Nonlinear Solution
Active control of superposition of waves with time lagging and frequency difference: Numerical simulation

Yu Maan Kong; Wah Yen Tey

Volume 13, Issue 1 , September 2023, , Pages 103-112

  The theory of superposition of waves has been widely deployed in many engineering applications such as medical imaging, engineering measurements, and wave propagation in structures. However, these applications are prone to the interference of unwanted waves. The root cause of the weakness could be ascribable ...  Read More

Heat and Mass Transfer
Study of the effect of the boundary layer excitation in the nanofluids flow inside the tube on increasing the heat transfer coefficient

Javad Zareei; Seyyed Hissein Hoseyni; marischa Elveny

Volume 12, Issue 1 , August 2022, , Pages 109-119

  In this paper, the effect of boundary layer excitation on increasing the heat transfer coefficient of water/carbon nanotube (CNT) nanofluid and water/aluminum oxide (Al2O3) nanoparticles has been investigated. The turbulent flow equations inside the pipe with RNG K-ε turbulence model are solved ...  Read More

LabVIEW implementation of an enhanced nonlinear PID controller based on harmony search for one-stage servomechanism system

Mohamed Shamseldin; Mohamed Sallam; Abd Halim Bassiuny; Abdel Ghany Mohamed

Volume 10, Issue 1 , September 2020, , Pages 111-123

  This paper presents a practical implementation for a new formula of nonlinear PID (NPID) control. The purpose of the controller is to accurately trace a preselected position reference of one stage servomechanism system. The possibility of developing a transfer function model for experimental setup is ...  Read More

Internal Combustion Engine
Effect of fuel injection pressure of microalgae spirulina biodiesel blends on engine characteristics

Upendra Rajak; Prerana Nashine; Tikendra Nath Verma

Volume 11, Issue 1 , September 2021, , Pages 113-125

  The unvarying condition diesel engines used for commercial applications, transportation and industries lead to the crisis of petroleum fuel diminution and ecological squalor caused due to exhaust gases. Therefore, in this paper optimization of the use of MSB in naturally aspirated, direct injection diesel ...  Read More

Fluid Mechanics
Combined effect of hall current and chemical reaction on MHD flow through porous medium with heat generation past an impulsively started vertical plate with constant wall temperature and mass diffusion

NEETU KANAUJIA; uday singh rajput

Volume 9, Issue 1 , September 2019, , Pages 121-132

  Unsteady flow with magneto-hydrodynamics and heat generation through porous medium past an impulsively started vertical plate with constant wall temperature and mass diffusion is considered here. The effect studied is a combination of Hall current and chemical reaction. The motivation behind this study ...  Read More

Heat and Mass Transfer
Flow field, heat transfer and entropy generation of nanofluid in a microchannel using the finite volume method

Majid Kerdarian; Ehsan Kianpour

Volume 8, Issue 2 , February 2019, , Pages 211-222

  In this study, the finite volume method and the SIMPLER algorithm is employed to investigate forced convection and entropy generation of Cu-water nanofluid in a parallel plate microchannel. There are four obstacles through the microchannel, and the slip velocity and temperature jump boundary conditions ...  Read More

Heat and Mass Transfer
Heat transfer in MHD nanofluid flow over a cone and plate in the presence of heat source/sink

Sandeep Naramgari; Raju C.S.K; Jagadeesh Kumar M.S

Volume 7, Issue 2 , March 2018, , Pages 223-241

  In this study, we presented a mathematical model for analyzing the heat source/sink effect on magnetohydrodynamic two-dimensional ferrofluid flow past a cone and a vertical plate in the presence of volume fraction of ferrous nanoparticles. The governing partial differential equations are transformed ...  Read More

Dynamic Response
Dynamic analysis of multi-body dynamics model of the mold oscillator including self-excitation of the supporting system

Yonghui Park

Volume 13, Issue 2 , March 2024, , Pages 229-239

  A hydraulically driven mold oscillator is challenging to estimate the dynamic state variables precisely. Significantly, the additional stiffness effect of hydraulic oil is variable according to operating conditions, and it is hard to formulate it as a mathematical expression. This study investigates ...  Read More

Energy Science and Technology
Unsteady state numerical study of carbon deposition on the performance of solid oxide fuel cell and variation of porosity

