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Published byMerry Rich Modified over 9 years ago
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The meaning of the Second Law: Nonlocal effects in continuum physics Peter Ván BUTE, Department of Chemical Physics –Irreversibility concepts in thermodynamics –Stability and the Second Law –How to construct constitutive functions? –Example: Ginzburg-Landau equation
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–Concepts –Concepts and theories –What kind of thermodynamics?
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Second Law –time dependence –time reversal –variational principles – S exists – S is increasing –local equilibrium Can be interpreted in a thermodynamic theory Irreversibility (?)
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Thermodynamic theory Dynamic law: 1 Statics (equilibrium properties) 2 Dynamics
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1 + 2 + closed system S is a Ljapunov function of the equilibrium of the dynamic law Irreversibilitytrend to equilibrium
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Classical Irreversible Thermodynamics Local equilibrium (= there is no microstructure) Violations (nonlocality): in time (memory effects) in space (structure effects) dynamic variables ?
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Stability structureDynamic structure Example 1 for all solutions of the dynamic law relaxational dynamics
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Example 2 (Ginzburg-Landau) Liu procedure (Farkas’s lemma) state space constitutive functions
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Conclusions –Second Law is a stability criteria (Irreversibility is a kind of stability) –Second Law is a tool to construct dynamic laws –Predictive Economics (?)
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