Results 21 to 30 of about 1,767 (181)

Transient Macroscopic Chemistry in the DSMC Method [PDF]

AIP Conference Proceedings, 2008
In the Direct Simulation Monte Carlo method, a combination of statistical and deterministic procedures applied to a finite number of `simulator' particles are used to model rarefied gas-kinetic processes. Traditionally, chemical reactions are modelled using information from specific colliding particle pairs.
M. J. Goldsworthy, M. N. Macrossan, M. Abdel-Jawad, Takashi Abe   +3 more
openaire   +1 more source

Stochastic DSMC method for dense bubbly flows: Methodology

Chemical Engineering Science, 2018
A stochastic Direct Simulation Monte Carlo (DSMC) method has been extended for handling bubble-bubble and bubble-wall collisions. Bubbly flows are generally characterized by highly correlated velocities due to presence of the surrounding liquid. The DSMC method has been improved to account for these kind of correlated collisions along with a treatment ...
Kamath, S. (author), Padding, J.T. (author), Buist, K. A. (author), Kuipers, J.R. (author)   +3 more
openaire   +3 more sources

Application of DSMC method to astrophysical flows [PDF]

Symposium - International Astronomical Union, 2003
The Direct Simulation Monte Carlo (DSMC) method, developed originally to calculate rarefied gas dynamical problems, is applied to continuous flow including shocks assuming that the Knudsen number is sufficiently small. In particular, we study the formation of spiral shocks in the accretion disc of a close binary system.
Takuya Matsuda, Hiromi Mizutani, Henri. M. J. Boffin   +2 more
openaire   +1 more source

Dynamic sliding mode control of single‐stage boost inverter with parametric uncertainties and delay

IET Power Electronics, 2021
Here, a novel control strategy based on sliding mode control for the single‐stage boost inverter is presented. The goal is to achieve a system with robustness against inherent delays and variations in parameters, fast response, and high‐quality AC ...
Farideh Mohammadhassani, Hossein Gholizade Narm   +1 more
doaj   +1 more source

Unsteady Flow Driven by the Counter-Flow Jets of High-Altitude Engine Based on DSMC Simulation

气体物理, 2023
Counter-flow engines are often used for aircraft slowing or separating. In order to study the interaction between the counter-flow jets and free stream at high altitudes, the rarefied flow driven by two counter-flow jets and hypersonic free stream was ...
Jun-lin WU, Zhong-hua LI, Ao-ping PENG, Lang-quan LI, Jie LIANG   +4 more
doaj   +1 more source

Investigation gas behavior inside a gas centrifuge using dsmc code developed and dsmcFOAM solver [PDF]

مجله علوم و فنون هسته‌ای, 2021
To model a gas behavior within a centrifuge machine, a powerful tool is required similarly. With high-speed cover, all the computational limitations for applying the influential derives such as feed, scoop, baffle effects, etc., formed flow regimes ...
S. Yousefi nasab, J. Karimi sabet, J. Safdari, E. Amini, A. Norouzi   +4 more
doaj   +1 more source

Investigation of concentration variation of the components of a three-component gas mixtures in the radial and axial direction of a gas centrifuge machine under “total reflux flow” conditions by using the DSMC method [PDF]

مجله علوم و فنون هسته‌ای, 2019
In this paper, using a new combinatory meshing technique in the axisymmetric coordinate, a MCC-DSMC solver is introduced. Using this solver, the flow and the concentration variation inside a centrifuge machine in a rigid body rotation mode with the DSMC ...
S Yousefi Nasab, J Karimi- Sabet, J Safdari, A Norouzi, E Amini   +4 more
doaj   +1 more source

DSMC modeling of rarefied ionization reactions and applications to hypervelocity spacecraft reentry flows

Advances in Aerodynamics, 2020
The DSMC modeling is developed to simulate three-dimensional (3D) rarefied ionization flows and numerically forecast the communication blackout around spacecraft during hypervelocity reentry.
Ming Fang, Zhi-Hui Li, Zhong-Hua Li, Jie Liang, Yong-Hao Zhang   +4 more
doaj   +1 more source

Modelling, Simulation and Dynamic Sliding Mode Control of a MEMS Gyroscope

Micromachines, 2021
An adaptive dynamic sliding mode control via a backstepping approach for a microelectro mechanical system (MEMS) vibratory z-axis gyroscope is presented in this paper. The time derivative of the control input of the dynamic sliding mode controller (DSMC)
Yunmei Fang, Wen Fu, Cuicui An, Zhuli Yuan, Juntao Fei   +4 more
doaj   +1 more source

A Three-Dimensional DSMC Simulation of Single-Stage Turbomolecular Pump Adopting Accurate Intermolecular Collisions Models

Journal of Fluid Science and Technology, 2006
The single-stage TMP is investigated by the direct simulation Monte Carlo (DSMC) method with a three dimensional analysis in a rotating reference frame.
Sheng WANG, Hisashi NINOKATA
doaj   +1 more source