Molecular dynamics simulation of a piston driven shock wave in a hard sphere gas
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National Aeronautics and Space Administration, National Technical Information Service, distributor , [Washington, DC, Springfield, Va
Computerized simulation., Gas dynamics., Mach number., Molecular dynamics., Shock wave profiles., Shock wave propagation., Shock w
|Statement||Myeung-Jouh Woo and Isaac Greber.|
|Series||NASA contractor report -- 195463., NASA contractor report -- NASA CR-195463.|
|Contributions||Greber, Isaac., United States. National Aeronautics and Space Administration.|
|The Physical Object|
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SHOCK WAVE IN A HARD SPHERE GAS Abstract by MYEUNG-JOUH WOO Molecular dynamics simulation is used to study the piston driven shock wave at Mach3, and A shock tube, whose shape is a circular cylinder, is filled with hard sphere molecules having a Maxwellian thermal velocity distribution and zero mean velocity.
The piston moves and a. Get this from a library. Molecular dynamics simulation of a piston driven shock wave in a hard sphere gas. [Myeung-Jouh Woo; Isaac Greber; United States. National Aeronautics and Space Administration.]. We study the structure of a normal shock wave in noble gas mixtures (Xe-He and Ar-He) of various compositions using molecular dynamics and direct simulation Monte Carlo.
The molecular dynamics simulations are first validated against experimental data. Molecular dynamics simulations of shock waves in mixtures of noble gases. / Valentini Cited by: Therefore, molecular interaction based simulations are often used to properly express velocity and temperature slips at high Knudsen numbers (Kn) seen at dilute gases or narrow channels.
In this study, an event-driven molecular dynamics (EDMD) simulation is proposed to estimate properties of hard-sphere gas by: 8. We study the structure of a normal shock wave in noble gas mixtures (Xe-He and Ar-He) of various compositions using molecular dynamics and direct simulation Monte Carlo.
Molecular dynamics simulation of a piston–driven shock wave. Physics of Fluids (Gallery of Fluid Motion), 7 (9): S6, Google Scholar. Woo and I. Greber. Molecular dynamics simulation of piston-driven shock wave in hard sphere gas.
AIAA Journal, 37 (2): – () Molecular dynamics of shock waves in dense fluids. In Author: S. Schlamp, B.C. Hathorn. Research Article Event-Driven Molecular Dynamics Simulation of Hard-Sphere Gas Flows in Microchannels VolkanRamazanAkkaya 1,2 andIlyasKandemir 2 Department of Energy Systems Engineering, Mu gla S tk Koc ¸man University, Mu gla, Turkey.
Large-scale molecular dynamics simulations of a M s = shock in dense argon (q = kg/m 3, T = K) and a M s = shock in dense nitrogen (q = kg/m 3, T = K) have been performed. “ A combined eventdriven/ time-driven molecular dynamics algorithm for the simulation of shock waves in rarefied gases.
” Journal of Computational Physics (23), – Valentini, P., and Schwartzentruber, T. (b).Cited by: quadrupoles etc.) of the molecules on the shock wave structure.
Key words: Shock structure, Dense media, Molecular Dynamics. Introduction The structure of shock waves in dense media has already been investigated by a number of authors (see e.g.  and ). The method used most frequently was the Molecular Dynamics simulation.
Shock waves (1) • A shock is a surface of discontinuity of material velocity propagating in a continuous medium1-Can be formed by an impact. Davison, L. “High-Pressure Shock Compression of Solids VI”, Springer-Verlag, (). Porous materials have long been known to be effective in blast mitigation strategies.
Nano-structured materials appear to have an even greater potential for blast mitigation because of their high surface-to-volume ratio, a geometric factor which substantially attenuates shock wave propagation. A molecular dynamics approach was used to explore the effects of this remarkable property on the Cited by: 6.
American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA complicated shock wave structure near the shock front, compared with the results of classical molecular dynamics simulation. Charge separation can bring about accumulation of net charges on the large scale, instead of the formation of a localized dipole layer, which.
Gas kinetics is a science in the branch of fluid dynamics, concerned with the study of motion of gases and its effects on physical on the principles of fluid mechanics and thermodynamics, gas dynamics arises from the studies of gas flows in transonic and supersonic distinguish itself from other sciences in fluid dynamics, the studies in gas dynamics are often defined.
The mechanisms involved in pressure-driven gas permeation through a micropore on vitreous SiO 2 membranes were examined molecular dynamics (MD) simulation.
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Virtual amorphous SiO 2 membranes were prepared by the melt-quench method utilizing modified Born–Mayer–Huggins (BMH) pair potential and Stillinger–Weber (SW) three-body interactions.
