نتایج جستجو برای: lammps

تعداد نتایج: 171  

2012
Nicola Varini Christian R. Trott

Classical equilibrium molecular dynamics (MD) simulations have been performed to investigate the computational performance of the Simple Point Charge (SPC) and TIP4P water models applied to simulation of methane hydrates, and also of liquid water, on a variety of specialised hardware platforms, in addition to estimation of various equilibrium properties of clathrate hydrates. The FPGA-based acc...

2013
Sudhir B. Kylasa Hasan Aktulga Ananth Grama Sudhir B Kylasa Hasan Metin Aktulga

We present a parallel/GPU implementation of our open-source reactive molecular dynamics code, PG-PuReMD (Parallel GPU-Purdue Reactive Molecular Dynamics). Using a variety of innovative algorithms and optimizations, PGPuReMD achieves over 350x speedup compared to a single CPU implementation on a cluster of 36 state of the art GPUs. This is a significant development, since it enables simulations ...

Journal: :The Journal of chemical physics 2015
Pierre de Buyl Erik Nies

Classical Molecular Dynamics (MD) simulations provide insight into the properties of many soft-matter systems. In some situations, it is interesting to model the creation of chemical bonds, a process that is not part of the MD framework. In this context, we propose a parallel algorithm for step- and chain-growth polymerization that is based on a generic reaction scheme, works at a given intrins...

Journal: :The Journal of chemical physics 2012
Rolf E Isele-Holder Wayne Mitchell Ahmed E Ismail

For inhomogeneous systems with interfaces, the inclusion of long-range dispersion interactions is necessary to achieve consistency between molecular simulation calculations and experimental results. For accurate and efficient incorporation of these contributions, we have implemented a particle-particle particle-mesh Ewald solver for dispersion (r(-6)) interactions into the LAMMPS molecular dyna...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه زنجان - دانشکده علوم 1391

ما برای یا نانو نوار گرافین به ابعاد 20*5 نانومتر مقدار ضریب رسانش را برابر w/mk 261/1بدست آوردیم. مشاهده کردیم با افزایش دما ضریب رسانش گرمایی نخست افزایش می یابد و سپس شروع به کاهش می کند.با افزایش درازا نیز ضریب رسانش به شکل توانی افزایش مییابد. در بخش مکانیکی مدول یانگ را برای یک نانو نوار گرافین به همین ابعاد 1.09tpa بدست آوردیم. دیدیم با افزایش دما مدول یانگ زیاد شده ولی در دماهای بیشتر ا...

ژورنال: مواد پرانرژی 2019

Cylotrimethylenetrinitramine (RDX), with the chemical formula C3H6N6O6, is an energetic organic molecule used widely in commodities of explosives. Its partial stimulation results in decomposition reaction at very high rate. Molecular dynamic technique and LAMMPS code with ReaxFF-lg were employed to simulate initiation of RDX. Potential energy variations of the system were calculated for five di...

Journal: :International journal of engineering and applied sciences 2021

Boron Nitride Nanotube (BNNT) is a promising nano sized structure with superior electrical, physical, and mechanical properties comparing to Carbon nanotube. Higher Young’s modulus, oxidation resistance, hardness, corrosion durability in high temperature, piezoelectric pyroelectric characteristics are some featured of BNNT. In this paper the critical buckling load investigated. Two different me...

Journal: :Nucleation and Atmospheric Aerosols 2022

It has recently been shown that supersonic 2-crowdions are much more efficient at transferring mass along the crystal lattice compared to classical crowdions. This is so because, when a 2-crowdion moves, not one, but two atoms move high speed simultaneously, and condition of self-focusing propagation fulfilled for higher energies crowdion. interesting analyze how interatomic potentials affect 2...

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