Efficient Modeling and Numerical Approximation of Thermodynamic Compressible Fluid Flow in Energy Networks

The authors introduce an infinite-dimensional port-Hamiltonian (pH) formulation of the compressible non-isothermal Euler equations to model temperature-dependent fluid flow in energy networks. They establish the underlying Stokes-Dirac structure, derive the boundary port variables, and incorporate energy-preserving coupling conditions to enable structure-preserving coupling of the fluid flow system with other network components.