A dual control plane non-equilibrium MD (DCP Cited by: Piston-Generated Expansion Wave Up: One-Dimensional Compressible Inviscid Flow Previous: Normal Shocks Piston-Generated Shock Wave Consider the situation illustrated in Figure in which, at, a tight-fitting piston is suddenly pushed into a stationary gas, contained in a uniform tube, at the steady speed, generating a shock front that propagates away from the piston, and into the gas, at.
Introduced in for a hard sphere (HS) gas, the DSMC method of Bird represents a particularly valuable and efficient tool to investigate the nonequilibrium structure of the normal shock wave.
The method is valid for dilute gases, and full-scale simulations of normal shock waves matching the experimental conditions are very easily run on a Cited by: The Dynamic Molecular Collision (DMC) model is constructed for accurate and realistic simulations of rarefied gas flows of nonpolar diatomic molecules by the Direct Simulation Monte Carlo (DSMC) method.
This model is applicable for moderate temperatures (up to a few hundred K for nitrogen), where most molecules are in the vibrational ground state and the vibrational degree of freedom can be Cited by: Large-scale molecular dynamics (MD) simulations using the Lennard-Jones potential are performed to study the structure of normal shock waves in dilute argon.
Nonperiodic boundary conditions in the flow direction are applied by coupling the MD domain with a two-dimensional finite-volume computational fluid dynamics (CFD) solver to correctly generate the inflow and outflow particle by: Computer molecular-dynamics simulations based on the Born-Maier-Huggins' and Poling's potential models has been used to study the shock-compression phenomena.
Introduction This work is an extending development of our investigations on molecular dynamics simulation of contact melting [ ]. wave and the induced chemical reaction by molecular dynamics simulations of hard disks in elastic collision in a contracting circular piston.
We systematically compare the descriptions based on Euler’s equations and the Navier-Stokes equations with molecular dynamics simulations. Molecular dynamics is very appropriate for the study of an.
Basic Concepts of Fluid Mechanics Astrophysical Dynamics, VT Gas Dynamics: Basic Equations, Waves and ShocksFile Size: 2MB.
Description Molecular dynamics simulation of a piston driven shock wave in a hard sphere gas EPUB
Numerical Simulation of Shock Wave Structure in Gas Explosion Zhang Liconga Zhang Yulonga,b Xu Jingdea Yang Gengyua Hou Shiqiangb Yang Liu2ba* a North China Institute of Science and Technology,Beijing and ,China bChina Huanqiu Contracting & Engineering Corp,Beijing and ,China Abstract.
The simulations of shock wave propagation revealed four regimes of material response. They are: (a) a pure elastic shock wave at piston velocities Up 10, ^oo °Q°o°nnaQQaDnQog' o OshEardtli)miali(m D a elastic ^ 'i anomalous c rchvbridizatiiiii _!_ 2 4 6 Particle Velocity (kiii.'s) FIGURE 1.
simulation was completed when the shock wave reached the far surface of the system. The technique was used successfully in Lennard-Jonesium systems, although it was found that the strength of the shock waves began to probe the unphysical region of the.
The simulations of shock wave propagation revealed four regimes of material response. They are: (a) a pure elastic shock wave at piston velocities up Cited by: 3. An Analytical Calculation of Strong Shock Wave for Frozen Compressible Gas Flow Produced By Plane Piston.
Kamyar Mansour. Department of Aerospace Engineering. Amir Kabir University of Technology Tehran, Iran,and. Flow Research and Engineering. Maplewood Avenue, Palo Alto, CA [email protected] r. Abstract: The time. Shock dynamics of strong imploding cylindrical and spherical shock waves with non-ideal gas effects R K Anand Wave Motion (),Cited by: 4.
IN THE PRESENCE OF GAS Let us consider the process of simulation of the cavitation strength of a liquid with dissolved gas by the molecular dynamics methods. The simulation region is a cube with the sizes L x = L y = L z = Å containing particles.
At the initial instant, particles are dis-tributed uniformly over the entire simulation. Hydrodynamic properties and structure of strong shock waves in classical dense helium are simulated using non-equilibrium molecular dynamics methods.
The shock speed in the simulation reaches km/s and the Mach number is overwhich are close to the parameters of shock waves in the implosion process of inertial confinement by: this generated wave of higher amplitude is called a shock wave.
Table lists the difference between sound waves and shock waves. Mach number The Mach number is the ratio of the speed of a fluid particle in a medium to the speed of sound in that medium .THEORY OF SHOCK WAVES AND INTRODUCTION TO GAS DYNAMICS [Ya. B.
Zeldovich] on *FREE* shipping on qualifying offers.
Details Molecular dynamics simulation of a piston driven shock wave in a hard sphere gas EPUB
THEORY OF SHOCK WAVES AND INTRODUCTION TO GAS DYNAMICSAuthor: Ya. B. Zeldovich.
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