flaw in Duncan’s Paradox

Gokaran Shukla

Sheehan recently discussed the possibility of existence of dynamically controlled pressure or temperature gradient in black body cavity. Duncan proposed that if this pressure gradient exist and can be measured in laboratory then it will violate the 2nd law of thermodynamics. Sheehan et al. performed black body cavity experiment by using tungsten and rhenium metals, H2 and as reactants in gas surface interface reaction and claim that they have indeed measured the temperature difference (equivalent to the pressure difference according to their definition). In this paper we will discuss about the flaw that exist in Duncan’s paradox and in Sheehan analysis. We will show that 2nd law of thermodynamics is still valid in their experiment.