Massive structures like cluster of galaxies , embedded in cosmic filaments , release enormous amount of energy through their interactions .
These events are associated with production of Mpc-scale shocks and injection of considerable amount of turbulence , affecting the non-thermal energy budget of the ICM .
In order to study this thoroughly , we performed a set of cosmological simulations using the hydrodynamical code Enzo .
We studied the formation of clusters undergoing major mergers , the propagation of merger shocks and their interaction with the filamentary cosmic web .
This interaction is shown to produce peripheral structures remarkably similar to giant radio relics observed , for example , in Abell 3376 and Abell 3667 .
We find a relatively long timescale ( about 4 Gyr ) for turbulence decay in the centre of major merging clusters .
This timescale is substantially longer than typically assumed in the turbulent re-acceleration models , invoked for explaining the statistics of observed radio halos .