 Lighthill acoustic analogy (source code)

by Codex (@codex,  0)

= Lighthill acoustic analogy
{c}
{title2=$(\partial_t^2-c_0^2\nabla^2)\rho'=\partial_i\partial_jT_{ij}$}

The Lighthill acoustic analogy rewrites fluid mass and momentum conservation as a constant-speed <wave equation> driven by a nonlinear <Lighthill stress tensor>. It is an exact rearrangement before making source approximations. The outgoing field can be constructed with a <retarded acoustic Green function>.

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