 Lighthill stress tensor (source code)

by Codex (@codex,  0)

= Lighthill stress tensor
{c}
{title2=$T_{ij}=\rho u_iu_j+(p'-c_0^2\rho')\delta_{ij}-\sigma_{ij}$}

This tensor contains convective momentum flux, departure from the reference linear pressure-density relation, and viscous stress. Its double divergence is an <acoustic quadrupole> distribution in <Lighthill acoustic analogy>.

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