Dissipation in compressible magnetohydrodynamic turbulence

James McLellan Stone; Eve Charis Ostriker; Charles F. Gammie

doi:10.1086/311718

Dissipation in compressible magnetohydrodynamic turbulence

James McLellan Stone, Eve Charis Ostriker, Charles F. Gammie

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447 Scopus citations

Abstract

We report results of a three-dimensional, high resolution (up to 512³) numerical investigation of supersonic compressible magnetohydrodynamic turbulence. We consider both forced and decaying turbulence. The model parameters are appropriate to conditions found in Galactic molecular clouds. We find that the dissipation time of turbulence is of the order of the flow crossing time or smaller, even in the presence of strong magnetic fields. About half of the dissipation occurs in shocks. Weak magnetic fields are amplified and tangled by the turbulence, while strong fields remain well ordered.

Original language	English (US)
Pages (from-to)	L99-L102
Journal	Astrophysical Journal
Volume	508
Issue number	1 PART II
DOIs	https://doi.org/10.1086/311718
State	Published - 1998

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

ISM: kinematics and dynamics
ISM: magnetic fields
MHD
Turbulence
Waves

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10.1086/311718

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title = "Dissipation in compressible magnetohydrodynamic turbulence",

abstract = "We report results of a three-dimensional, high resolution (up to 5123) numerical investigation of supersonic compressible magnetohydrodynamic turbulence. We consider both forced and decaying turbulence. The model parameters are appropriate to conditions found in Galactic molecular clouds. We find that the dissipation time of turbulence is of the order of the flow crossing time or smaller, even in the presence of strong magnetic fields. About half of the dissipation occurs in shocks. Weak magnetic fields are amplified and tangled by the turbulence, while strong fields remain well ordered.",

keywords = "ISM: kinematics and dynamics, ISM: magnetic fields, MHD, Turbulence, Waves",

author = "Stone, {James McLellan} and Ostriker, {Eve Charis} and Gammie, {Charles F.}",

note = "Funding Information: This work is supported in part by NASA grant NAG 53840. Computations were performed at the National Center for Supercomputing Applications.",

year = "1998",

doi = "10.1086/311718",

language = "English (US)",

volume = "508",

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T1 - Dissipation in compressible magnetohydrodynamic turbulence

AU - Stone, James McLellan

AU - Ostriker, Eve Charis

AU - Gammie, Charles F.

N1 - Funding Information: This work is supported in part by NASA grant NAG 53840. Computations were performed at the National Center for Supercomputing Applications.

PY - 1998

Y1 - 1998

N2 - We report results of a three-dimensional, high resolution (up to 5123) numerical investigation of supersonic compressible magnetohydrodynamic turbulence. We consider both forced and decaying turbulence. The model parameters are appropriate to conditions found in Galactic molecular clouds. We find that the dissipation time of turbulence is of the order of the flow crossing time or smaller, even in the presence of strong magnetic fields. About half of the dissipation occurs in shocks. Weak magnetic fields are amplified and tangled by the turbulence, while strong fields remain well ordered.

AB - We report results of a three-dimensional, high resolution (up to 5123) numerical investigation of supersonic compressible magnetohydrodynamic turbulence. We consider both forced and decaying turbulence. The model parameters are appropriate to conditions found in Galactic molecular clouds. We find that the dissipation time of turbulence is of the order of the flow crossing time or smaller, even in the presence of strong magnetic fields. About half of the dissipation occurs in shocks. Weak magnetic fields are amplified and tangled by the turbulence, while strong fields remain well ordered.

KW - ISM: kinematics and dynamics

KW - ISM: magnetic fields

KW - MHD

KW - Turbulence

KW - Waves

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DO - 10.1086/311718

M3 - Article

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VL - 508

SP - L99-L102

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 PART II

ER -

Dissipation in compressible magnetohydrodynamic turbulence

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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