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

R. Monti, R. Savino, M. Lappa

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

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.
LanguageEnglish
Pages603-615
Number of pages13
JournalActa Astronautica
Volume48
Issue number5-12
DOIs
Publication statusPublished - 30 Jun 2001

Fingerprint

Microgravity
Space stations
Fluid dynamics
Jitter
Navier Stokes equations
Computer simulation
Metals

Keywords

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

Cite this

Monti, R. ; Savino, R. ; Lappa, M. / On the convective disturbances induced by g-jitter on the space station. In: Acta Astronautica. 2001 ; Vol. 48, No. 5-12. pp. 603-615.
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On the convective disturbances induced by g-jitter on the space station. / Monti, R.; Savino, R.; Lappa, M.

In: Acta Astronautica, Vol. 48, No. 5-12, 30.06.2001, p. 603-615.

Research output: Contribution to journalArticle

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