Information Entropy of Liquid Metals

doi:10.1021/acs.jpcb.7b10723

Title: Information Entropy of Liquid Metals

Abstract

Correlations reduce the configurational entropies of liquids below their ideal gas limits. By means of first-principles molecular dynamics simulations, we obtain accurate pair correlation functions of liquid metals, then subtract the mutual information content of these correlations from the ideal gas entropies to predict the absolute entropies over a broad range of temperatures. We apply this method to liquid aluminum and copper and demonstrate good agreement with experimental measurements; then, we apply it to predict the entropy of a liquid aluminum–copper alloy. In conclusion, corrections due to electronic entropy and many-body correlations are discussed.

Authors:

Gao, M. C. ^[1];

^[2]

National Energy Technology Lab. (NETL), Albany, OR (United States); AECOM, Albany, OR (United States)
Carnegie Mellon Univ., Pittsburgh, PA (United States)

Publication Date:: 2018-02-20

Research Org.:: National Energy Technology Lab. (NETL), Albany, OR (United States)

Sponsoring Org.:: USDOE Office of Fossil Energy (FE)

OSTI Identifier:: 1478391

Grant/Contract Number:: SC0014506; FE0004000

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry

Additional Journal Information:: Journal Volume: 122; Journal Issue: 13; Journal ID: ISSN 1520-6106

Publisher:: American Chemical Society

Country of Publication:: United States

Language:: English

Subject:: 74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats


                    Gao, M. C., and Widom, M. Information Entropy of Liquid Metals.  United States: N. p., 2018. 
        Web.  doi:10.1021/acs.jpcb.7b10723.

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                    Gao, M. C., & Widom, M. Information Entropy of Liquid Metals.  United States.  doi:10.1021/acs.jpcb.7b10723.

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                    Gao, M. C., and Widom, M. Tue .  
        "Information Entropy of Liquid Metals".  United States.  doi:10.1021/acs.jpcb.7b10723.  https://www.osti.gov/servlets/purl/1478391.

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@article{osti_1478391,

  title        = {Information Entropy of Liquid Metals},

  author       = {Gao, M. C. and Widom, M.},

  abstractNote = {Correlations reduce the configurational entropies of liquids below their ideal gas limits. By means of first-principles molecular dynamics simulations, we obtain accurate pair correlation functions of liquid metals, then subtract the mutual information content of these correlations from the ideal gas entropies to predict the absolute entropies over a broad range of temperatures. We apply this method to liquid aluminum and copper and demonstrate good agreement with experimental measurements; then, we apply it to predict the entropy of a liquid aluminum–copper alloy. In conclusion, corrections due to electronic entropy and many-body correlations are discussed.},

  doi          = {10.1021/acs.jpcb.7b10723},

  journal      = {Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry},

  number       = 13,

  volume       = 122,

  place        = {United States},

  year         = {2018},

  month        = {2}

}

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Journal Article:

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DOI: 10.1021/acs.jpcb.7b10723

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Cited by: 5 works

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Figures / Tables:

Figure 1: (a) Radial distribution function g(r) of liquid Al at T=1000 K. (b) Contributions to the entropy of liquid Al integrated from r = 0 up to R.

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