Hamed Khoshkam; Kazem Atashkari; Mehdi Borji

Volume 12, Issue 2 , February 2023, , Pages 247-261

  Carbon deposition has a serious effect on the failure mechanism of solid oxide fuel cells. A comprehensive investigation based on a two-dimensional model of a solid oxide fuel cell with the detailed electrochemical model is presented to study the mechanism and effects of carbon deposition and unsteady ...  Read More

Fluid Mechanics
Magneto Prandtl nanofluid past a stretching surface with non-linear radiation and chemical reaction

Ganesh Kumar; Ramesh G K; Sabir Ali Shehzad; Gireesha B.J

Volume 9, Issue 2 , February 2020, , Pages 275-285

  In this article, we examined the behavior of chemical reaction effect on a magnetohydrodynamic Prandtl nanofluid flow due to stretchable sheet. Non-linear thermally radiative term is accounted in energy equation. Constructive transformation is adopted to formulate the ordinary coupled differential equations ...  Read More

Manufacturing Processes
Application of image-based acquisition techniques for additive manufacturing using canny edge detection

Ahalya Ravendran; Suchada Rianmora

Volume 10, Issue 2 , April 2021, , Pages 391-404

  Edge is an indispensable characteristic of an image, defined as the contour between two regions with significant variance in terms of surface reflectance, illumination, intensity, color, and texture. Detection of edges is a basic requirement for diverse contexts for design automation. This study presents ...  Read More

Computational Fluid Dynamics (CFD)
Numerical investigation on cooling performance of a twisted gas turbine blade with leading edge cooling holes

Mithilesh K Sahu; Moughbul Basha Shaik

Volume 11, Issue 2 , March 2022, , Pages 397-407

  The new and advance technologies for higher performance and lower maintenance are required to operate  gas turbines at higher operating temperatures. Higher turbine inlet temperature results in higher blade metal temperatures. These variations in temperatures of the blade material must be limited ...  Read More

An efficient finite difference time domain algorithm for band structure calculations of Phononic crystal

M. Moradi; M. Bagheri Nouri

Volume 6, Issue 2 , June 2017, , Pages 93-101

  In this paper, a new algorithm for studying elastic wave propagation in the phononic crystals is presented. At first, the displacement-based forms of elastic wave equations are derived and then the forms are discretized using finite difference method. So the new algorithm is called the displacement-based ...  Read More

Presenting Three Design Methods for Axial Compressor Blade via Optimization

Omid Fathi; Hadi Kargarsharifabad

Volume 8, Issue 1 , September 2018, , Pages 107-120

  Improving the efficiency of compressors has been one of the most important goals of researchers over the years. In this paper, three different methods are presented for parameterization and blade optimization of axial flow compressor. All methods consist of flow analysis tool, optimization algorithms, ...  Read More

Micro and Nano Systems
The effect of small scale and intermolecular forces on the nonlinear Pull-in instability behavior of nano-switches using differential quadrature method

Yaghoub Tadi Beni; Seyyed Mohammad Fatemi

Volume 7, Issue 1 , August 2017, , Pages 109-125

  Using differential quadrature method (DQM), this study investigated pull-in instability of beam-type nano-switches under the effects of small-scale and intermolecular forces including the van der Waals (vdW) and the Casimir forces. In these nano-switches, electrostatic forces served as the driving force, ...  Read More

Composite Materials
Investigating the effect of different anisotropic surface roughening methods on ionic polymer metal composites behavior

Amirmehdi Mosaddeghi; Hamid Soleimanimehr; Ali Alinia ziazi

Volume 13, Issue 1 , September 2023, , Pages 113-121

  As the smart materials, ionic polymer-metal composites (IPMCs), have a layered structure consisting of a polymeric membrane based on perfluorinated alkene, which is sandwiched between two noble metal-based electrodes, such as gold and platinum, and they can be bent significantly under applying a low-range ...  Read More

Bearing fault prognostics using Takagi-Sugeno of extended fuzzy with recursive least square algorithms

Henry Ogbemudia Omoregbee; Modestus O. Okwu; Mabel U. Olanipekun; Bright A Edward

