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Simulation of Mixing Rarefied Gas in Micro/Nano Thrusters Using DSMC Method

Lakzian, Elyas | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43902 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Darbandi, Masoud
  7. Abstract:
  8. Progress of technology and the ability of construction of devices in micro and nano scales, have developed a new field of science that the classical laws of fluid dynamics can not be analyzed in by the well known Navier-Stokes Model. So, research fields in micro and nano scales have been paid attention more. In micro and nano scales, due to small size of characteristic length, the fluid is rarefied and the behavior of the fluid and its interaction with surfaces and walls in such scales is very different from those in large-scale systems. So, the particle-based-methods like Direct Simulation Monte-Carlo (DSMC) method have been considered one of the most interesting fields of researches for the scientists. Micro/Nano-electro-mechanical systems (MEMS/NEMS) have received great attention in the recent years. It is mainly due to their higher performance compared to their macro counterparts in many applications. They have small sizes and consume and dissipate little energy while offering high sensitivity and great accuracy. Micromixers can be part of such micron-sized systems. Obviously, increasing the mixing performance of micromixers through decreasing the mixing time or distance can improve the overall performance of the system. So, it is necessary to perform studies to get a better understanding of the mixing in microgeometries. One of the application of micro and nano systems is micor and nano thrusters. Due to high sensitivity of theses devices, one of the most important issues is the optimization of the thrust performance . So, it is necessary to study the parameters affecting thrust
  9. Keywords:
  10. Mixer ; Direct Simulation Monte Carlo (DSMC)Method ; Micro/Nano Propulsion System ; Hot Thruster ; Gas Mixing

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