Simulations of the wardle instability of c-type shock waves
Abstract C-type shocks in the partially ionized ISM are modelled by numerical simulations. Under certain conditions the shocks are subject to the Wardle instability, which initially makes the shock front rippled, then in the non-linear stage can produce density variations in both the ion and neutral...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Tóth, G. [verfasserIn] |
|---|
| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1995 |
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| Anmerkung: |
© Kluwer Academic Publishers 1995 |
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| Übergeordnetes Werk: |
Enthalten in: Astrophysics and space science - Kluwer Academic Publishers, 1968, 233(1995), 1-2 vom: Nov., Seite 301-305 |
|---|---|
| Übergeordnetes Werk: |
volume:233 ; year:1995 ; number:1-2 ; month:11 ; pages:301-305 |
| Links: |
|---|
| DOI / URN: |
10.1007/BF00627363 |
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OLC2066205354 |
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| 520 | |a Abstract C-type shocks in the partially ionized ISM are modelled by numerical simulations. Under certain conditions the shocks are subject to the Wardle instability, which initially makes the shock front rippled, then in the non-linear stage can produce density variations in both the ion and neutral fluids. A systematic search in the numerically accessible parameter space is done to determine the wave vector $ k_{max} $ and the growth ratesmax of the fastest growing modes. The neutral Alfvén number, and the angleθsbetween the shock normal and the upstream magnetic field determine the strength and obliqueness of the shock, as well as the dimensionless parameters of the fastest growing mode. The results confirm and extend Wardle's linear analysis. The non-linear evolution shows saturation of the instability and the formation of high density regions that detach from the shock front with the downstream flow. Numerical difficulties are partially solved by an implicit treatment of the ion-neutral friction terms, but strong shocks still can not be modelled efficiently. A fully implicit method for the ions and the magnetic field is used to model C-type shocks with low fractional ionization and high ion Alfvén speed. | ||
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10.1007/BF00627363 doi (DE-627)OLC2066205354 (DE-He213)BF00627363-p DE-627 ger DE-627 rakwb eng 520 530 620 VZ 16,12 ssgn Tóth, G. verfasserin aut Simulations of the wardle instability of c-type shock waves 1995 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Kluwer Academic Publishers 1995 Abstract C-type shocks in the partially ionized ISM are modelled by numerical simulations. Under certain conditions the shocks are subject to the Wardle instability, which initially makes the shock front rippled, then in the non-linear stage can produce density variations in both the ion and neutral fluids. A systematic search in the numerically accessible parameter space is done to determine the wave vector $ k_{max} $ and the growth ratesmax of the fastest growing modes. The neutral Alfvén number, and the angleθsbetween the shock normal and the upstream magnetic field determine the strength and obliqueness of the shock, as well as the dimensionless parameters of the fastest growing mode. The results confirm and extend Wardle's linear analysis. The non-linear evolution shows saturation of the instability and the formation of high density regions that detach from the shock front with the downstream flow. Numerical difficulties are partially solved by an implicit treatment of the ion-neutral friction terms, but strong shocks still can not be modelled efficiently. A fully implicit method for the ions and the magnetic field is used to model C-type shocks with low fractional ionization and high ion Alfvén speed. Enthalten in Astrophysics and space science Kluwer Academic Publishers, 1968 233(1995), 1-2 vom: Nov., Seite 301-305 (DE-627)129062723 (DE-600)629-4 (DE-576)014393522 0004-640X nnns volume:233 year:1995 number:1-2 month:11 pages:301-305 https://doi.org/10.1007/BF00627363 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-AST SSG-OPC-AST GBV_ILN_11 GBV_ILN_22 GBV_ILN_31 GBV_ILN_40 GBV_ILN_47 GBV_ILN_70 GBV_ILN_2002 GBV_ILN_2279 GBV_ILN_2286 GBV_ILN_4012 GBV_ILN_4046 AR 233 1995 1-2 11 301-305 |
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10.1007/BF00627363 doi (DE-627)OLC2066205354 (DE-He213)BF00627363-p DE-627 ger DE-627 rakwb eng 520 530 620 VZ 16,12 ssgn Tóth, G. verfasserin aut Simulations of the wardle instability of c-type shock waves 1995 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Kluwer Academic Publishers 1995 Abstract C-type shocks in the partially ionized ISM are modelled by numerical simulations. Under certain conditions the shocks are subject to the Wardle instability, which initially makes the shock front rippled, then in the non-linear stage can produce density variations in both the ion and neutral fluids. A systematic search in the numerically accessible parameter space is done to determine the wave vector $ k_{max} $ and the growth ratesmax of the fastest growing modes. The neutral Alfvén number, and the angleθsbetween the shock normal and the upstream magnetic field determine the strength and obliqueness of the shock, as well as the dimensionless parameters of the fastest growing mode. The results confirm and extend Wardle's linear analysis. The non-linear evolution shows saturation of the instability and the formation of high density regions that detach from the shock front with the downstream flow. Numerical difficulties are partially solved by an implicit treatment of the ion-neutral friction terms, but strong shocks still can not be modelled efficiently. A fully implicit method for the ions and the magnetic field is used to model C-type shocks with low fractional ionization and high ion Alfvén speed. Enthalten in Astrophysics and space science Kluwer Academic Publishers, 1968 233(1995), 1-2 vom: Nov., Seite 301-305 (DE-627)129062723 (DE-600)629-4 (DE-576)014393522 0004-640X nnns volume:233 year:1995 number:1-2 month:11 pages:301-305 https://doi.org/10.1007/BF00627363 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-AST SSG-OPC-AST GBV_ILN_11 GBV_ILN_22 GBV_ILN_31 GBV_ILN_40 GBV_ILN_47 GBV_ILN_70 GBV_ILN_2002 GBV_ILN_2279 GBV_ILN_2286 GBV_ILN_4012 GBV_ILN_4046 AR 233 1995 1-2 11 301-305 |
