Three-dimensional compressible convection at low prandtl numbers
Numerical simulations are used to study fully compressible thermal convection at large Rayleigh numbers. We present here results from a sequence of three-dimensional simulations that reveal a transition from gradually-evolving laminar convection to nearly turbulent convection as the Prandtl number i...
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| Autor*in: |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1990 |
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| Reproduktion: |
Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 |
|---|---|
| Übergeordnetes Werk: |
in: Computer Physics Communications - Amsterdam : Elsevier, 59(1990), 1, Seite 105-117 |
| Übergeordnetes Werk: |
volume:59 ; year:1990 ; number:1 ; pages:105-117 |
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| 520 | |a Numerical simulations are used to study fully compressible thermal convection at large Rayleigh numbers. We present here results from a sequence of three-dimensional simulations that reveal a transition from gradually-evolving laminar convection to nearly turbulent convection as the Prandtl number is reduced from a value of unity to one-tenth. The convective flows form irregular cellular patterns near the upper surface, possessing a network of fast downflow at cell peripheries and gentler upflow at cell centers. At greater depths the curving sheets of downflow collapse into plumes which may twist and possess substantial vertical vorticity. For the lowest Prandtl number, the convection near the bottom of the layer appears to be turbulent, yet the rapidly varying small-scale flow structure there is accompanied by more ordered sites of wavering upflow, with the latter able to penetrate all the way to the upper boundary. Thus a significant component of the flow is able to extend over multiple density scale heights, in contrast to what is argued in formulating mixing-length models for stellar convection. Results are also shown from two-dimensional simulations carried out with very high spatial resolution, which reveal that supersonic convection with fluttering shock systems can be realized. | ||
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(DE-627)NLEJ177808616 (DE-599)GBVNLZ177808616 DE-627 ger DE-627 rakwb eng Three-dimensional compressible convection at low prandtl numbers 1990 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Numerical simulations are used to study fully compressible thermal convection at large Rayleigh numbers. We present here results from a sequence of three-dimensional simulations that reveal a transition from gradually-evolving laminar convection to nearly turbulent convection as the Prandtl number is reduced from a value of unity to one-tenth. The convective flows form irregular cellular patterns near the upper surface, possessing a network of fast downflow at cell peripheries and gentler upflow at cell centers. At greater depths the curving sheets of downflow collapse into plumes which may twist and possess substantial vertical vorticity. For the lowest Prandtl number, the convection near the bottom of the layer appears to be turbulent, yet the rapidly varying small-scale flow structure there is accompanied by more ordered sites of wavering upflow, with the latter able to penetrate all the way to the upper boundary. Thus a significant component of the flow is able to extend over multiple density scale heights, in contrast to what is argued in formulating mixing-length models for stellar convection. Results are also shown from two-dimensional simulations carried out with very high spatial resolution, which reveal that supersonic convection with fluttering shock systems can be realized. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Toomre, J. oth Brummell, N. oth Cattaneo, F. oth Hurlburt, N.E. oth in Computer Physics Communications Amsterdam : Elsevier 59(1990), 1, Seite 105-117 (DE-627)NLEJ177381655 (DE-600)1466511-6 0010-4655 nnns volume:59 year:1990 number:1 pages:105-117 http://linkinghub.elsevier.com/retrieve/pii/0010-4655(90)90160-3 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 59 1990 1 105-117 |
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(DE-627)NLEJ177808616 (DE-599)GBVNLZ177808616 DE-627 ger DE-627 rakwb eng Three-dimensional compressible convection at low prandtl numbers 1990 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Numerical simulations are used to study fully compressible thermal convection at large Rayleigh numbers. We present here results from a sequence of three-dimensional simulations that reveal a transition from gradually-evolving laminar convection to nearly turbulent convection as the Prandtl number is reduced from a value of unity to one-tenth. The convective flows form irregular cellular patterns near the upper surface, possessing a network of fast downflow at cell peripheries and gentler upflow at cell centers. At greater depths the curving sheets of downflow collapse into plumes which may twist and possess substantial vertical vorticity. For the lowest Prandtl number, the convection near the bottom of the layer appears to be turbulent, yet the rapidly varying small-scale flow structure there is accompanied by more ordered sites of wavering upflow, with the latter able to penetrate all the way to the upper boundary. Thus a significant component of the flow is able to extend over multiple density scale heights, in contrast to what is argued in formulating mixing-length models for stellar convection. Results are also shown from two-dimensional simulations carried out with very high spatial resolution, which reveal that supersonic convection with fluttering shock systems can be realized. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Toomre, J. oth Brummell, N. oth Cattaneo, F. oth Hurlburt, N.E. oth in Computer Physics Communications Amsterdam : Elsevier 59(1990), 1, Seite 105-117 (DE-627)NLEJ177381655 (DE-600)1466511-6 0010-4655 nnns volume:59 year:1990 number:1 pages:105-117 http://linkinghub.elsevier.com/retrieve/pii/0010-4655(90)90160-3 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 59 1990 1 105-117 |
