The Second Law is treated as a constraint in a concave dual variational principle for continuum thermomechanics, with excess fields and a dissipation slack absorbing the approximate nature of constitutive laws.
Inviscid Burgers as a degenerate elliptic problem
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We demonstrate the feasibility of a scheme to obtain approximate weak solutions to the (inviscid) Burgers equation in conservation and Hamilton-Jacobi form, treated as degenerate elliptic problems. We show different variants recover non-unique weak solutions as appropriate, and also specific constructive approaches to recover the corresponding entropy solutions.
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The Second Law as a constraint and admitting the approximate nature of constitutive assumptions
The Second Law is treated as a constraint in a concave dual variational principle for continuum thermomechanics, with excess fields and a dissipation slack absorbing the approximate nature of constitutive laws.