Strongly correlating liquids and their isomorphs: With applications to confined and non-equilibrium liquids

Mar 20, 2013, 4:00 PM
45m
132:028 (Nordita)

132:028

Nordita

Speaker

Mr Trond Ingebrigtsen (Roskilde University)

Description

In a series of articles [1–5] a new class of liquids was identified, namely the class of strongly correlating liquids. These liquids are characterized by having isomorphs to a good approximation. Isomorphs [4] are curves in a liquid’s phase diagram along which structure and dynamics are invariant in reduced units, as well as some thermodynamic quantities. We present here an overview of strongly correlating liquids, their isomorphs and some of the consequences of isomorphs in a liquid’s phase diagram. For instance, it has recently been shown that strongly correlating liquids have a simple thermodynamics [6] as well as simple liquid-state physics [7] . Examples of the isomorph theory are taken from: 1) Spatially confined liquids showing stratification and position-dependent relaxation processes when confined to the nano-scale. 2) Non-equilibrium liquids simulated via the SLLOD equations of motion for Couette shear flow [8]. [1] N. P. Bailey, U. R. Pedersen, N. Gnan, T. B. Schrøder, and J. C. Dyre, J. Chem. Phys. 129, 184507 (2008). [2] N. P. Bailey, U. R. Pedersen, N. Gnan, T. B. Schrøder, and J. C. Dyre, J. Chem. Phys. 129, 184508 (2008). [3] T. B. Schrøder, N. P. Bailey, U. R. Pedersen, N. Gnan, and J. C. Dyre, J. Chem. Phys. 131, 234503 (2009). [4] N. Gnan, T. B. Schrøder, U. R. Pedersen, N. P. Bailey, and J. C. Dyre, J. Chem. Phys. 131, 234504 (2009). [5] T. B. Schrøder, N. Gnan, U. R. Pedersen, N. P. Bailey, and J. C. Dyre, J. Chem. Phys. 134, 164505 (2011). [6] T. S. Ingebrigtsen, L. Bøhling, T. B. Schrøder, and J. C. Dyre, J. Chem. Phys. 136, 061102 (2012). [7] T. S. Ingebrigtsen, T. B. Schrøder, and J. C. Dyre, Phys. Rev. X 2, 011011 (2012). [8] L. Separdar, N. P. Bailey, T. B. Schrøder, S. Davatolhagh, and J. C. Dyre, arXiv 1, 1212.4480v1 (2012).

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