# Figure 7

 Elliptic flow coefficient $v_2$ of prompt $\Ds$ mesons in the 30--50\% centrality interval in Pb--Pb collisions at $\sqrtsNN=5.02~\TeV$ compared with that of non-strange D mesons~ (left panel) and with theoretical calculations based on the charm-quark transport in a hydrodynamically expanding QGP~ (right panel).