2.6.7 PLM scheme with vanLeer slope-limiter

**Figure 20:** Stencil and example for PLM scheme with vanLeer slope-limiter.
$\includegraphics[width=8.0cm]{images/pde1d_stencil_mm0p.ps}$ $\includegraphics[width=8.0cm]{images/pde1d_solve_linadv_spikes_vanleer_i200n500dt04.ps}$

Figure 20: PLM scheme with vanLeer slope (harmonic mean of slopes),

$\begin{displaymath} \delta \! \rho_i = \left\{ \begin{array}{ll} \frac{1}{\fr... ... 0 \\ 0 & \mbox{elsewhere} \end{array} \right. \enspace . \end{displaymath}$

(156)