Fluid Mechanics
A comparative study between two numerical solutions of the Navier-Stokes equations

M. Alemi; R. Maia

Volume 6, Issue 2 , June 2017, , Pages 1-12


  The present study aimed to investigate two numerical solutions of the Navier-Stokes equations. For this purpose, the mentioned flow equations were written in two different formulations, namely (i) velocity-pressure and (ii) vorticity-stream function formulations. Solution algorithms and boundary conditions ...  Read More

Improvement of position measurement for 6R robot using magnetic encoder AS5045

M. H. Ghasemi; A. H. Korayem; S. R. Nekoo; M. H. Korayem

Volume 6, Issue 1 , December 2016, , Pages 11-20


  Recording the variation of joint angles as a feedback to the control unit is frequent in articulated arms. In this paper, magnetic sensor AS5045, which is a contactless encoder, is employed to measure joint angles of 6R robot and the performance of that is examined. The sensor has a low volume, two digital ...  Read More

Composite Materials
Generalized solution of functionally graded hollow cylinder under torsional load

Y. Bayat; M. Alizadeh; A. Bayat

Volume 2, Issue 2 , June 2013, , Pages 23-32


  In this paper, a general solution for torsion of hollow cylinders made of functionally graded materials (FGM) was investigated. The problem was formulated in terms of Prandtl’s stress and, in general, the shear stress and angle of twist were derived. Variations in the material properties such as ...  Read More

Optimizing control motion of a human arm With PSO-PID controller

Mohammad Hossein Bayati Chaleshtari; Elahe Norouzi; Habib Ahmadi

Volume 7, Issue 1 , August 2017, , Pages 23-34


  Functional electrical stimulation (FES) is the most commonly used system for restoring function after spinal cord injury (SCI). In this study, we used a model consists of a joint, two links with one degree of freedom, and two muscles as flexor and extensor of the joint, which simulated in MATLAB using ...  Read More

A CFD analysis of the effects of injection and suction through a perforated square cylinder on some thermo-fluid parameters

Mir Elyad Vakhshouri; Burhan ÇUhadaroğlu

Volume 11, Issue 1 , September 2021, , Pages 23-33


  The effects of uniform injection and suction through the surfaces of a perforated square cylinder on the vortex shedding, heat transfer and some aerodynamic parameters have been investigated numerically. The finite-volume method has been used for solving the Navier-Stokes equations for incompressible ...  Read More

Finite Elements Method (FEM)
A new positive definite semi-discrete mixed finite element solution for parabolic equations

Zuliang Lu*

Volume 2, Issue 1 , December 2012, , Pages 25-30


  In this paper, a positive definite semi-discrete mixed finite element method was presented for two-dimensional parabolic equations. In the new positive definite systems, the gradient equation and flux equations were separated from their scalar unknown equations.  Also, the existence and uniqueness ...  Read More

Assessing different nonlinear analysis methods for free vibrations of initially stressed composite laminated plates

H. M. Panahiha; A. Davar

Volume 5, Issue 1 , December 2015, , Pages 25-35


  In this paper, the nonlinear free vibrations of thin symmetric and non-symmetric cross-ply composite plates subjected to biaxial initial stresses are investigated. Because of their excellent properties such as specific strength and specific stiffness, composite plates have wide applications in aerospace ...  Read More

Fluid Mechanics
Three-Dimensional Boundary Layer Flow and Heat Transfer of a Dusty Fluid Towards a Stretching Sheet with Convective Boundary Conditions

Prasannakumara B.C; Shashikumar N.S; Archana M

Volume 8, Issue 1 , September 2018, , Pages 25-38


  The steady three-dimensional boundary layer flow and heat transfer of a dusty fluid towards a stretching sheet with convective boundary conditions is investigated by using similarity solution approach. The free stream along z-direction impinges on the stretching sheet to produce a flow with different ...  Read More

Manufacturing Processes
Multi-objective optimization and analysis of electrical discharge machining process during micro-hole machining of D3 die steel employing salt mixed de-ionized water dielectric

