Two-dimensional treesph simulations of choked flow systems
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| Format: | Artículo científico |
| Langue: | en |
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Sociedad Mexicana de Física A.C.
2005
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| _version_ | 1876448958564270080 |
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| author | J. Klapp |
| author_facet | J. Klapp |
| contents | Two-dimensional treesph simulations of choked flow systems J. Klapp L. Di G. Sigalotti S. Galindo E. Sira Física, Astronomía y Matemáticas SPH choked flow compressible flow numerical particle metnods It is well-known that the flow of gas, liquid, and their mixtures through restrictors installed in pipeline systems is of great practical importancein many industrial processes. In spite of its significance, numerical hydrodynamics simulations of such flows are almost non-existent in theliterature. Here we present exploratory two-dimensional calculations of the flow of a viscous, single-phase fluid through a wellhead chokeof real dimensions, using the method of Smoothed Particle Hydrodynamics (SPH) coupled with a simple isothermal equation of state fordescription of the flow. The results indicate that an approximately stationary mean flow pattern is rapidly established across the entire tube,with the density and pressure dropping and the flow velocity rising within the choke throat. If the downstream flow is inhibited at the outletend of the tube, a pressure drop of about 12% occurs across the choke when the mean flow reaches an approximate steady state. If, on theother hand, the flow is not inhibited downstream, the pressure drop is reduced to about 8% or less. The flow across the choke throat remainssubsonic with typical velocities of » 0:1c, where c denotes the sound speed. In contrast, the flow velocities in the upstream and downstreamsections of the pipe are on the average factors of » 6 and » 3:5 times lower, respectively. Correlation studies based on experimental dataindicate that the pressure drop is only 3% or even less for gas flow through wellhead chokes at a speed of 0:1c. This discrepancy reflects theinadequacy of the isothermal equation of state to describe realistic gas flows. 2005 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57064203 https://www.redalyc.org/journal/570/57064203/ https://www.redalyc.org/journal/570/57064203/html/ https://www.redalyc.org/journal/570/57064203/57064203.epub https://www.redalyc.org/journal/570/57064203/movil en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.6 Vol.51 |
| format | Artículo científico |
| id | redalyc_57064203 |
| institution | Redalyc |
| language | en |
| publishDate | 2005 |
| publisher | Sociedad Mexicana de Física A.C. |
| spellingShingle | Two-dimensional treesph simulations of choked flow systems J. Klapp Física, Astronomía y Matemáticas SPH choked flow compressible flow numerical particle metnods Two-dimensional treesph simulations of choked flow systems J. Klapp L. Di G. Sigalotti S. Galindo E. Sira Física, Astronomía y Matemáticas SPH choked flow compressible flow numerical particle metnods It is well-known that the flow of gas, liquid, and their mixtures through restrictors installed in pipeline systems is of great practical importancein many industrial processes. In spite of its significance, numerical hydrodynamics simulations of such flows are almost non-existent in theliterature. Here we present exploratory two-dimensional calculations of the flow of a viscous, single-phase fluid through a wellhead chokeof real dimensions, using the method of Smoothed Particle Hydrodynamics (SPH) coupled with a simple isothermal equation of state fordescription of the flow. The results indicate that an approximately stationary mean flow pattern is rapidly established across the entire tube,with the density and pressure dropping and the flow velocity rising within the choke throat. If the downstream flow is inhibited at the outletend of the tube, a pressure drop of about 12% occurs across the choke when the mean flow reaches an approximate steady state. If, on theother hand, the flow is not inhibited downstream, the pressure drop is reduced to about 8% or less. The flow across the choke throat remainssubsonic with typical velocities of » 0:1c, where c denotes the sound speed. In contrast, the flow velocities in the upstream and downstreamsections of the pipe are on the average factors of » 6 and » 3:5 times lower, respectively. Correlation studies based on experimental dataindicate that the pressure drop is only 3% or even less for gas flow through wellhead chokes at a speed of 0:1c. This discrepancy reflects theinadequacy of the isothermal equation of state to describe realistic gas flows. 2005 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57064203 https://www.redalyc.org/journal/570/57064203/ https://www.redalyc.org/journal/570/57064203/html/ https://www.redalyc.org/journal/570/57064203/57064203.epub https://www.redalyc.org/journal/570/57064203/movil en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.6 Vol.51 |
| title | Two-dimensional treesph simulations of choked flow systems |
| topic | Física, Astronomía y Matemáticas SPH choked flow compressible flow numerical particle metnods |
| url | https://www.redalyc.org/articulo.oa?id=57064203 https://www.redalyc.org/journal/570/57064203/ https://www.redalyc.org/journal/570/57064203/html/ https://www.redalyc.org/journal/570/57064203/57064203.epub https://www.redalyc.org/journal/570/57064203/movil |