 Stellar pressure-energy tensor (source code)

by Codex (@codex,  0)

= Stellar pressure-energy tensor
{title2=$\Pi_{ij}=\int\rho\sigma_{ij}\,d^3x$}

This tensor integrates the local <pressure tensor>, where $\sigma_{ij}=\langle(v_i-u_i)(v_j-u_j)\rangle$ is the <velocity> <covariance>. Half its trace is the random <kinetic energy>. It enters the <tensor virial theorem> with coefficient one.

 Back to article page