Heat and Mass Transfer
Numerical analysis of heat transfer enhancement and flow structure of alternating oval tubes by considering different alternate angles under turbulent flow

Hasan Najafi Khaboshan; Hamid Reza Nazif

Volume 9, Issue 2 , February 2020, , Pages 211-223


  In this research, the convective heat transfers of turbulent water fluid flow in alternating oval tubes is studied using computational fluid dynamics. The purpose of the study is to analyze the heat transfer enhancement and secondary internal flows under different alternate angles. Also, comparing the ...  Read More

Characteristics of fish oil biodiesel with the impact of diesel fuel addition on a CI engine

Deepak Kumar Sharma; Tikendra Nath Verma

Volume 10, Issue 2 , April 2021, , Pages 325-336


  The present study focuses on the optimization in the use of non-petroleum fuel derived from waste fish oil fuels, as a replacement for petroleum diesel fuel for compression ignition engine. The study comprises of comparison between results of fish oil biodiesel-diesel blends in a compression ignition ...  Read More

Fracture analysis of pre-cracked and notched thin plates using peridynamic theory

Liela Abbasiniyan; Seyed hamed Hoseini; Shirko faroughi

Volume 11, Issue 2 , March 2022, , Pages 329-338


  In this paper, the crack propagation and branching in the pre-cracked and notched samples have been modeled using nonlocal peridynamic theory. The bond-based peridynamic model has been numerically implemented which make it possible to simulate various features of dynamic brittle fracture such as crack ...  Read More

Heat and Mass Transfer
Chemical reaction and thermal radiation effects on MHD micropolar fluid past a stretching sheet embedded in a non-Darcian porous medium

L. Ramamohan Reddy; M. C. Raju; G. S. S. Raju; S. M. Ibrahim

Volume 6, Issue 2 , June 2017, , Pages 27-46


  The paper aims at investigating the effects of chemical reaction and thermal radiation on the steady two-dimensional laminar flow of viscous incompressible electrically conducting micropolar fluid past a stretching surface embedded in a non-Darcian porous medium. The radiative heat flux is assumed to ...  Read More

Fluid Mechanics
Comparing thermal enhancement of Ag-water and SiO2-water nanofluids over an isothermal stretching sheet with suction or injection

Aminreza Noghrehabadi; Mohammad Ghalambaz; Mehdi Ghalambaz; Afshin Ghanbarzadeh

Volume 2, Issue 1 , December 2012, , Pages 37-49


  In the present paper, the flow and heat transfer of two types of nanofluids, namely, silver-water and silicon dioxide-water, were theoretically analyzed over an isothermal continues stretching sheet. To this purpose, the governing partial differential equations were converted to a set of nonlinear differential ...  Read More

Composite Materials
Optimization of the injection molding process of Derlin 500 composite using ANOVA and grey relational analysis

S. Khalilpourazary; N. Payam

Volume 6, Issue 1 , December 2016, , Pages 39-50


  Warpage and shrinkage control are important factors in proving the quality of thin-wall parts in injection modeling process. In the present paper, grey relational analysis was used in order to optimize these two parameters in manufacturing plastic bush of articulated garden tractor. The material used ...  Read More

Manufacturing Processes
Experimental and numerical investigation on laser bending process
Volume 1, Issue 1 , December 2011, , Pages 45-52


  Laser bending is an advanced process in sheet metal forming in which a laser heat source is used to shape the metal sheet. In this paper, temperature distribution in a mild steel sheet metal is investigated numerically and experimentally. Laser heat source is applied through curved paths in square sheet ...  Read More

Heat and Mass Transfer
Approximate solution of laminar thermal boundary layer over a thin plate heated from below by convection

Aminreza Noghrehabadi; Mohammad Ghalambaz; Amin Samimi

Volume 2, Issue 2 , June 2013, , Pages 45-57


  In this paper, an integration of a symbolic power series method - Padé approximation technique (PS - Padé), was utilized to solve a system of nonlinear differential equations arising from the similarity solution of laminar thermal boundary layer over a flat plate subjected to a convective ...  Read More

Fluid Mechanics
Investigation of fluid flow and heat transfer in tube hot metal gas forming process

Javad Shahbazi Karami; GH. Payganeh

Volume 7, Issue 1 , August 2017, , Pages 47-56


  In this study, hot metal gas forming process of AA6063aluminumtubeis studied with a focus on heat transfer of both fluid and solid phases numerically. An experimental study is simultaneously conducted to validate the numerical method. Some of the most important outputs of the present study, are velocity ...  Read More

Manufacturing Processes
Experimental investigation of EDM process parameters by using Pongamia Pinnata osil blends as dielectric medium

Dastagiri Mabbu -; Srinivasa Rao P.; Madar Valli P.

