Deterministic Simulation of Hybrid Flow Components

Determinism plays a key role in both model verification and in achieving accurate simulation statistical results. In this paper we present a general framework for achieving determinism in the execution of hybrid simulation models. This framework guarantees that models will produce the same results irrespective to the simulation kernel they are executed. Thus, hybrid models can produce the same trace when executed in sequential or parallel machines and in this case when conservative or optimistic approaches are employed. For describing hybrid flow models we use the Heterogeneous Flow System Specification (HFSS), a hierarchical and modular formalism that can represent systems with a dynamic topology. The paper also solves the problems introduced by these systems in achieving deterministic simulations.