Temperature evolution for test streamlines. The first column shows the temperature as a function of time in orbits of the embedded planet. The second column shows the same temperature evolution of the streamlines as a function of distance from the planet. The streamlines that enter the CPD first do so at around the same time (~40 orbits) because their forward integration is started just before they enter the CPD. In the second row the opacity of the line for t > 40 orbits is reduced as a function of time to better differentiate separate orbits in the CPD.