I. Shivakoti; G. Kibria; S. Diyaley; B. B. Pradhan

Volume 3, Issue 1 , December 2013, , Pages 27-39


  Correct selection of manufacturing condition is one of the most important aspects which should be considered in the majority of manufacturing processes,  particularly in the process related to advanced machining process like electrical discharge machining. In electrical discharge machining (EDM), ...  Read More

Manufacturing Processes
Predictive model for diameter control of polysulfone hollow fibers produced by dry-jet wet spinning

Ali Rugbani

Volume 13, Issue 1 , September 2023, , Pages 27-38


  This research proposes a general formula for implementing in the control system of a dry-jet wet spinning machine to achieve a specific diameter size for Polysulfone hollow fibers. By employing Taguchi method, the effect of the operation parameters on the fiber geometry is investigated. The findings ...  Read More

Variational discretization and mixed methods for semilinear parabolic optimal control problems with integral constraint

Zuliang Lu*

Volume 1, Issue 1 , December 2011, , Pages 29-36


  The aim of this work is to investigate the variational discretization and mixed finite element methods for optimal control problem governed by semi linear parabolic equations with integral constraint. The state and co-state are approximated by the lowest order Raviart-Thomas mixed finite element spaces ...  Read More

Energy Science and Technology
Experimental study of melting of composite phase change materials used in honeycomb energy storage system

Ahmed F Hasan; Salah N Farhan

Volume 12, Issue 1 , August 2022, , Pages 31-40


  Phase change materials have attracted a considerable attention in thermal energy storage research recently due to their thermal characteristic. Composite materials have great potential as one of the best alternative approach that would be utilized to increase the thermal performance of this sort of materials. ...  Read More

Computational Fluid Dynamics (CFD)
Numerical investigation on the effects of six control rods arranged in equilateral triangular configurations on fluid flow and forced convection heat transfer from a circular cylinder

S. Harimi; Azam Marjani

Volume 9, Issue 1 , September 2019, , Pages 33-45


  The present work deals with heat transfer characteristics as well as fluid flow patterns in laminar flow regime for a circular cylinder with six control rods arranged in equilateral triangular geometries. The computations have been carried out by a finite volume approach using the overset grid method. ...  Read More

Heat and Mass Transfer
Entropy generation analysis of MHD forced convective flow through a horizontal porous channel

Pooja Sharma; Tarun Sharma; Navin Kumar

Volume 10, Issue 1 , September 2020, , Pages 37-49


  Entropy generation due to viscous incompressible MHD forced convective dissipative fluid flow through a horizontal channel of finite depth in the existence of an inclined magnetic field and heat source effect has been examined. The governing non-linear partial differential equations for momentum, energy ...  Read More

Fracture Mechanics
A numerical and experimental study on buckling and post-buckling of cracked plates under axial compression load

M. Shariati; A. M. Majd Sabeti; H. Gharooni

Volume 4, Issue 1 , December 2014, , Pages 43-54


  Existence of cracks in industrial structures is one of the important causes of their failure, especially when they are subjected to important axial compressive forces that might lead to buckling. Therefore, it must be considered in stress analysis and designing and loading of such structures. In this ...  Read More

Fluid Mechanics
Buckling of multi wall carbon nanotube cantilevers in the vicinity of graphite sheets using monotone positive method

Aminreza Noghrehabadia; Mohammad Ghalambaza; Afshin Ghanbarzadeh

Volume 1, Issue 2 , June 2012, , Pages 89-98


  In this paper, a monotone positive solution is studied for buckling of a distributed model of multi walled carbon nanotube (MWCNT) cantilevers in the vicinity of thin and thick graphite sheets subject to intermolecular forces. In the modeling of intermolecular forces, Van der Waals forces are taken into ...  Read More

Manufacturing Processes
Optimizing locomotive body structures using imperialist competitive algorithm

Mahdi Ghamami; Masoud Shariat Panahi; Maryam Rezaei

Volume 3, Issue 2 , June 2014, , Pages 105-112


  In today's design, system complexity and increasing demand for safer, more efficient and less costly systems have created new challenges in science and engineering. Locomotives are products which are designed according to market order and technical needs of customers. Accordingly, targets of companies, ...  Read More

