[ \frac\partial \rho\partial t + \frac\partial\partial x_i(\rho u_i) = 0 ]
I cannot directly generate or upload a PDF file, nor can I retrieve or link to an existing specific PDF titled "Lighthill waves in fluids" . lighthill waves in fluids pdf
[ T_ij = \rho u_i u_j + (p - c_0^2 \rho)\delta_ij - \tau_ij ] lighthill waves in fluids pdf