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(DE-627)NLEJ177808616 (DE-599)GBVNLZ177808616 DE-627 ger DE-627 rakwb eng Three-dimensional compressible convection at low prandtl numbers 1990 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Numerical simulations are used to study fully compressible thermal convection at large Rayleigh numbers. We present here results from a sequence of three-dimensional simulations that reveal a transition from gradually-evolving laminar convection to nearly turbulent convection as the Prandtl number is reduced from a value of unity to one-tenth. The convective flows form irregular cellular patterns near the upper surface, possessing a network of fast downflow at cell peripheries and gentler upflow at cell centers. At greater depths the curving sheets of downflow collapse into plumes which may twist and possess substantial vertical vorticity. For the lowest Prandtl number, the convection near the bottom of the layer appears to be turbulent, yet the rapidly varying small-scale flow structure there is accompanied by more ordered sites of wavering upflow, with the latter able to penetrate all the way to the upper boundary. Thus a significant component of the flow is able to extend over multiple density scale heights, in contrast to what is argued in formulating mixing-length models for stellar convection. Results are also shown from two-dimensional simulations carried out with very high spatial resolution, which reveal that supersonic convection with fluttering shock systems can be realized. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Toomre, J. oth Brummell, N. oth Cattaneo, F. oth Hurlburt, N.E. oth in Computer Physics Communications Amsterdam : Elsevier 59(1990), 1, Seite 105-117 (DE-627)NLEJ177381655 (DE-600)1466511-6 0010-4655 nnns volume:59 year:1990 number:1 pages:105-117 http://linkinghub.elsevier.com/retrieve/pii/0010-4655(90)90160-3 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 59 1990 1 105-117 |
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(DE-627)NLEJ177808616 (DE-599)GBVNLZ177808616 DE-627 ger DE-627 rakwb eng Three-dimensional compressible convection at low prandtl numbers 1990 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Numerical simulations are used to study fully compressible thermal convection at large Rayleigh numbers. We present here results from a sequence of three-dimensional simulations that reveal a transition from gradually-evolving laminar convection to nearly turbulent convection as the Prandtl number is reduced from a value of unity to one-tenth. The convective flows form irregular cellular patterns near the upper surface, possessing a network of fast downflow at cell peripheries and gentler upflow at cell centers. At greater depths the curving sheets of downflow collapse into plumes which may twist and possess substantial vertical vorticity. For the lowest Prandtl number, the convection near the bottom of the layer appears to be turbulent, yet the rapidly varying small-scale flow structure there is accompanied by more ordered sites of wavering upflow, with the latter able to penetrate all the way to the upper boundary. Thus a significant component of the flow is able to extend over multiple density scale heights, in contrast to what is argued in formulating mixing-length models for stellar convection. Results are also shown from two-dimensional simulations carried out with very high spatial resolution, which reveal that supersonic convection with fluttering shock systems can be realized. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Toomre, J. oth Brummell, N. oth Cattaneo, F. oth Hurlburt, N.E. oth in Computer Physics Communications Amsterdam : Elsevier 59(1990), 1, Seite 105-117 (DE-627)NLEJ177381655 (DE-600)1466511-6 0010-4655 nnns volume:59 year:1990 number:1 pages:105-117 http://linkinghub.elsevier.com/retrieve/pii/0010-4655(90)90160-3 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 59 1990 1 105-117 |
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(DE-627)NLEJ177808616 (DE-599)GBVNLZ177808616 DE-627 ger DE-627 rakwb eng Three-dimensional compressible convection at low prandtl numbers 1990 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Numerical simulations are used to study fully compressible thermal convection at large Rayleigh numbers. We present here results from a sequence of three-dimensional simulations that reveal a transition from gradually-evolving laminar convection to nearly turbulent convection as the Prandtl number is reduced from a value of unity to one-tenth. The convective flows form irregular cellular patterns near the upper surface, possessing a network of fast downflow at cell peripheries and gentler upflow at cell centers. At greater depths the curving sheets of downflow collapse into plumes which may twist and possess substantial vertical vorticity. For the lowest Prandtl number, the convection near the bottom of the layer appears to be turbulent, yet the rapidly varying small-scale flow structure there is accompanied by more ordered sites of wavering upflow, with the latter able to penetrate all the way to the upper boundary. Thus a significant component of the flow is able to extend over multiple density scale heights, in contrast to what is argued in formulating mixing-length models for stellar convection. Results are also shown from two-dimensional simulations carried out with very high spatial resolution, which reveal that supersonic convection with fluttering shock systems can be realized. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Toomre, J. oth Brummell, N. oth Cattaneo, F. oth Hurlburt, N.E. oth in Computer Physics Communications Amsterdam : Elsevier 59(1990), 1, Seite 105-117 (DE-627)NLEJ177381655 (DE-600)1466511-6 0010-4655 nnns volume:59 year:1990 number:1 pages:105-117 http://linkinghub.elsevier.com/retrieve/pii/0010-4655(90)90160-3 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 59 1990 1 105-117 |
