Results 21 to 30 of about 10,536 (218)

DSMC Simulation of the Cometary Coma [PDF]

open access: yesAIP Conference Proceedings, 2003
The study of the comet coma, or its tenuous atmosphere, is a major space application of rarefied gas dynamics, which requires modeling the gas flow in a wide range of Knudsen number. For weak to moderate comets, only the subsolar region of the coma is in a collision dominated regime.
Tenishev, Valeriy M., Combi, Michael R.
openaire   +2 more sources

Application of Direct Simulation Monte Carlo method in CFD-based erosion prediction

open access: yesYou-qi chuyun, 2021
In order to study the influence of collision between solid particles in gas-solid two-phase flow on erosion, an erosion prediction method based on the Direct Simulation Monte Carlo (DSMC) method for calculation of particle collision and computational ...
Xiaoyang SUN   +3 more
doaj   +1 more source

A hybrid method for hydrodynamic-kinetic flow - Part I -A particle-gridmethod for reducing stochastic noise in kinetic regimes [PDF]

open access: yes, 2011
In this work we present a hybrid particle-grid Monte Carlo method for the Boltzmann equation, which is characterized by a significant reduction of the stochastic noise in the kinetic regime.
Alessandro Alaia   +34 more
core   +1 more source

On the calculation of the electron temperature flowfield in the DSMC studies of ionized re-entry flows

open access: yesAdvances in Aerodynamics, 2020
Currently available procedures of electron temperature calculations in studying ionized flows around reentry spacecraft by the direct simulation Monte Carlo (DSMC) method are analyzed.
Alexander Shevyrin, Yevgeniy Bondar
doaj   +1 more source

Variance Reduction For A Discrete Velocity Gas [PDF]

open access: yes, 2011
We extend a variance reduction technique developed by Baker and Hadjiconstantinou [1] to a discrete velocity gas. In our previous work, the collision integral was evaluated by importance sampling of collision partners [2].
Goldstein, D. B.   +2 more
core   +1 more source

Chatter Mitigation in Milling Process Using Discrete Time Sliding Mode Control with Type 2-Fuzzy Logic System

open access: yesApplied Sciences, 2019
In order to achieve a high-quality machining process with superior productivity, it is very important to tackle the phenomenon of chatter in an effective manner.
Satyam Paul, Ruben Morales-Menendez
doaj   +1 more source

Numerical simulation of 3-D flow around sounding rocket in the lower thermosphere [PDF]

open access: yesAnnales Geophysicae, 2006
Numerical simulations using the Direct Simulation Monte Carlo (DSMC) method are known to be useful for analyses of aerodynamic effects on in-situ rocket measurements in the lower thermosphere, but the DSMC analysis of a spin modulation caused by an ...
J. Kurihara   +3 more
doaj   +1 more source

Transport properties of highly asymmetric hard-sphere mixtures [PDF]

open access: yes, 2009
The static and dynamic properties of binary mixtures of hard spheres with a diameter ratio of sigma(B)/sigma(A)= 0.1 and a mass ratio of m(B)/m(A)= 0.001 are investigated using event driven molecular dynamics.
Bird G. A.   +9 more
core   +2 more sources

Sinusoidal Microchannel with Descending Curves for Varicose Veins Implantation

open access: yesMicromachines, 2018
Approximately 26% of adult people, mostly females, are affected by varicose veins in old age. It is a common reason for distress, loss of efficiency, and worsening living conditions.
Muhammad Javaid Afzal   +4 more
doaj   +1 more source

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

open access: yesIET 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   +1 more
doaj   +1 more source

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