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An inertial two-phase model of wax transport in a pipeline during pigging operations

An inertial two-phase model of wax transport in a pipeline during pigging operations
An inertial two-phase model of wax transport in a pipeline during pigging operations

Pig in pipelines performs operations for cleaning the pipe interior and internal inspection. In the past few years many 1D models have been developed to simulate the process because of their reduced computational cost; however, they rely on simplifications which are not always valid. In this paper, the results of a three-dimensional (3D) numerical investigation of the interaction between a waxy-oil and a dynamic sealing pig in a pipeline are presented. The results are obtained at a reduced computational cost by using a moving frame of reference, and an “injection” boundary condition for the wax deposited on the wall. The effect of the temperature and the wax particles’ size has been investigated. The 3D results show the structure assumed by the debris field in front of the pig. In particular, a lubrication region at the bottom of the pipe, whose dimensions are temperature dependent, is shown. This information cannot be deduced from 1D modeling. The influence of the oil on the mixture viscosity and the internal bed dynamics are discussed. This work provides insights into the interaction between the debris field in front of the pig and pipeline hydraulics.

Deposition, Modeling, Oil, Pigging, Pipeline, Wax
0301-9322
17-30
Boghi, Andrea
54a72da6-c8a2-468c-9773-897efac0638f
Brown, Lloyd
5c209177-e0d6-4bce-a2a2-77e22fbde3ac
Sawko, Robert
19466064-96ea-498f-97b8-a934fe427ddb
Thompson, Christopher P.
9ff9edd5-8056-424c-bf21-81715af0842a
Boghi, Andrea
54a72da6-c8a2-468c-9773-897efac0638f
Brown, Lloyd
5c209177-e0d6-4bce-a2a2-77e22fbde3ac
Sawko, Robert
19466064-96ea-498f-97b8-a934fe427ddb
Thompson, Christopher P.
9ff9edd5-8056-424c-bf21-81715af0842a

Boghi, Andrea, Brown, Lloyd, Sawko, Robert and Thompson, Christopher P. (2017) An inertial two-phase model of wax transport in a pipeline during pigging operations. International Journal of Multiphase Flow, 94, 17-30. (doi:10.1016/j.ijmultiphaseflow.2017.04.007).

Record type: Article

Abstract

Pig in pipelines performs operations for cleaning the pipe interior and internal inspection. In the past few years many 1D models have been developed to simulate the process because of their reduced computational cost; however, they rely on simplifications which are not always valid. In this paper, the results of a three-dimensional (3D) numerical investigation of the interaction between a waxy-oil and a dynamic sealing pig in a pipeline are presented. The results are obtained at a reduced computational cost by using a moving frame of reference, and an “injection” boundary condition for the wax deposited on the wall. The effect of the temperature and the wax particles’ size has been investigated. The 3D results show the structure assumed by the debris field in front of the pig. In particular, a lubrication region at the bottom of the pipe, whose dimensions are temperature dependent, is shown. This information cannot be deduced from 1D modeling. The influence of the oil on the mixture viscosity and the internal bed dynamics are discussed. This work provides insights into the interaction between the debris field in front of the pig and pipeline hydraulics.

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More information

Published date: 2017
Keywords: Deposition, Modeling, Oil, Pigging, Pipeline, Wax

Identifiers

Local EPrints ID: 421735
URI: https://eprints.soton.ac.uk/id/eprint/421735
ISSN: 0301-9322
PURE UUID: a79949df-7b6a-4cc1-8207-2aa7170b27f6
ORCID for Andrea Boghi: ORCID iD orcid.org/0000-0002-9387-326X

Catalogue record

Date deposited: 26 Jun 2018 16:30
Last modified: 15 Aug 2019 01:02

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Contributors

Author: Andrea Boghi ORCID iD
Author: Lloyd Brown
Author: Robert Sawko
Author: Christopher P. Thompson

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