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20152026
most citedExtensions to the Navier-Stokes-Fourier Equations for Rarefied Transport: Variational Multiscale Moment Methods for the Boltzmann Equation

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math.NA2026

Wigner-Eckart Factorization of the Spectral Boltzmann Collision Operator

René R. Hiemstra, Torsten Keßler, Michael R. A. Abdelmalik

We reduce the eight-dimensional weak form of the bilinear Boltzmann collision operator to a five-dimensional kinematic core by rigidly rotating the laboratory frame to align with t…