# Impact of higher-order flows in the moment equations on Pfirsch-Schlüter friction coefficients

## Abstract

The impact of the higher-order flows in the moment approach on an estimate of the friction coefficients is numerically examined. The higher-order flows are described by the lower-order hydrodynamic flows using the collisional plasma assumption. Their effects have not been consistently taken into account thus far in the widely used neoclassical transport codes based on the moment equations in terms of the Pfirsch-Schlüter flux. Due to numerically solving the friction-flow matrix without using the small-mass ratio expansion, it is clearly revealed that incorporating the higher-order flow effects is of importance especially for plasmas including multiple hydrogenic ions and other lighter species with similar masses.

- Authors:

- Japan Atomic Energy Agency, Naka, Ibaraki 311-0193 (Japan)

- Publication Date:

- OSTI Identifier:
- 22303639

- Resource Type:
- Journal Article

- Journal Name:
- Physics of Plasmas

- Additional Journal Information:
- Journal Volume: 21; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COLLISIONAL PLASMA; EQUATIONS; EXPANSION; FRICTION; FRICTION FACTOR; MASS; MATRICES; NEOCLASSICAL TRANSPORT THEORY

### Citation Formats

```
Honda, M., E-mail: honda.mitsuru@jaea.go.jp.
```*Impact of higher-order flows in the moment equations on Pfirsch-Schlüter friction coefficients*. United States: N. p., 2014.
Web. doi:10.1063/1.4895795.

```
Honda, M., E-mail: honda.mitsuru@jaea.go.jp.
```*Impact of higher-order flows in the moment equations on Pfirsch-Schlüter friction coefficients*. United States. doi:10.1063/1.4895795.

```
Honda, M., E-mail: honda.mitsuru@jaea.go.jp. Mon .
"Impact of higher-order flows in the moment equations on Pfirsch-Schlüter friction coefficients". United States. doi:10.1063/1.4895795.
```

```
@article{osti_22303639,
```

title = {Impact of higher-order flows in the moment equations on Pfirsch-Schlüter friction coefficients},

author = {Honda, M., E-mail: honda.mitsuru@jaea.go.jp},

abstractNote = {The impact of the higher-order flows in the moment approach on an estimate of the friction coefficients is numerically examined. The higher-order flows are described by the lower-order hydrodynamic flows using the collisional plasma assumption. Their effects have not been consistently taken into account thus far in the widely used neoclassical transport codes based on the moment equations in terms of the Pfirsch-Schlüter flux. Due to numerically solving the friction-flow matrix without using the small-mass ratio expansion, it is clearly revealed that incorporating the higher-order flow effects is of importance especially for plasmas including multiple hydrogenic ions and other lighter species with similar masses.},

doi = {10.1063/1.4895795},

journal = {Physics of Plasmas},

issn = {1070-664X},

number = 9,

volume = 21,

place = {United States},

year = {2014},

month = {9}

}

DOI: 10.1063/1.4895795

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