Volume 23, Issue 5
مرور بر اساس
ارسال های اخیر

E ect of anisotropy and piezoelectricity on the forcefrequency coe cient of ATcut quartz crystals
(Sharif University of Technology, 20161001)A clear understanding of forcefrequency e ect is essential for enhancing the accuracy of quartz crystal resonators and sensors. Several analytical models have been developed to predict the frequency change of piezoelectric ...

Advanced exergy and exergoeconomic analyses of Kalina cycle integrated with parabolictrough solar collectors
(Sharif University of Technology, 20161001)This research deals with the performance and cost assessment of a Kalina cycle integrated with ParabolicTrough Solar Collectors (PTSC) using advanced exergy and exergoeconomic based methods to identify the improvement ...

Investigation of the e ects of the weld groove shape on the residual stress formation in the buttwelded plates
(Sharif University of Technology, 20161001)In this investigation, nite element technique and experimental method were utilized for analyzing the residual stresses created during the welding process of plates. In this way, a welded specimen was prepared with ...

Nonaxisymmetric stagnationpoint flow and heat transfer of a viscous luid on a stationary cylinder
(Sharif University of Technology, 20161001)The steadystate viscous flow and heat transfer in the vicinity of a nonaxisymmetric stagnation point of an in nite stationary cylinder with nonuniform normal transpiration, U0('), and constant wall temperature are ...

Numerical study of conjugate heat transfer in laminar and turbulent nano fluid flow in double pipe heat exchangers
(Sharif University of Technology, 20161001)In this paper, the conjugate heat transfer for waterAl2O3 nano fluid flow in double pipe heat exchangers was numerically modeled. The important parameters such as temperature distribution, local heat transfer coe cient, ...

Aerosol nanoparticle charger simulations and optimizations
(Sharif University of Technology, 20161001)Size distribution of aerosol particles is prevalently obtained through electrical characterization techniques and study of charged particles' dynamics in the presence of electric eld. In this work, a wirecylinder corona ...

A simple method for geometric modelling of biological structures using image processing technique
(Sharif University of Technology, 20161001)The exceptional mechanical performance and outstanding material properties of biological structures have attracted much attention during recent decades. Finite Element (FE) Method is one of the most useful tools for ...

Analytical solutions to nonlinear oscillations of micro/nano beams using higherorder beam theory
(Sharif University of Technology, 20161001)In this study, the nonlinear oscillations of micro/nano beams, modeled by Timoshenko beam theory and actuated by suddenly applied electrostatic forces, are investigated. The e ects of electrostatic actuation, residual ...

Determination of ship maneuvering hydrodynamic coe cients using system identi cation technique based on freerunning model test
(Sharif University of Technology, 20161001)In the recent years, di erent mathematical models have been suggested for maneuvering of displacement vessels that are capable of estimation of vessel maneuvers with acceptable precision. These mathematical models are based ...

Investigation of fluid flow and heat transfer of compressible flow in a constricted microchannel
(Sharif University of Technology, 20161001)Heat transfer and hydrodynamics of air flow in a constricted microchannel are numerically investigated by considering the e ect of geometry, stagnation pressure and temperature at the inlet, and applied heat flux at the ...

A di erential quadrature procedure for free vibration of rectangular plates involving free corners
(Sharif University of Technology, 20161001)The Di erential Quadrature Method (DQM) is one of the most powerful approximation methods for analyzing the free vibration of rectangular plates. It is easy to use and straightforward to implement. However, in spite of its ...

Algorithm development for aerodynamic preliminary design of multistage axial compressors
(Sharif University of Technology, 20161001)An algorithm for aerodynamic preliminary design of axial compressors has been developed. The aerodynamic design modules are meanline design and annulus sizing, velocity triangle determination, blade design, and axial ...

Features of flow past a circular cylinder with a slit
(Sharif University of Technology, 20161001)The impact of a slit placed along a circular cylinder diameter, which is parallel to the incoming flow, is numerically investigated in order to nd a geometric modi cation that can help drag reduction, as well as vortex ...

Conceptual duct shape design for horizontalaxis hydrokinetic turbines
(Sharif University of Technology, 20161001)In the present paper, conceptual duct shape design for kinetic energy extraction with hydrokinetic turbines is discussed. The goal is to nd a singlepassage axisymmetric geometry that holds stable flow with maximum kinetic ...