DSMC simulation of near-field enceladus plumes from tiger stripe fractures

Zheng Li, Rohit Dhariwal, Deborah Levin Fliflet

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The Saturn orbiter, Cassini, during its flyby of Saturn's moon, Enceladus, in 2005 discovered plumes of water vapor and ice grains in the south-polar region, primarily originating from four prominent fractures known as tiger stripes. Significant differences between gas and grain velocities suggest that the plume source lies beneath the satellite's surface. In this paper we model the subsurface gas and ice grain mixture flow from a subterranean source through a 45 m long subsurface channel. The gas flow inside the channel is continuum and inviscid in nature and is solved using an equilibrium direct simulation Monte Carlo (eDSMC) approach. Assuming that the ice grains are present in small mass concentration in the plume, an overlay technique to model the ice grain number density and size distribution along the channel is employed. A second more rigorous method, denoted as eDSMC-condensation, is developed to model ice grain collisions with water molecules and ice grain size growth directly in the water molecular flow as the two-phase flow evolves. The difference of gas and ice grains properties obtained with the two methods for a conical nozzle shape are found to be large. The ice grain size and mass fraction are compared at the surface exit with different method and nozzle shapes. Finally, it is observed that the eDSMC condensation simulations of the double-throated nozzle show that the flow properties strongly depend on the drag coefficient.

Original languageEnglish (US)
Title of host publication44th AIAA Thermophysics Conference
StatePublished - 2013
Externally publishedYes
Event44th AIAA Thermophysics Conference - San Diego, CA, United States
Duration: Jun 24 2013Jun 27 2013

Other

Other44th AIAA Thermophysics Conference
CountryUnited States
CitySan Diego, CA
Period6/24/136/27/13

Fingerprint

Enceladus
plumes
Ice
near fields
ice
simulation
Nozzles
Saturn
nozzles
Condensation
condensation
grain size
conical nozzles
Gases
gases
satellite surfaces
molecular flow
drag coefficients
Drag coefficient
Moon

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

Li, Z., Dhariwal, R., & Levin Fliflet, D. (2013). DSMC simulation of near-field enceladus plumes from tiger stripe fractures. In 44th AIAA Thermophysics Conference

DSMC simulation of near-field enceladus plumes from tiger stripe fractures. / Li, Zheng; Dhariwal, Rohit; Levin Fliflet, Deborah.

44th AIAA Thermophysics Conference. 2013.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Li, Z, Dhariwal, R & Levin Fliflet, D 2013, DSMC simulation of near-field enceladus plumes from tiger stripe fractures. in 44th AIAA Thermophysics Conference. 44th AIAA Thermophysics Conference, San Diego, CA, United States, 6/24/13.
Li Z, Dhariwal R, Levin Fliflet D. DSMC simulation of near-field enceladus plumes from tiger stripe fractures. In 44th AIAA Thermophysics Conference. 2013
Li, Zheng ; Dhariwal, Rohit ; Levin Fliflet, Deborah. / DSMC simulation of near-field enceladus plumes from tiger stripe fractures. 44th AIAA Thermophysics Conference. 2013.
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