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    Characterisation of Slug Flow Conditions in Pipelines for Fatigue Analysis

    Access Status
    Fulltext not available
    Authors
    Reda, A.
    Forbes, Gareth
    Sultan, I.
    Date
    2011
    Type
    Conference Paper
    
    Metadata
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    Citation
    Reda, Ahmed M. and Forbes, Gareth L. and Sultan, Ibrahim A. 2011. Characterisation of Slug Flow Conditions in Pipelines for Fatigue Analysis, 30th International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2011), Jun 19 2011. Rotterdam, Netherlands: American Society of Mechanical Engineers (ASME).
    Source Title
    Proceedings of the ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
    Source Conference
    30th International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2011)
    School
    Department of Mechanical Engineering
    URI
    http://hdl.handle.net/20.500.11937/8004
    Collection
    • Curtin Research Publications
    Abstract

    Understanding the problem of slug flow induced fatigue damage is of particular importance to the reliable operation of pipelines. Slug flow across unsupported pipeline spans, pipeline crossings or vertical engineered buckle initiators, i.e. sleepers, produces dynamic motion in the pipeline resulting in cyclic fatigue stresses. In some cases, the dynamic effects will cause the pipeline to fail at a point of stress concentration. In other cases, however, these effects may be negligible. The current literature provides no guidance as to when the dynamic effects of slug flow must be considered. This paper gives guidance and describes how fatigue due to slug flow in pipelines, which would normally require dynamic analysis, can be quantified using simplified quasi-static analysis. The paper also presents a design process which could be used by pipeline engineers to determine the level of analysis needed, before embarking on more complex and expensive dynamic finite element analysis.

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    • Characterization of Dynamic Slug Flow Induced Loads in Pipelines
      Reda, Ahmed; Forbes, Gareth; Sultan, I. (2012)
      The flow of a liquid mass, i.e. a ‘slug’, inside thin-walled spanning pipelines, produces a lateral traversing force. This moving force initiates dynamic stresses within the structure and is often critical when assessing ...
    • A Surrogate Model for Evaluation of Maximum Normalized Dynamic Load Factor in Moving Load Model for Pipeline Spanning due to Slug Flow
      Sultan, I.; Reda, Ahmed; Forbes, Gareth (2012)
      Understanding the problem of slug-flow-induced fatigue damage is of particular importance to the reliable operation of pipelines. Slug flow, across unsupported pipeline spans, produces dynamic vibrations in the pipeline ...
    • Vibration of a curved subsea pipeline due to internal slug flow
      Reda, Ahmed; Forbes, Gareth; McKee, Kristoffer; Howard, Ian (2014)
      Subsea oil and gas pipelines undergo vibration due to "slug" flow within the internal fluid contents of the pipeline. This slug flow is generated by the differences in density of the internal fluid. It acts as a traversing ...
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