نتایج جستجو برای: size effect parameter

تعداد نتایج: 2276401  

The effect of sample size on the melting parameter of simulated potassium chloride microcrystal is investigated by molecular dynamics simulation. The size of microcrystal is varied from 8 to 4096 ions. The increase in melting temperature with sample size was found to be in good agreement with the theory.

G.H Rahimi G.R Faghani M Ghalami-Choobar M Zarei,

In this paper, axisymmetric free vibration analysis of a circular Nano-plate having variable thickness was studied. The variation in thickness of plate was considered as a linearly in radial direction. Nonlocal elasticity theory was utilized to take into account size-dependent effects. Ritz functions was utilized to obtain the frequency equations for simply supported and clamped boundary. To ve...

Journal: :تحقیقات مهندسی کشاورزی 0
علی اصغر خوشنود یزدی مربی آموزشکده کشاورزی شیروان، دانشگاه فردوسی مشهد بیژن قهرمان استادیار گروه آبیاری دانشکده کشاورزی، دانشگاه فردوسی مشهد

the arya and paris model is a commonly accepted method to translate a particle-size distribution curve into a corresponding soil moisture characteristic curve using scaling parameter (α). the scaling parameter, in the original model of arya and paris (1981), was assumed constant (α=1.38) for all soil texture classes. in recent years, several studies have shown that α is not constant and its qua...

Journal: :journal of agricultural science and technology 0
s. rezazi laboratory of biomaterials and transport phenomena (lbmtp), faculty of science and technology, university of medea, street ain d'heb, medea, algeria s. hanini laboratory of biomaterials and transport phenomena (lbmtp), faculty of science and technology, university of medea, street ain d'heb, medea, algeria c. si-moussa laboratory of biomaterials and transport phenomena (lbmtp), faculty of science and technology, university of medea, street ain d'heb, medea, algeria s. abdelmalek hassiba benbouali university of chlef, faculty of technologies, department of electronics, ouled fares-chlef, algeria.

recently, increasing attention has been directed to the isolation of natural active components from various medicinal plants. in the present research, the extraction of essential oil from horehound (m. vulgare l.) is presented. effects of mass ratio and particle size on the process performance were studied and kinetics were determined. the chemical composition of the volatiles present in m. vul...

Journal: :Rocky Mountain Journal of Mathematics 1995

حکیمی, محسن, خواجه‌امینیان, محسن,

Arc-melting with ball milling was used for preparing Fe2CoGa1+x and Co2FeGa1+x (x=0,0.2) Heusler samples. Effect of extra nonmagnetic Ga atoms on lattice ordering and magnetic properties of Fe2CoGa and Co2FeGa Heusler compounds was studied. Rietveld refinement showed that lattice parameter of the samples increases in the presence of extra Ga atoms. Results showed that Co2FeGa1.2 has a partial ...

ژورنال: مواد پرانرژی 2014

Investigation shows that the some complex and expanded parameters are effective on the burning rate. In this paper we evaluate the effect of particles dispersion, size of AP particle, the size of Al particles, Fe2O3, viscosity, shape factor, the size of mixer and the mechanical parameters such as tensile and stress on the burning rate. These studies show that the decrease of AP particles, size ...

Journal: :journal of computational applied mechanics 0
naser kordani university of mazandaran [email protected] abdolhossein fereidoon university of semnan mehdi divsalar semnan university ali farajpour department of mechanical engineering, college of engineering, university of tehran, tehran, iran

in this paper, a numerical solution procedure is presented for the forced vibration of a piezoelectric nanowire under thermo-electro-mechanical loads based on the nonlocal elasticity theory within the framework of timoshenko beam theory. using hamilton’s principle, the nonlocal governing differential equations are derived. the governing equations and the related boundary conditions are discreti...

In this paper, we analyze the thermal radiation and chemical reaction impacts on MHD peristaltic motion of the Eyring-Powell fluid through a porous medium in a channel with compliant walls under slip conditions for velocity, temperature, and concentration. Assumptions of a long wave length and low Reynolds number are considered. The modeled equations are computed by using the perturbation metho...

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