Results 21 to 30 of about 11,584,139 (161)

Aerodynamic Drag Characteristics of Ultra-Low Orbit Satellites

open access: yesShanghai Jiaotong Daxue xuebao, 2022
Taking the 180~300 km ultra-low orbit satellite as the research object, the aerodynamic drag characteristics of the typical shapes were studied by using the direct simulation Monte Carlo (DSMC) method in the free molecular flow simulation method, which ...
WANG Xiaoliang, YAO Xiaosong, GAO Shuang, LIU Guohua
doaj   +1 more source

The fidelity of DSMC method to analyze the aerothermodynamics of the pure continuum flow regime

open access: yesInternational Journal of Thermofluids, 2020
The statistical probabilistic Direct Simulation Monte Carlo (DSMC) method was developed to interrogate the flow regime, in which thermal non-equilibrium exists and flow properties are non-continuous.
Md. Zahid Hasan
doaj   +1 more source

Particle behavior simulation considering thermophoretic and drag forces by direct simulation Monte Carlo method

open access: yesJournal of Fluid Science and Technology, 2016
A micro size particle behavior considering thermophoretic and drag forces are simulated by using direct simulation Monte Carlo (DSMC) method. The computation time is too high to compute the micro particle movement by conventional DSMC method because the ...
Takao WADA
doaj   +1 more source

A hybrid sliding mode control based on a nonlinear PID surface for nonlinear chemical processes

open access: yesEngineering Science and Technology, an International Journal, 2023
This work formulated and synthesized a hybrid control framework based on sliding mode control and internal model concepts. The resulting design conducts a Dynamic Sliding Mode Control (DSMC) approach based on a Nonlinear PID (NPID) sliding surface.
Mateo Vásquez   +4 more
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

Dimensional Direct Simulation Monte Carlo Simulation of Thruster Plumes [PDF]

open access: yesفصلنامه علوم و فناوری فضایی, 2022
The interaction of thruster plumes with satellite components can have undesirable effects, such as disturbance force/torque, thermal loading, and species deposition in the surfaces.
Hamed Alisadeghi   +2 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

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

open access: yes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   +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]

open access: yesمجله 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   +4 more
doaj   +1 more source

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

open access: yesAdvances 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   +4 more
doaj   +1 more source

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