Volume 12, Issue 1 , August 2022, , Pages 121-132

  This paper presents the detection of fault prognostics in bearings with the application of extended Takagi-Sugeno fuzzy recursive least square algorithms (exTSFRLSA). The nonlinear system is decomposed into a multi-model structure, consisting of linear models that are not inherently independent, due ...  Read More

Manufacturing Processes
Investigation of hot metal gas forming process of square parts

Mehrdad Nasrollahzade; Seyed Jalal Hashemi; Hassan Moslemi Naeini; Amirhosein Roohi; Shahryar Imani Shahabad

Volume 10, Issue 1 , September 2020, , Pages 125-138

  Aluminum alloys are considered a lot in the automotive and aerospace industry because of their high strength to weight ratio. In this manuscript, the gas forming process of aluminum AA6063 tubes at high temperatures up to 500°C is investigated, through experimental and numerical tests. Therefore, ...  Read More

Impact Mechanics
Numerical investigation and optimization of the mechanical behavior of thin-walled tubes with combined geometric

Farshid Kholoosi; Saman Jafari; Mahdi Karimi

Volume 11, Issue 1 , September 2021, , Pages 127-138

  In this study, the crushing behavior and energy absorption of various thin-walled structures under quasi-static loading are investigated. Some experimental data from similar work are used for the validation of a simulated model. Some samples are designed and considered with different combined geometries. ...  Read More

Perturbation Technique
Entropy generation analysis of non-newtonian fluid in rotational flow

Abbas Kosarineia

Volume 9, Issue 1 , September 2019, , Pages 133-144

  The entropy generation analysis of non-Newtonian fluid in rotational flow between two concentric cylinders is examined when the outer cylinder is fixed and the inner cylinder is revolved with a constant angular speed. The viscosity of non-Newtonian fluid is considered at the same time interdependent ...  Read More

Computational Fluid Dynamics (CFD)
Three-dimensional characteristic approach for incompressible thermo-flows and influence of artificial compressibility parameter

Tohid Adibi

Volume 8, Issue 2 , February 2019, , Pages 223-234

  In this paper the characteristics of unsteady three-dimensional incompressible flows with heat transfer are obtained along with artificial compressibility of Chorin. At first, compatibility equations and pseudo characteristics for three-dimensional flows are derived from five governing equations (continuity ...  Read More

Application of combined mathematical modeling/optimization methods coupled pitch controller in wind turbine using hybrid MLP neural network and firefly algorithm

Ehsanolah Assareh; Iman Poultangari; Afshin Ghanbarzadeh

Volume 13, Issue 2 , March 2024, , Pages 241-250

  A common method utilized in wind turbines is pitch angle control whereby via varying the angle of wind turbine blades around their own axis, power generated at high speeds of wind is held around maximum amount and is kept away from the severe mechanical stress on wind turbine. In current study, in order ...  Read More

Fracture Mechanics
A novel modification of decouple scaled boundary finite element method in fracture mechanics problems

Mahdi Yazdani

Volume 7, Issue 2 , March 2018, , Pages 243-260

  In fracture mechanics and failure analysis, cracked media energy and consequently stress intensity factors (SIFs) play a crucial and significant role. Based on linear elastic fracture mechanics (LEFM), the SIFs and energy of cracked media may be estimated. This study presents the novel modification of ...  Read More

Numerical simulation of aspect ratio effect of the rectangular cylinder on the aerodynamic noise

Sarallah Abbasi

Volume 12, Issue 2 , February 2023, , Pages 263-273

  The purpose of this paper is to investigate the effect of aspect ratio on vortex shedding, and transient flow-induced noise over a rectangular cylinder is presented. The freestream velocity is assumed 50 m/s. URANS equations with turbulence model  are employed to flow analysis. Aerodynamic noise ...  Read More

Compressible Flow
Effect of blade profile on the performance characteristics of axial compressor in design condition

Sarallah Abbasi; ali joodaki

Volume 9, Issue 2 , February 2020, , Pages 287-296

  The choice of geometrical shape of the blades has a considerable effect on aerodynamic performance and flow characteristics in axial compressors. In this paper, the effects of the blades shape on the aerodynamic design characteristics are investigated based on Streamline Curvature Method (SCM). Initially, ...  Read More