Heat and Mass Transfer
Diffusion-thermo effects on MHD free convective radiative and chemically reactive boundary layer flow through a porous medium over a vertical plate

J. Prakash; P. Durga Prasad; R. V. M. S. S. Kiran Kumar; S. V. K. Varma

Volume 5, Issue 2 , June 2016, , Pages 111-126


  The main purpose of this work is to investigate the porous medium and diffusion-thermo effects on unsteady combined convection magneto hydrodynamics boundary layer flow of viscous electrically conducting fluid over a vertical permeable surface embedded in a high porous medium, in the presence of first ...  Read More

Heat and Mass Transfer
Effects of heat generation and thermal radiation on steady MHD flow near a stagnation point on a linear stretching sheet in porous medium and presence of variable thermal conductivity and mass transfer

S. Mohammed Ibrahim; K. Suneetha

Volume 4, Issue 2 , June 2015, , Pages 133-144


  The present paper was aimed to study the effects of variable thermal conductivity and heat generation on the flow of a viscous incompressible electrically conducting fluid in the presence of a uniform transverse magnetic field, thermal radiation, porous medium, mass transfer, and variable free stream ...  Read More

Calculation of lateral velocity estimation and error discrimination for railway wheelset to avoid sliding

Zulfiqar Ali Soomro

Volume 8, Issue 2 , February 2019, , Pages 153-164


  Lateral velocity has very backbone position in the railway vehicle wheelset dynamics as it usually becomes cause of derailment by sliding due to insufficient adhesion ratio. This impropriate balance is pretext owing to contamination and weather procures the disturbances. This perturbation makes hindrances ...  Read More

Internal Combustion Engine
Effect of exhaust gas recirculation and constant pre-heated air temperature on the homogeneous charge compression ignition combustion engine with diesel and wppo 20 blend

R. Jyothu Naik; K. Thirupathi Reddy; S. Vishal Narayanrao

Volume 13, Issue 2 , March 2024, , Pages 157-167


  This article describes an experimental study on fueling the port fuel injection homogeneous charge compression ignition (PFI-HCCI) combustion engine with plastic oil that is generated from waste plastics through the pyrolysis method. This study tested different exhaust gas recirculation (EGR) levels ...  Read More

Computational Fluid Dynamics (CFD)
Analytical study of flow field and heat transfer of a non-Newtonian fluid in an axisymmetric channel with a permeable wall

Ghanbarali Sheikhzadeh; Mahdi Mollamahdi; Mahmoud Abbaszadeh

Volume 7, Issue 2 , March 2018, , Pages 161-173


  In this study, the momentum and energy equations of laminar flow of a non-Newtonian fluid are solved in an axisymmetric porous channel using the least square and Galerkin methods. The bottom plate is heated by an external hot gas, and a coolant fluid is injected into the channel from the upper plate. ...  Read More

Computational Fluid Dynamics (CFD)
SST K-ω based air flow and heat transfer assessment in an infant incubator

Devesh Kumar Baghel; Sobha Lata Sinha; Satish Kumar Dewangan

Volume 12, Issue 2 , February 2023, , Pages 161-175


  Neonatal incubators provide an artificial thermal environment to maintain the thermoregulation of premature babies. Several studies revealed the          dry and latent heat exchange estimation between the newborn's body and the surrounding environment. Heat ...  Read More

Manufacturing Processes
Automatic implementation of a new recovery coefficient for Reliable contour milling

Elhachemi Bahloul

Volume 9, Issue 2 , February 2020, , Pages 199-210


  In contour milling, to render the machining process more automated with significant productivity without remaining material after machining, a new recovery coefficient was developed. The coefficient was inserted in the computation of contour parallel tool paths to fix the radial depth of cut in the way ...  Read More

Mechanism of surface generation in grinding AA6061-TiB2/ZrB2 in-situ composite

A. Mahamani; S. Jawahar; J. P. Davim

Volume 10, Issue 2 , April 2021, , Pages 311-324


  In-situ composites have gained the attention of worldwide researchers in the interest of their greater mechanical properties at the lower reinforcement ratio. Controlling the surface quality of components is a paramount task in the grinding process in order to withstand the creep and fatigue load at ...  Read More