Balance Systems and the Variational Bicomplex

Details Balance Systems and the Variational Bicomplex Balance Systems and the Variational Bicomplex

2011-01-27

arxiv.org/abs/1101.5375v2

SIGMA 7 (2011), 063, 18 pages

Physics

Mathematical Physics

Scientific paper

10.3842/SIGMA.2011.063

In this work we show that the systems of balance equations (balance systems) of continuum thermodynamics occupy a natural place in the variational bicomplex formalism. We apply the vertical homotopy decomposition to get a local splitting (in a convenient domain) of a general balance system as the sum of a Lagrangian part and a complemental "pure non-Lagrangian" balance system. In the case when derivatives of the dynamical fields do not enter the constitutive relations of the balance system, the "pure non-Lagrangian" systems coincide with the systems introduced by S. Godunov [Soviet Math. Dokl. 2 (1961), 947-948] and, later, asserted as the canonical hyperbolic form of balance systems in [M\"uller I., Ruggeri T., Rational extended thermodynamics, 2nd ed., Springer Tracts in Natural Philosophy, Vol. 37, Springer-Verlag, New York, 1998].

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