GDB: A global 3D two-fluid model of plasma turbulence and transport in the tokamak edge

Ben Zhu; Manaure Francisquez; Barrett N. Rogers

doi:10.1016/j.cpc.2018.06.002

GDB: A global 3D two-fluid model of plasma turbulence and transport in the tokamak edge

Ben Zhu, Manaure Francisquez, Barrett N. Rogers

Research output: Contribution to journal › Article › peer-review

50 Scopus citations

Abstract

The global drift-ballooning (GDB) code is developed to study tokamak edge low frequency turbulence and transport, and their relationship to global profile evolution. The code employs a 3D electromagnetic fluid model that does not discriminate between equilibrium and perturbative contributions, capturing arbitrary amplitude fluctuations. Primitive plasma variables, including the E×B flow profiles, are evolved self-consistently in both closed-flux surfaces and the scrape-off-layer (SOL). A suite of numerical techniques described here handle the linear and non-linear components of the model efficiently so as to support realistic discharge parameters (such as realistic deuterium mass ratio m_i∕m_e≈60) and yield good scaling on high performance computing (HPC) systems. GDB resolves turbulence slower than the ion gyrofrequency in simulations that capture the millisecond-scale evolution of global plasma profiles.

Original language	English (US)
Pages (from-to)	46-58
Number of pages	13
Journal	Computer Physics Communications
Volume	232
DOIs	https://doi.org/10.1016/j.cpc.2018.06.002
State	Published - Nov 2018
Externally published	Yes

All Science Journal Classification (ASJC) codes

Hardware and Architecture
General Physics and Astronomy

Keywords

Braginskii equations
Multigrid method
Tokamak edge
Transport
Turbulence

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10.1016/j.cpc.2018.06.002

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title = "GDB: A global 3D two-fluid model of plasma turbulence and transport in the tokamak edge",

abstract = "The global drift-ballooning (GDB) code is developed to study tokamak edge low frequency turbulence and transport, and their relationship to global profile evolution. The code employs a 3D electromagnetic fluid model that does not discriminate between equilibrium and perturbative contributions, capturing arbitrary amplitude fluctuations. Primitive plasma variables, including the E×B flow profiles, are evolved self-consistently in both closed-flux surfaces and the scrape-off-layer (SOL). A suite of numerical techniques described here handle the linear and non-linear components of the model efficiently so as to support realistic discharge parameters (such as realistic deuterium mass ratio mi∕me≈60) and yield good scaling on high performance computing (HPC) systems. GDB resolves turbulence slower than the ion gyrofrequency in simulations that capture the millisecond-scale evolution of global plasma profiles.",

keywords = "Braginskii equations, Multigrid method, Tokamak edge, Transport, Turbulence",

author = "Ben Zhu and Manaure Francisquez and Rogers, \{Barrett N.\}",

note = "Publisher Copyright: {\textcopyright} 2018",

year = "2018",

month = nov,

doi = "10.1016/j.cpc.2018.06.002",

language = "English (US)",

volume = "232",

pages = "46--58",

journal = "Computer Physics Communications",

issn = "0010-4655",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - GDB

T2 - A global 3D two-fluid model of plasma turbulence and transport in the tokamak edge

AU - Zhu, Ben

AU - Francisquez, Manaure

AU - Rogers, Barrett N.

PY - 2018/11

Y1 - 2018/11

N2 - The global drift-ballooning (GDB) code is developed to study tokamak edge low frequency turbulence and transport, and their relationship to global profile evolution. The code employs a 3D electromagnetic fluid model that does not discriminate between equilibrium and perturbative contributions, capturing arbitrary amplitude fluctuations. Primitive plasma variables, including the E×B flow profiles, are evolved self-consistently in both closed-flux surfaces and the scrape-off-layer (SOL). A suite of numerical techniques described here handle the linear and non-linear components of the model efficiently so as to support realistic discharge parameters (such as realistic deuterium mass ratio mi∕me≈60) and yield good scaling on high performance computing (HPC) systems. GDB resolves turbulence slower than the ion gyrofrequency in simulations that capture the millisecond-scale evolution of global plasma profiles.

AB - The global drift-ballooning (GDB) code is developed to study tokamak edge low frequency turbulence and transport, and their relationship to global profile evolution. The code employs a 3D electromagnetic fluid model that does not discriminate between equilibrium and perturbative contributions, capturing arbitrary amplitude fluctuations. Primitive plasma variables, including the E×B flow profiles, are evolved self-consistently in both closed-flux surfaces and the scrape-off-layer (SOL). A suite of numerical techniques described here handle the linear and non-linear components of the model efficiently so as to support realistic discharge parameters (such as realistic deuterium mass ratio mi∕me≈60) and yield good scaling on high performance computing (HPC) systems. GDB resolves turbulence slower than the ion gyrofrequency in simulations that capture the millisecond-scale evolution of global plasma profiles.

KW - Braginskii equations

KW - Multigrid method

KW - Tokamak edge

KW - Transport

KW - Turbulence

UR - https://www.scopus.com/pages/publications/85048719124

UR - https://www.scopus.com/inward/citedby.url?scp=85048719124&partnerID=8YFLogxK

U2 - 10.1016/j.cpc.2018.06.002

DO - 10.1016/j.cpc.2018.06.002

M3 - Article

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SN - 0010-4655

VL - 232

SP - 46

EP - 58

JO - Computer Physics Communications

JF - Computer Physics Communications

ER -

GDB: A global 3D two-fluid model of plasma turbulence and transport in the tokamak edge

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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