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Description:
We extend the Multi-Level Monte Carlo (MLMC) algorithm of [19] in order to quantify uncertainty in the solutions of multi-dimensional hyperbolic systems of conservation laws with uncertain initial data. The algorithm is presented and several issues arising in the massively parallel numerical implementation are addressed. In particular, we present a novel load balancing procedure that ensures scalability of the MLMC algorithm on massively parallel hardware. A new code ALSVID-UQ is described and applied to simulate uncertain solutions of the Euler equations and ideal MHD equations. Numerical experiments showing the robustness, effciency and scalability of the proposed algorithm are presented.