The direct simulation Monte Carlo (DSMC) method for population balance modeling is capable of retaining the history of each simulation particle and is thus able to deal with multivariate properties in a simple and straightforward manner. As opposed to conventional DSMC approaches that track equally weighted simulation particles, a differentially weighted Monte Carlo method is extended to simula...

In some applications of rarefied gas dynamics, including flows in aerospace/space engineering, film deposition technique in semiconductor and micro-reactor in medical science, chemical reactions play an important role and can not be ignored in these simulations. To understand effects of chemical reactions in these fields by experiment is very expensive and impractical. Thus, an appropriate simu...

Parallelization aspects of a two-phase three dimensional Direct Simulation Monte Carlo (DSMC) method for modeling particle-laden gaseous flow in the vicinity of the Head-Disk Interface (HDI) gap in a modern Hard Disk Drive (HDD) enclosure are discussed in this work. Parallel performance metrics have been extracted and compared by executing this method on supercomputing platforms and various mul...

Sliding mode control strategies are well known for ensuring robustness of the system with respect to disturbance and model uncertainties. For continuous-time plants, they achieve this property by confining state a particular hyperplane in space. Contrary this, discrete-time sliding (DSMC) only drive representative point certain vicinity that hyperplane. In established literature on DSMC, width ...

This paper presents the results of numerical studies of rotational-translational nonequilibrium, kinetic, and diffusive processes in spherical expanding gas flows. Computations are made using the direct simulation Monte-Carlo (DSMC) method [1, 2] and the solver [3] of the Navier-Stokes equations in terms of classical and quantum concepts [3-7], at the Knudsen numbers Kn* from 0.0015 to 0.03 and...

The transport characteristics of the unsteady flow field in rarefied plasma plumes is crucial for a pulsed vacuum arc which particle distribution varies from 1016 to 1022 m−3. direct simulation Monte Carlo (DSMC) method and particle-in-cell (PIC) are generally combined study this kind field. DSMC simulates motion neutral particles, while PIC charged ions. A hybrid DSMC/PIC algorithm investigate...

A MODULAR PARTICLE-CONTINUUM NUMERICAL ALGORITHM FORHYPERSONIC NON-EQUILIBRIUM FLOWS byThomas Edward Schwartzentruber Chairperson: Iain D. Boyd Hypersonic vehicles traveling at high altitudes experience conditions ranging fromrarefied to continuum flow. Even within a mostly continuum flow, there may belocal regions of rarefied (or non-equilibrium) flow generated by sharp leading...