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PROJECT TOPIC:  COMPUTATIONAL FLUID DYNAMICS OF HIGLY TRANSIENT FLOWS IN PIPELINES
Department:  Mechanical Engineering
AMOUNT:  10000
FORMAT:   MS WORD
PAGES:  111
 
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ABSTRACT

This project work seeks to evaluate the CFD Simulation of Highly Transient Flows.The project describes the fundamental extension and extensive testing of a robust CFD model for predicting outflow following the failure of pressurized hydrocarbon pipelines. The main thrust of the study involves the extension of the basic outflowmodel to account for complex pipeline systems, improvements of the theoretical basis and numerical stability.The basic model, based on the numerical solution of conservation equations using the method of characteristics, incorporates a suitable equation of state to deal withpipelines containing pressurized multi-component hydrocarbon mixtures. It utilizesthe homogeneous equilibrium flow (HEM) assumption, where the constituent phases in a two-phase mixture are assumed to be at thermal and mechanical equilibrium. The first part of the study focuses on the development of an outflow model to simulate the failure of multi-segment pipelines incorporating valves and fittings passing through terrains of different inclinations. In the absence of real data, the numerical accuracy of the model is assessed based on the calculation of a mass conservation index. The results of a case study involving the comparison of the simulated outflow data based on the failure of a multi-segment pipeline as opposed to an equivalent single segment pipeline containing gas, liquid or two-phase inventories are used to highlight the impact of pipeline complexity on the simulated data.

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