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Ali Moradian

Academic rank: Assistant Professor
ORCID:
Education: PhD.
ScopusId: 36551143100
Faculty: Bijar Faculty of Science & Engineering
Address:
Phone: 38239100

Research

Title
A submicron device to rectify a square-wave angular velocity
Type
JournalPaper
Keywords
submicron device , square-wave
Year
2011
Journal EUROPEAN PHYSICAL JOURNAL E
DOI
Researchers Ali Moradian ، Mir faez Miri

Abstract

We study a system composed of two thick dielectric disks separated by a thin layer of an electrolyte solution. Initially both plates have the same surface charge distribution. The surface charge distribution has no rotational symmetry. We show that the top plate experiences a torque τ (θ) if it rotates about its axis by an angle θ. The torque can be controlled by varying the electrolyte concentration, the separation and the surface charge density of the plates. For a specific example of charged rods attached to the plates, we find τ (θ) ∝ sin(4θ). We also study the dynamics of the system. We consider the case where the angular velocity of the bottom disk is a square-wave signal. We find that the average angular velocity of the top disk is not zero.