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In recent years, the numerical simulation method has been widely applied in hydraulic and thermal calculations for hot oil pipelines. Based on the governing equations of fluid flow in hot oil pipelines, a new parallel numerical simulation method for the preheating and commissioning of hot oil pipelines is put forward. From the heat transfer mechanism of hot oil pipelines, a mathematical model on the preheating and commissioning processes of the pipelines is developed. The pipelines and their surrounding soil are discredited by a two-level model, which are the pipeline discretization and the cross-section spatial discretization, then the thermodynamic characteristic line method and the finite volume method were used respectively to discrete the governing equations. Compared with the traditional numerical method, this method can better cope with the sharp thermal transient, during the preheating and commissioning of hot oil pipelines. To improve the computational efficiency of the numerical simulation method, a parallel computing method and the matrix method are applied. Index Terms - parallel computing, numerical simulation, oil pipeline, preheating, commissioning

Parallel Computing on the Preheating and Commissioning of Hot Oil Pipelines