This paper presents computational results obtained with the direct simulation Monte Carlo DSMC method for several biconic test cases in which shock interactions and ow separation reattachment are key features of the ow Recent ground based experiments have been performed for several biconic con gurations and surface heating rate and pressure measurements have been proposed for code validation st...

In highly adaptive irregular problems such as many Particle-In-Cell (PIC) codes and Direct Simulation Monte Carlo (DSMC) codes, data access patterns may vary from time step to time step. This uctuationmay hinder e cient utilization of distributed memory parallel computers because of the resulting overhead for data redistribution and dynamic load balancing. To e ciently parallelize such adaptive...

In this study, the nonequilibrium effects at the stagnation wall in one-dimensional unsteady micro ow responding to the external sinusoidal oscillation are investigated. The  uctuating behavior of the rareŽ ed medium is simulated by employing the unsteady DSMC method under various conditions with different acoustic Reynolds and Knudsen numbers. As a result, it is found that the nonequilibrium...

A complete mathematical description of oscillatory Couette flows within the framework of kinetic theory is not available in the literature. Motivated by this and their vast engineering applications, we present a parametric study of time-periodic oscillatory Couette flows using the unsteady direct simulation Monte Carlo ~DSMC! method. Computations are performed as a function of the Knudsen ~Kn! ...

This paper presents a dynamic sliding mode control (DSMC) for open-loop unstable chemical or biochemical processes with time delay. The controller is based on the and internal model concepts. proposed DSMC has an P/PD to provide systems disturbance rejection. An identification method approximates nonlinear process first-order delayed (FODUP). reduced-order model(FODUP) used synthesize new contr...

Inspired from the idea of developing lattice Boltzmann method (LBM), a discrete ordinate method (DOM) with streaming and collision processes is presented for simulation of microflows in this work. The current method is quite different from the conventional discrete ordinate method (DOM), unified gas kinetic scheme (UGKS) and discrete unified gas kinetic scheme (DUGKS), in which the finite volum...

Article history: Received 11 December 2008 Received in revised form 26 July 2009 Accepted 19 October 2009 Available online 28 October 2009

A parallel, object oriented Direct Simulation Monte Carlo (DSMC) solver is developed to study the impact of blast waves on arbitrary-shaped bodies. A very natural choice of classes is adopted to design the solver. A 3-D domain decomposition is used to parallalise the code. The Message Passing Interface (MPI) library is used to perform interprocessor communications. Preliminary results of two si...

Abstract. Solar cells have been made from hydrogenated amorphous silicon (a-Si:H) films. The films including Si nanoparticles by 3% in the volume fraction have been found to possess good properties. In order to find the method to control this volume fraction, the motion of Si nanoparticles in the rarefied flow of H2 and SiH4 is examined for a CVD (chemical vapor deposition) reactor by use of th...

Adaptive Mesh and Algorithm Reenement (AMAR) embeds a particle method within a continuum method at the nest level of an adaptive mesh reenement (AMR) hierarchy. The coupling between the particle region and the overlaying continuum grid is algorithmically equivalent to that between the ne and coarse levels of AMR. Direct simulation Monte Carlo (DSMC) is used as the particle algorithm embeded wit...