نتایج جستجو برای: Casimir force

تعداد نتایج: 191406  

The Casimir attraction can significantly interfere the physical response of nanoactuators. The intensity of the Casimir force depends on the geometries of interacting bodies. The present paper is dedicated to model the influence of the Casimir attraction on the electrostatic stability of nanoactuators made of cylindrical conductive nanowire/nanotube. An asymptotic solution, based on path-integr...

Journal: :journal of computational applied mechanics 0
kia dastani univ of tehran mahdi moghimi zand univ of tehran

in the current study the effect of casimir force and squeezed film damping on the pull-in instability and dynamic behavior of electrostatically actuated nano and micro electromechanical systems is investigated separately. linear elastic membrane theory is used to model the static and dynamic behavior of system for strip, annular and disk geometries. squeezed film damping effect is modeled using...

Journal: :journal of sciences islamic republic of iran 0

casimir forces of massive ferrnionic dirac fields are calculated for parallel plates geometry in spatial space with dimension d and imposing bag model boundary conditions. it is shown that in the range of ma>>l where m is mass of fields quanta and a is the separation distance of the plates, it is equal to massive bosonic fields casimir force for each degree of freedom. we argue this equality ex...

A. Ghaffari M. R. Tanhayi

In this paper, we study the Casimir effect of a scalar field with Dirichlet boundary condition in some certain topologies. By numerical analysis we show that Casimir energy is a shape-dependent quantity. We also obtain the phase transition in different topologies in which the Casimir force changes from attractive to repulsive or vice versa.  eararqr

Journal: :international journal of mathematical modelling and computations 0
a. ghaffari department of physics, islamic azad university, central tehran branch, po. code 14168-94351, iran. m. r. tanhayi department of physics, islamic azad university, central tehran branch, po. code 14168-94351, iran.

in this paper, we study the casimir effect of a scalar field with dirichlet boundary condition in some certain topologies. by numerical analysis we show that casimir energy is a shape-dependent quantity. we also obtain the phase transition in different topologies in which the casimir force changes from attractive to repulsive or vice versa.  eararqr

In the current study, the effects of Casimir force and squeeze film damping on pull-in instability and dynamic behavior of electrostatically actuated nano and micro electromechanical systems are investigated separately. Linear elastic membrane theory is used to model the static and dynamic behavior of the system for strip, annular and disk geometries. Squeeze film damping is modeled using nonli...

Journal: :journal of sciences islamic republic of iran 0

a heuristic way to calculate the approximate value of the casimir force is introduced

Journal: :journal of optoelectronical nano structures 0
mohammad ghalambaz department of mechanical engineering, dezful branch, islamic azad university, dezful, iran.c research center. ali j chamkha mechanical engineering department, prince mohammad bin fahd university (pmu) p.o. box 1664 al-khobar 31952, kingdom of saudi arabia mehdi ghalambaz department of mechanical engineering, dezful branch, islamic azad university, dezful, iran.c research center. mohammad edalatifar department of electrical engineering, dezful branch, islamic azad university, dezful, iran.

the natural frequency and pull-in instability of clamped-clamped nano-actuators in the presence of a dielectric layer are analyzed. the influence of the presence of casimir force, electrostatic force, fringing field effect, axial force, stretching effects and the size effect are taken into account. the governing equation of the dynamic response of the actuator is transformed in a non-dimensiona...

A heuristic way to calculate the approximate value of the Casimir force is introduced

Casimir forces of massive ferrnionic Dirac fields are calculated for parallel plates geometry in spatial space with dimension d and imposing bag model boundary conditions. It is shown that in the range of ma>>l where m is mass of fields quanta and a is the separation distance of the plates, it is equal to massive bosonic fields Casimir force for each degree of freedom. We argue this equalit...

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