## 2.3. Parallelization of Unstructured Calculations

As the numbering of nodes/elements of the unstructured solvers does not adhere to the same restrictions as the structured solvers, the parts cannot be simply decomposed by I, J, K index lines. The decomposition is done in a similar manner to SPH calculations. Virtual work units are applied to the model and the work done in each work unit is evaluated. A recursive bisection method is then applied in order to effectively load balance the model. The amount of communication between processors is minimized but this is a secondary consideration compared to the load balancing. This method is completely automatic and requires a minimal amount of information from the user.

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