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10.1007/BF00627363 doi (DE-627)OLC2066205354 (DE-He213)BF00627363-p DE-627 ger DE-627 rakwb eng 520 530 620 VZ 16,12 ssgn Tóth, G. verfasserin aut Simulations of the wardle instability of c-type shock waves 1995 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Kluwer Academic Publishers 1995 Abstract C-type shocks in the partially ionized ISM are modelled by numerical simulations. Under certain conditions the shocks are subject to the Wardle instability, which initially makes the shock front rippled, then in the non-linear stage can produce density variations in both the ion and neutral fluids. A systematic search in the numerically accessible parameter space is done to determine the wave vector $ k_{max} $ and the growth ratesmax of the fastest growing modes. The neutral Alfvén number, and the angleθsbetween the shock normal and the upstream magnetic field determine the strength and obliqueness of the shock, as well as the dimensionless parameters of the fastest growing mode. The results confirm and extend Wardle's linear analysis. The non-linear evolution shows saturation of the instability and the formation of high density regions that detach from the shock front with the downstream flow. Numerical difficulties are partially solved by an implicit treatment of the ion-neutral friction terms, but strong shocks still can not be modelled efficiently. A fully implicit method for the ions and the magnetic field is used to model C-type shocks with low fractional ionization and high ion Alfvén speed. Enthalten in Astrophysics and space science Kluwer Academic Publishers, 1968 233(1995), 1-2 vom: Nov., Seite 301-305 (DE-627)129062723 (DE-600)629-4 (DE-576)014393522 0004-640X nnns volume:233 year:1995 number:1-2 month:11 pages:301-305 https://doi.org/10.1007/BF00627363 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-AST SSG-OPC-AST GBV_ILN_11 GBV_ILN_22 GBV_ILN_31 GBV_ILN_40 GBV_ILN_47 GBV_ILN_70 GBV_ILN_2002 GBV_ILN_2279 GBV_ILN_2286 GBV_ILN_4012 GBV_ILN_4046 AR 233 1995 1-2 11 301-305 |
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10.1007/BF00627363 doi (DE-627)OLC2066205354 (DE-He213)BF00627363-p DE-627 ger DE-627 rakwb eng 520 530 620 VZ 16,12 ssgn Tóth, G. verfasserin aut Simulations of the wardle instability of c-type shock waves 1995 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Kluwer Academic Publishers 1995 Abstract C-type shocks in the partially ionized ISM are modelled by numerical simulations. Under certain conditions the shocks are subject to the Wardle instability, which initially makes the shock front rippled, then in the non-linear stage can produce density variations in both the ion and neutral fluids. A systematic search in the numerically accessible parameter space is done to determine the wave vector $ k_{max} $ and the growth ratesmax of the fastest growing modes. The neutral Alfvén number, and the angleθsbetween the shock normal and the upstream magnetic field determine the strength and obliqueness of the shock, as well as the dimensionless parameters of the fastest growing mode. The results confirm and extend Wardle's linear analysis. The non-linear evolution shows saturation of the instability and the formation of high density regions that detach from the shock front with the downstream flow. Numerical difficulties are partially solved by an implicit treatment of the ion-neutral friction terms, but strong shocks still can not be modelled efficiently. A fully implicit method for the ions and the magnetic field is used to model C-type shocks with low fractional ionization and high ion Alfvén speed. Enthalten in Astrophysics and space science Kluwer Academic Publishers, 1968 233(1995), 1-2 vom: Nov., Seite 301-305 (DE-627)129062723 (DE-600)629-4 (DE-576)014393522 0004-640X nnns volume:233 year:1995 number:1-2 month:11 pages:301-305 https://doi.org/10.1007/BF00627363 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-AST SSG-OPC-AST GBV_ILN_11 GBV_ILN_22 GBV_ILN_31 GBV_ILN_40 GBV_ILN_47 GBV_ILN_70 GBV_ILN_2002 GBV_ILN_2279 GBV_ILN_2286 GBV_ILN_4012 GBV_ILN_4046 AR 233 1995 1-2 11 301-305 |
