### Abstract

Language | English |
---|---|

Pages | 603-615 |

Number of pages | 13 |

Journal | Acta Astronautica |

Volume | 48 |

Issue number | 5-12 |

DOIs | |

Publication status | Published - 30 Jun 2001 |

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### Keywords

- Microgravity Environment (MGE)
- ISS
- international space station
- Navier-Stokes equations

### Cite this

*Acta Astronautica*,

*48*(5-12), 603-615. https://doi.org/10.1016/S0094-5765(01)00031-5

}

*Acta Astronautica*, vol. 48, no. 5-12, pp. 603-615. https://doi.org/10.1016/S0094-5765(01)00031-5

**On the convective disturbances induced by g-jitter on the space station.** / Monti, R.; Savino, R.; Lappa, M.

Research output: Contribution to journal › Article

TY - JOUR

T1 - On the convective disturbances induced by g-jitter on the space station

AU - Monti, R.

AU - Savino, R.

AU - Lappa, M.

PY - 2001/6/30

Y1 - 2001/6/30

N2 - A numerical tool has been prepared to quickly predict the overall disturbances for the typical Microgravity Environment (MGE) on the ISS. A reference study case (that shows a large sensitivity to acceleration disturbances) is identified and numerical simulations are carried out to compare the results of the solution of the full Navier-Stokes equations with a time-dependent acceleration (that give the instantaneous time-dependent flow) with the solutions of the time-averaged field equations (Gershuni formulation), containing all the g-jitter terms (like those that identify the microgravity environment of the ISS) grouped in a single parameter. The paper shows that the overall disturbances of the thermo-fluid-dynamic field are easily evaluated assigning as input to the fluid-dynamic code a single (equivalent) frequency g-jitter (in the direct formulation) or an overall vibrational Rayleigh number (in the time-averaged formulation). The code is validated and applied to the problem of thermodiffusion in a typical metal alloy.

AB - A numerical tool has been prepared to quickly predict the overall disturbances for the typical Microgravity Environment (MGE) on the ISS. A reference study case (that shows a large sensitivity to acceleration disturbances) is identified and numerical simulations are carried out to compare the results of the solution of the full Navier-Stokes equations with a time-dependent acceleration (that give the instantaneous time-dependent flow) with the solutions of the time-averaged field equations (Gershuni formulation), containing all the g-jitter terms (like those that identify the microgravity environment of the ISS) grouped in a single parameter. The paper shows that the overall disturbances of the thermo-fluid-dynamic field are easily evaluated assigning as input to the fluid-dynamic code a single (equivalent) frequency g-jitter (in the direct formulation) or an overall vibrational Rayleigh number (in the time-averaged formulation). The code is validated and applied to the problem of thermodiffusion in a typical metal alloy.

KW - Microgravity Environment (MGE)

KW - ISS

KW - international space station

KW - Navier-Stokes equations

UR - http://www.sciencedirect.com/science/journal/00945765

U2 - 10.1016/S0094-5765(01)00031-5

DO - 10.1016/S0094-5765(01)00031-5

M3 - Article

VL - 48

SP - 603

EP - 615

JO - Acta Astronautica

T2 - Acta Astronautica

JF - Acta Astronautica

SN - 0094-5765

IS - 5-12

ER -