APPLICATION OF THE DSMC METHOD TO HIGH DENSITY MICRO-FLOWS

Open Access
Author:
Titov, Evgeny Vladimirovich
Graduate Program:
Aerospace Engineering
Degree:
Doctor of Philosophy
Document Type:
Dissertation
Date of Defense:
June 04, 2007
Committee Members:
  • Deborah A Levin, Committee Chair
  • Philip John Morris, Committee Member
  • Kenneth Steven Brentner, Committee Member
  • Yoursry Y Azmy, Committee Member
Keywords:
  • DSMC
  • Continuum flow
  • Rarefied gas
  • CFD
Abstract:
This research discusses the application of the Direct Simulation Monte Carlo (DSMC) method to flows in Micro Electro Mechanical devices (MEMS) and the Space Shuttle leading edge reinforced Carbon-Carbon destruction due to the chemically active flows. For the MEMS device application an analysis to optimize the shape and the flow parameters of the micronozzle has been provided in order to increase the device performance. For the Space Shuttle wing problem a technique which predicts the microchannel-crack wall destruction rate has been proposed. The technique helps to ensure the safety of the Space Shuttle orbiter and future complex reentry platforms. Careful study of these complex flows requires a comprehensive suite of tools composed of flow solvers capable of accurately predicting the properties of high gradient flows for a wide range of the flow regimes. In this research a robust Direct Simulation Monte Carlo method (DSMC) in combination with its equilibrium version, designated as eDSMC, has been applied to model these two types of internal flows.