Speed-Dependent Weighting of the Maxwellian Distribution in Rarefied Gases: A Second-Law Paradox?

Denur, Jack

doi:10.1007/s10701-007-9160-6

Cited by 2 publications

(2 citation statements)

References 30 publications

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“…Gordon [39][40][41][42] and J. Denur [43][44][45][46]. By the mid-1990s, the number and variety of challenges mushroomed as multiple research teams entered the field, includingČápek et al [47][48][49][50][51][52][53][54][55][56][57][58][59][60][61], Allahverdyan and Nieuwenhuizen [62][63][64][65][66], Berger [67,68], Crosignani et al [69][70][71][72][73], Keefe [74][75][76], Nikulov and Dubonos et al [77][78][79], and Miller [80].…”

Section: Second Law Challengesmentioning

confidence: 99%

Infrared Cloaking, Stealth, and the Second Law of Thermodynamics

Sheehan

2012

Entropy

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Infrared signature management (IRSM) has been a primary aeronautical concern for over 50 years. Most strategies and technologies are limited by the second law of thermodynamics. In this article, IRSM is considered in light of theoretical developments over the last 15 years that have put the absolute status of the second law into doubt and that might open the door to a new class of broadband IR stealth and cloaking techniques. Following a brief overview of IRSM and its current thermodynamic limitations, theoretical and experimental challenges to the second law are reviewed. One proposal is treated in detail: a high power density, solid-state power source to convert thermal energy into electrical or chemical energy. Next, second-law based infrared signature management (SL-IRSM) strategies are considered for two representative military scenarios: an underground installation and a SL-based jet engine. It is found that SL-IRSM could be technologically disruptive across the full spectrum of IRSM modalities, including camouflage, surveillance, night vision, target acquisition, tracking, and homing.

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Section: Second Law Challengesmentioning

confidence: 99%

Infrared Cloaking, Stealth, and the Second Law of Thermodynamics

Sheehan

2012

Entropy

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“…The general class of recent challenges spans classical/standard [29,30,31,32,33,34,35,36,37,38,39,40,41,42], plasma [43,44,45], chemical [46,47,48,49], gravitational [50,51,52,53], solid state [54,55,56] and quantum physics [57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,…”

Section: The Quest For Violationmentioning

confidence: 99%

The peculiar status of the second law of thermodynamics and the quest for its violation

D’Abramo

2012

Studies in History and Philosophy of Science Part B: Studies in

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Even though the second law of thermodynamics holds the supreme position among the laws of nature, as stated by many distinguished scientists, notably Eddington and Einstein, its position appears to be also quite peculiar. Given the atomic nature of matter, whose behaviour is well described by statistical physics, the second law could not hold unconditionally, but only statistically. It is not an absolute law. As a result of this, in the present paper we try to argue that we have not yet any truly cogent argument (known fundamental physical laws) to exclude its possible macroscopic violation. Even Landauer's information-theoretic principle seems to fall short of the initial expectations of being the fundamental 'physical' reason of all Maxwell's demons failure. Here we propose a modified Szilard engine which operates without any steps in the process resembling the creation or destruction of information. We argue that the information-based exorcisms must be wrong, or at the very least superfluous, and that the real physical reason why such engines cannot work lies in the ubiquity of thermal fluctuations (and friction).We see in the above peculiar features the main motivation and rationale for pursuing exploratory research to challenge the second law, which is still ongoing and probably richer than ever. A quite thorough (and critical) description of some of these challenges is also given.

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Speed-Dependent Weighting of the Maxwellian Distribution in Rarefied Gases: A Second-Law Paradox?

Cited by 2 publications

References 30 publications

Infrared Cloaking, Stealth, and the Second Law of Thermodynamics

Infrared Cloaking, Stealth, and the Second Law of Thermodynamics

The peculiar status of the second law of thermodynamics and the quest for its violation

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