Multiphase flow reconstruction in oil pipelines by capacitance tomography using simulated annealing
Fuente:
Redalyc
Saved in:
| Main Author: | |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad Nacional Autónoma de México
2005
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1876473705178071040 |
|---|---|
| author | R. Martin |
| author_facet | R. Martin |
| contents | Multiphase flow reconstruction in oil pipelines by capacitance tomography using simulated annealing R. Martin C. Ortiz-Alemán A. Rodríguez Castellanos Ciencias de la Tierra image reconstruction finite volume method Capacitance tomography very fast simulated annealing A highly optimized simulated annealing (SA) algorithm is applied to reconstruct permittivity images of real two-phase gasoilflows through a cylindrical vessel using electrical capacitance tomography (ECT). ECT yields low-accuracy images but isrobust, inexpensive and much faster than many other tomography processes. This non-intrusive method essentially measures nonconductivesystem distributions and is applied in oil industry processes such as mixing or stirring vessels, fluidized bed reactors,separator tanks and pipelines carrying multiphase flows.A forward problem is solved at each step of an iterative algorithm to solve the inverse problem using simulated annealing(SA). Comparisons with linear methods like The Projected Landweber technique are discussed. In this paper we introduce a finitevolume discretization with local mesh refinements in a cylindrical configuration close to the electrodes in order to improveresolution in the calculation of capacitances, and to avoid problems with resolution at the centre of cylindrical container whenfinite differences are used. This discretization has the advantage of a conservative formulation as used in finite element methodsand features the flexibility of mesh refinement close to the electrodes. Thus, improvement of local accuracy is achieved withoutincreasing prohibitively the number of mesh points. Performance of the forward problem resolution is compared with finiteelement based methods and experimental data. We show that the non linear version of SA provides better reconstructions of threephaseflows than the Landweber method. 2005 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56844303 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.44 |
| format | Artículo científico |
| id | redalyc_56844303 |
| institution | Redalyc |
| language | en |
| publishDate | 2005 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Multiphase flow reconstruction in oil pipelines by capacitance tomography using simulated annealing R. Martin Ciencias de la Tierra image reconstruction finite volume method Capacitance tomography very fast simulated annealing Multiphase flow reconstruction in oil pipelines by capacitance tomography using simulated annealing R. Martin C. Ortiz-Alemán A. Rodríguez Castellanos Ciencias de la Tierra image reconstruction finite volume method Capacitance tomography very fast simulated annealing A highly optimized simulated annealing (SA) algorithm is applied to reconstruct permittivity images of real two-phase gasoilflows through a cylindrical vessel using electrical capacitance tomography (ECT). ECT yields low-accuracy images but isrobust, inexpensive and much faster than many other tomography processes. This non-intrusive method essentially measures nonconductivesystem distributions and is applied in oil industry processes such as mixing or stirring vessels, fluidized bed reactors,separator tanks and pipelines carrying multiphase flows.A forward problem is solved at each step of an iterative algorithm to solve the inverse problem using simulated annealing(SA). Comparisons with linear methods like The Projected Landweber technique are discussed. In this paper we introduce a finitevolume discretization with local mesh refinements in a cylindrical configuration close to the electrodes in order to improveresolution in the calculation of capacitances, and to avoid problems with resolution at the centre of cylindrical container whenfinite differences are used. This discretization has the advantage of a conservative formulation as used in finite element methodsand features the flexibility of mesh refinement close to the electrodes. Thus, improvement of local accuracy is achieved withoutincreasing prohibitively the number of mesh points. Performance of the forward problem resolution is compared with finiteelement based methods and experimental data. We show that the non linear version of SA provides better reconstructions of threephaseflows than the Landweber method. 2005 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56844303 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.44 |
| title | Multiphase flow reconstruction in oil pipelines by capacitance tomography using simulated annealing |
| topic | Ciencias de la Tierra image reconstruction finite volume method Capacitance tomography very fast simulated annealing |
| url | https://www.redalyc.org/articulo.oa?id=56844303 |