  The heavy quarks (HQs) are unique probe of the hot QCD matter properties and
their dynamics is coupled to the locally thermalized expanding quark gluon
plasma. We present here a novel study of the event by event correlations
between light and heavy flavour flow harmonics at LHC energy within a transport
approach. Interaction between heavy quarks and light quarks have been taken
into account exploring the impact of different temperature dependence of the
transport coefficients $D_s$ and $\Gamma$. Our study indicates that
$v^{heavy}_n-v^{light}_n$ correlation and the relative fluctuations of
anisotropic flows, $\sigma_{v_{n}}/\langle v_n \rangle$, are novel observables
to understand the heavy quark-bulk interaction and are sensitive to the
temperature dependence even to moderate differences of $D_s(T)$, or
$\Gamma(T)$. Hence a comparison of such new observables for HQ to upcoming
experimental data at both RHIC and LHC can put further constraints on heavy
quark transport coefficients and in particular on its temperature dependence
toward a solid comparison between the phenomenological determination and the
lattice QCD calculations.
