### Abstract

Original language | English |
---|---|

Pages (from-to) | 8-14 |

Number of pages | 7 |

Journal | Computer Physics Communications |

Volume | 178 |

Issue number | 1 |

DOIs | |

Publication status | Published - 1 Jan 2008 |

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### Keywords

- nonuniform nested grid method
- Ionospheric turbulence
- method for simulations
- rf induced
- ionosphere
- electromagnetic waves
- numerical simulations

### Cite this

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**A nonuniform nested grid method for simulations of RF induced ionospheric turbulence.** / Eliasson, Bengt.

Research output: Contribution to journal › Article

TY - JOUR

T1 - A nonuniform nested grid method for simulations of RF induced ionospheric turbulence

AU - Eliasson, Bengt

PY - 2008/1/1

Y1 - 2008/1/1

N2 - We present a numerical scheme to simulate radio-frequency (RF) induced ionospheric turbulence, in which an electromagnetic wave is injected into the overhead ionospheric plasma. At the turning point of the ordinary mode, the electromagnetic wave undergoes linear mode-conversion to electrostatic Langmuir and upper hybrid waves that can have a much shorter wavelength than the electromagnetic wave. In order to resolve both the electromagnetic and electrostatic waves, avoiding severe restrictions on the time step due to the Courant–Friedrich–Lewy (CFL) condition, the equation of motion for the plasma particles is solved on a denser grid than that for the Maxwell equations near the mode-conversion region. An interpolation scheme is employed to calculate the electromagnetic field in the equation of motion of the plasma particles, and an averaging scheme is used to calculate the current density acting as a source in the Maxwell equation. Special care has to be taken to reduce numerical recurrence effects when the wavelength of the electrostatic wave is of the same order or shorter than the coarse grid spacing of the electromagnetic wave.

AB - We present a numerical scheme to simulate radio-frequency (RF) induced ionospheric turbulence, in which an electromagnetic wave is injected into the overhead ionospheric plasma. At the turning point of the ordinary mode, the electromagnetic wave undergoes linear mode-conversion to electrostatic Langmuir and upper hybrid waves that can have a much shorter wavelength than the electromagnetic wave. In order to resolve both the electromagnetic and electrostatic waves, avoiding severe restrictions on the time step due to the Courant–Friedrich–Lewy (CFL) condition, the equation of motion for the plasma particles is solved on a denser grid than that for the Maxwell equations near the mode-conversion region. An interpolation scheme is employed to calculate the electromagnetic field in the equation of motion of the plasma particles, and an averaging scheme is used to calculate the current density acting as a source in the Maxwell equation. Special care has to be taken to reduce numerical recurrence effects when the wavelength of the electrostatic wave is of the same order or shorter than the coarse grid spacing of the electromagnetic wave.

KW - nonuniform nested grid method

KW - Ionospheric turbulence

KW - method for simulations

KW - rf induced

KW - ionosphere

KW - electromagnetic waves

KW - numerical simulations

UR - http://www.sciencedirect.com/science/article/pii/S0010465507003657

U2 - 10.1016/j.cpc.2007.07.008

DO - 10.1016/j.cpc.2007.07.008

M3 - Article

VL - 178

SP - 8

EP - 14

JO - Computer Physics Communications

JF - Computer Physics Communications

SN - 0010-4655

IS - 1

ER -