The hybrid atomistic-continuum (HAC) method based on geometric coupling has intrinsic load imbalance under the conventional parallel decomposition. This paper presents quantitative guiding rules for alleviating load imbalance in the HAC simulation. We analyze the coupling procedures and the parallelism mechanism of the HAC method, formulate the coupling oriented load balance model and present quantitative decomposition rules for the atomistic region as well as the overlap region decomposition.

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... he results of the benchmark case show the decomposition style under the guiding rules instruction performs better than the default decomposition method. The load balance model can predict the most proper decomposition style.