Results 71 to 80 of about 6,525,998 (141)

Numerical Study of Hall Thruster Plume and Sputtering Erosion

Journal of Applied Mathematics, 2012
Potential sputtering erosion caused by the interactions between spacecraft and plasma plume of Hall thrusters is a concern for electric propulsion. In this study, calculation model of Hall thruster’s plume and sputtering erosion is presented.
Li Yan, Ping-Yang Wang, Yang-Hua Ou, Xiao-Lu Kang   +3 more
doaj   +1 more source

Pumping Speed Measurement and Analysis for the Turbo Booster Pump

International Journal of Rotating Machinery, 2004
This study applies testing apparatus and a computational approach to examine a newly designed spiral-grooved turbo booster pump (TBP), which has both volume type and momentum transfer type vacuum pump functions, and is capable of operating at optimum ...
R. Y. Jou, S. C. Tzeng, J. H. Liou
doaj   +1 more source

Numerical Simulation of the Supersonic Flow over Forward-Facing Step in Micro Couette Flow Using Direct Simulation Monte Carlo Method [PDF]

International Journal of Advanced Design and Manufacturing Technology, 2015
This work deals with a numerical study on forward-facing steps situated in a supersonic flow. The primary aim of this paper is to examine the sensitivity of the velocity, density, pressure and temperature due to step-height variations of such forward ...
Sajjad Sattari, Mahsa Jahani, Mofid Gorji-Bandpy   +2 more
doaj  

Evaporation Boundary Conditions for the Linear R13 Equations Based on the Onsager Theory

Entropy, 2018
Due to the failure of the continuum hypothesis for higher Knudsen numbers, rarefied gases and microflows of gases are particularly difficult to model.
Alexander Felix Beckmann, Anirudh Singh Rana, Manuel Torrilhon, Henning Struchtrup   +3 more
doaj   +1 more source

Gas Flow and Heat Transfer in an Enclosure Induced by a Sinusoidal Temperature

Journal of Applied Fluid Mechanics, 2019
The heat transfer and flow characteristics of rarefied gas confined within a square cavity are investigated. The cavity upper-wall is subjected to a symmetrical sinusoidal temperature with respect to its midline.
J. Baliti, M. Hssikou, M. Alaoui
doaj  

Direct Simulation Monte Carlo (Dsmc) Algorithm – A Comparison Of Mathematica Code With Fluent 6.2 For Low Knudsen Number

, 2010
{"references": ["G. A. Bird, Molecular Gas Dynamics and the Direct Simulation of Gas\nFlows, Oxford, London, 1994.", "C. H. Cheng, and F. L. Liao, \"DSMC analysis of rarefied gas flow over a\nrectangular cylinder at all Knudsen numbers\", ASME Journal of Fluids\nEngg., vol. 122, pp. 720-729, Dec. 2000.", "T. Ewart, J. L. Firpo, I. A. Graur, P. Perrier,
Qazi, Nabeel A., Absaar Ul Jabbar, Parvez, Khalid   +2 more
openaire   +2 more sources

Efficient prediction of aerodynamic forces in rarefied flow using convolutional neural network based multi-process method

Machine Learning: Science and Technology
The direct simulation Monte Carlo (DSMC) is a widely used approach for studying aerodynamics effects of rarefied flows, but it is highly time-consuming and may exhibit statistical fluctuations.
Haifeng Huang, Guobiao Cai, Chuanfeng Wei, Baiyi Zhang, Xiang Cui, Yongjia Zhao, Huiyan Weng, Weizong Wang, Lihui Liu, Bijiao He   +9 more
doaj   +1 more source

A New Relaxation Time Model for Lattice Boltzmann Simulation of Nano Couette Flows in Wide Range of Flow Regimes

Journal of Applied Fluid Mechanics, 2019
The standard LBM with the relaxation time is only able to simulate the flow features in continuum and slip regimes. In the present paper, a new relaxation time formulation considering the rarefaction effect on the viscosity for the lattice Boltzmann ...
S. Ghatreh Samani, A. H. Meghdadi Isfahani   +1 more
doaj  

Comprehensive Evaluation of the Massively Parallel Direct Simulation Monte Carlo Kernel “Stochastic Parallel Rarefied-Gas Time-Accurate Analyzer” in Rarefied Hypersonic Flows—Part A: Fundamentals

Computation
The Direct Simulation Monte Carlo (DSMC) method, introduced by Graeme Bird over five decades ago, has become a crucial statistical particle-based technique for simulating low-density gas flows.
Angelos Klothakis, Ioannis K. Nikolos
doaj   +1 more source

Bayesian estimation-based information exchange techniques for coupled Navier-Stokes equation and DSMC algorithms

Kongqi donglixue xuebao
In the calculation process of coupled Navier-Stokes (N-S) equation and direct simulation Monte Carlo (DSMC) algorithms, the DSMC method suffers from a limited number of statistical samples.
Zhonghua Li, Leining Dang, Junlin Wu, Zhihui Li   +3 more
doaj   +1 more source