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Numerical simulations are used to study fully compressible thermal convection at large Rayleigh numbers. We present here results from a sequence of three-dimensional simulations that reveal a transition from gradually-evolving laminar convection to nearly turbulent convection as the Prandtl number is reduced from a value of unity to one-tenth. The convective flows form irregular cellular patterns near the upper surface, possessing a network of fast downflow at cell peripheries and gentler upflow at cell centers. At greater depths the curving sheets of downflow collapse into plumes which may twist and possess substantial vertical vorticity. For the lowest Prandtl number, the convection near the bottom of the layer appears to be turbulent, yet the rapidly varying small-scale flow structure there is accompanied by more ordered sites of wavering upflow, with the latter able to penetrate all the way to the upper boundary. Thus a significant component of the flow is able to extend over multiple density scale heights, in contrast to what is argued in formulating mixing-length models for stellar convection. Results are also shown from two-dimensional simulations carried out with very high spatial resolution, which reveal that supersonic convection with fluttering shock systems can be realized. |
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Numerical simulations are used to study fully compressible thermal convection at large Rayleigh numbers. We present here results from a sequence of three-dimensional simulations that reveal a transition from gradually-evolving laminar convection to nearly turbulent convection as the Prandtl number is reduced from a value of unity to one-tenth. The convective flows form irregular cellular patterns near the upper surface, possessing a network of fast downflow at cell peripheries and gentler upflow at cell centers. At greater depths the curving sheets of downflow collapse into plumes which may twist and possess substantial vertical vorticity. For the lowest Prandtl number, the convection near the bottom of the layer appears to be turbulent, yet the rapidly varying small-scale flow structure there is accompanied by more ordered sites of wavering upflow, with the latter able to penetrate all the way to the upper boundary. Thus a significant component of the flow is able to extend over multiple density scale heights, in contrast to what is argued in formulating mixing-length models for stellar convection. Results are also shown from two-dimensional simulations carried out with very high spatial resolution, which reveal that supersonic convection with fluttering shock systems can be realized. |
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Numerical simulations are used to study fully compressible thermal convection at large Rayleigh numbers. We present here results from a sequence of three-dimensional simulations that reveal a transition from gradually-evolving laminar convection to nearly turbulent convection as the Prandtl number is reduced from a value of unity to one-tenth. The convective flows form irregular cellular patterns near the upper surface, possessing a network of fast downflow at cell peripheries and gentler upflow at cell centers. At greater depths the curving sheets of downflow collapse into plumes which may twist and possess substantial vertical vorticity. For the lowest Prandtl number, the convection near the bottom of the layer appears to be turbulent, yet the rapidly varying small-scale flow structure there is accompanied by more ordered sites of wavering upflow, with the latter able to penetrate all the way to the upper boundary. Thus a significant component of the flow is able to extend over multiple density scale heights, in contrast to what is argued in formulating mixing-length models for stellar convection. Results are also shown from two-dimensional simulations carried out with very high spatial resolution, which reveal that supersonic convection with fluttering shock systems can be realized. |
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We present here results from a sequence of three-dimensional simulations that reveal a transition from gradually-evolving laminar convection to nearly turbulent convection as the Prandtl number is reduced from a value of unity to one-tenth. The convective flows form irregular cellular patterns near the upper surface, possessing a network of fast downflow at cell peripheries and gentler upflow at cell centers. At greater depths the curving sheets of downflow collapse into plumes which may twist and possess substantial vertical vorticity. For the lowest Prandtl number, the convection near the bottom of the layer appears to be turbulent, yet the rapidly varying small-scale flow structure there is accompanied by more ordered sites of wavering upflow, with the latter able to penetrate all the way to the upper boundary. Thus a significant component of the flow is able to extend over multiple density scale heights, in contrast to what is argued in formulating mixing-length models for stellar convection. Results are also shown from two-dimensional simulations carried out with very high spatial resolution, which reveal that supersonic convection with fluttering shock systems can be realized.</subfield></datafield><datafield tag="533" ind1=" " ind2=" "><subfield code="f">Elsevier Journal Backfiles on ScienceDirect 1907 - 2002</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Toomre, J.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Brummell, N.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Cattaneo, F.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Hurlburt, N.E.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">in</subfield><subfield code="t">Computer Physics Communications</subfield><subfield code="d">Amsterdam : Elsevier</subfield><subfield code="g">59(1990), 1, Seite 105-117</subfield><subfield code="w">(DE-627)NLEJ177381655</subfield><subfield code="w">(DE-600)1466511-6</subfield><subfield code="x">0010-4655</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:59</subfield><subfield code="g">year:1990</subfield><subfield code="g">number:1</subfield><subfield code="g">pages:105-117</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">http://linkinghub.elsevier.com/retrieve/pii/0010-4655(90)90160-3</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_H</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-1-SDJ</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_NL_ARTICLE</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">59</subfield><subfield code="j">1990</subfield><subfield code="e">1</subfield><subfield code="h">105-117</subfield></datafield></record></collection>
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