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10.1007/BF00627363 doi (DE-627)OLC2066205354 (DE-He213)BF00627363-p DE-627 ger DE-627 rakwb eng 520 530 620 VZ 16,12 ssgn Tóth, G. verfasserin aut Simulations of the wardle instability of c-type shock waves 1995 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Kluwer Academic Publishers 1995 Abstract C-type shocks in the partially ionized ISM are modelled by numerical simulations. Under certain conditions the shocks are subject to the Wardle instability, which initially makes the shock front rippled, then in the non-linear stage can produce density variations in both the ion and neutral fluids. A systematic search in the numerically accessible parameter space is done to determine the wave vector $ k_{max} $ and the growth ratesmax of the fastest growing modes. The neutral Alfvén number, and the angleθsbetween the shock normal and the upstream magnetic field determine the strength and obliqueness of the shock, as well as the dimensionless parameters of the fastest growing mode. The results confirm and extend Wardle's linear analysis. The non-linear evolution shows saturation of the instability and the formation of high density regions that detach from the shock front with the downstream flow. Numerical difficulties are partially solved by an implicit treatment of the ion-neutral friction terms, but strong shocks still can not be modelled efficiently. A fully implicit method for the ions and the magnetic field is used to model C-type shocks with low fractional ionization and high ion Alfvén speed. Enthalten in Astrophysics and space science Kluwer Academic Publishers, 1968 233(1995), 1-2 vom: Nov., Seite 301-305 (DE-627)129062723 (DE-600)629-4 (DE-576)014393522 0004-640X nnns volume:233 year:1995 number:1-2 month:11 pages:301-305 https://doi.org/10.1007/BF00627363 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-AST SSG-OPC-AST GBV_ILN_11 GBV_ILN_22 GBV_ILN_31 GBV_ILN_40 GBV_ILN_47 GBV_ILN_70 GBV_ILN_2002 GBV_ILN_2279 GBV_ILN_2286 GBV_ILN_4012 GBV_ILN_4046 AR 233 1995 1-2 11 301-305 |
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Simulations of the wardle instability of c-type shock waves |
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Abstract C-type shocks in the partially ionized ISM are modelled by numerical simulations. Under certain conditions the shocks are subject to the Wardle instability, which initially makes the shock front rippled, then in the non-linear stage can produce density variations in both the ion and neutral fluids. A systematic search in the numerically accessible parameter space is done to determine the wave vector $ k_{max} $ and the growth ratesmax of the fastest growing modes. The neutral Alfvén number, and the angleθsbetween the shock normal and the upstream magnetic field determine the strength and obliqueness of the shock, as well as the dimensionless parameters of the fastest growing mode. The results confirm and extend Wardle's linear analysis. The non-linear evolution shows saturation of the instability and the formation of high density regions that detach from the shock front with the downstream flow. Numerical difficulties are partially solved by an implicit treatment of the ion-neutral friction terms, but strong shocks still can not be modelled efficiently. A fully implicit method for the ions and the magnetic field is used to model C-type shocks with low fractional ionization and high ion Alfvén speed. © Kluwer Academic Publishers 1995 |
| abstractGer |
Abstract C-type shocks in the partially ionized ISM are modelled by numerical simulations. Under certain conditions the shocks are subject to the Wardle instability, which initially makes the shock front rippled, then in the non-linear stage can produce density variations in both the ion and neutral fluids. A systematic search in the numerically accessible parameter space is done to determine the wave vector $ k_{max} $ and the growth ratesmax of the fastest growing modes. The neutral Alfvén number, and the angleθsbetween the shock normal and the upstream magnetic field determine the strength and obliqueness of the shock, as well as the dimensionless parameters of the fastest growing mode. The results confirm and extend Wardle's linear analysis. The non-linear evolution shows saturation of the instability and the formation of high density regions that detach from the shock front with the downstream flow. Numerical difficulties are partially solved by an implicit treatment of the ion-neutral friction terms, but strong shocks still can not be modelled efficiently. A fully implicit method for the ions and the magnetic field is used to model C-type shocks with low fractional ionization and high ion Alfvén speed. © Kluwer Academic Publishers 1995 |
| abstract_unstemmed |
Abstract C-type shocks in the partially ionized ISM are modelled by numerical simulations. Under certain conditions the shocks are subject to the Wardle instability, which initially makes the shock front rippled, then in the non-linear stage can produce density variations in both the ion and neutral fluids. A systematic search in the numerically accessible parameter space is done to determine the wave vector $ k_{max} $ and the growth ratesmax of the fastest growing modes. The neutral Alfvén number, and the angleθsbetween the shock normal and the upstream magnetic field determine the strength and obliqueness of the shock, as well as the dimensionless parameters of the fastest growing mode. The results confirm and extend Wardle's linear analysis. The non-linear evolution shows saturation of the instability and the formation of high density regions that detach from the shock front with the downstream flow. Numerical difficulties are partially solved by an implicit treatment of the ion-neutral friction terms, but strong shocks still can not be modelled efficiently. A fully implicit method for the ions and the magnetic field is used to model C-type shocks with low fractional ionization and high ion Alfvén speed. © Kluwer Academic Publishers 1995 |
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| title_short |
Simulations of the wardle instability of c-type shock waves |
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https://doi.org/10.1007/BF00627363 |
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