Volume 11, Issue 1 , September 2021, , Pages 47-56


  Electro Discharge Machining (EDM) is an incredibly recognizable machining for ticklishness profiles in ’difficult to machine ‘materials. In EDM, the material ejection of the cathode is cultivated through exact controlled electric pulse (the flash), which changes the metals of two terminals ...  Read More

Fracture Mechanics
Torsional analysis of an orthotropic long cylinder weakened by multiple axisymmetric cracks

Alireza Hassani; Amin Hassani; Mojtaba Mahmoudi Monfared

Volume 8, Issue 1 , September 2018, , Pages 49-60


  Abstract: The solution to problem of an orthotropic long cylinder subjected to torsional loading is first obtained by means of separation valuables. The cylinder is twisted by two lateral shear tractions and the ends of the cylinder surface of the cylinder are stress-free. First, the domain under consideration ...  Read More

Application of linear and nonlinear vibration absorbers for the nonlinear beam under moving load

Nadia Parandeh Afshar; Farhad S. Samani; Moslem Molaie

Volume 5, Issue 1 , December 2015, , Pages 51-60


  Recently, a large amount of studies have been related to nonlinear systems with multi-degrees of freedom as well as continuous systems. The purpose of this paper is to optimize passive vibration absorbers in linear and nonlinear states for an Euler-Bernoulli beam with a nonlinear vibratory behavior under ...  Read More

Large eddy simulation of non-reactive flow in burners

Mahdi Zakyani

Volume 12, Issue 1 , August 2022, , Pages 51-62


  Large eddy simulations of non-reactive Delft II and Sydney bluff body flow are performed using different sub-grid scale models. Simulation of non-reactive burners is useful when studying flow characteristics inside reactive burners. As turbulent combustion simulation is rather an intricate task, it is ...  Read More

Heat and Mass Transfer
Chemical reaction and radiation effects on MHD free convection flow through a porous medium bounded by a vertical surface with constant heat and mass flux

T. Sudhakar Reddy; M. C. Raju; S. V. K. Varm

Volume 3, Issue 1 , December 2013, , Pages 53-62


  In the present paper, an analysis was carried out to investigate effects of radiation on a free convection flow bounded by a vertical surface embedded in a porous medium with constant suction velocity. It was under the influence of uniform magnetic field in the presence of a homogenous chemical reaction ...  Read More

Hydraulic and Pneumatic Systems
Effect of valve plate silencing grooves on flow and pressure fluctuation in fixed displacement radial piston pump

Lokesh Kumar; Nimai Pada Mandal

Volume 13, Issue 1 , September 2023, , Pages 55-66


  This study focuses on the flow and pressure fluctuations of a fixed displacement radial piston pump with a valve plate with silencing grooves, and the effect of the number of pistons (5, 6, and 7) is investigated. Over the manifolds of the pump, valve plate silencing grooves are regarded as Top Dead ...  Read More

Crashworthiness design of multi-cell tapered tubes using response surface methodology

Sadjad Pirmohammad; Sobhan Esmaeili-Marzdashti; Arameh Eyvazian

Volume 9, Issue 1 , September 2019, , Pages 59-75


  In this article, crashworthiness performance and crushing behavior of tapered structures with four internal reinforcing plates under axial and oblique dynamic loadings have been investigated. These structures have a tapered form with five cross sections of square, hexagonal, octagonal, decagon and circular ...  Read More

Internal Combustion Engine
Investigating the effects of fuel injection strategies in a dual-fuel diesel-H2 compression ignition engine

Ali Shaafi; Mohammad Javad Noroozi; Vahid Manshaei

Volume 10, Issue 1 , September 2020, , Pages 63-71


  In this computational research, the separate and simultaneous impacts of diesel direct injection timing, fuel spraying cone angle, and hydrogen gas addition on combustion characteristics, output emissions, and performance in a single-cylinder direct injection diesel engine was studied. In order to conduct ...  Read More

Heat and Mass Transfer
Experimental and numerical study of heat flux distribution in laser forming of bi-layer sheets

Mohammad Riahi; Mohamad Hoseinpour Gollo; Seiied Nader Ameli Kalkhoran

Volume 4, Issue 1 , December 2014, , Pages 67-79


  Laser forming is a modern process which is mainly used for forming metals. Different Lasers are used in this regard that includes Nd: YAG and CO2. In this study, forming bi-layer sheets of Aluminum/Ceramic by Laser was investigated. Furthermore, effect of Uniform and Gaussian heat flux distribution in ...  Read More

Fluid Mechanics
The numerical simulation of compressible flow in a Shubin nozzle using schemes of Bean-Warming and flux vector splitting

Gh. Payganeh; A. Hadidi; M. Hallaji; N. Garjasi

Volume 1, Issue 2 , June 2012, , Pages 111-118


  Over the last ten years, robustness of schemes has raised an increasing interest among the CFD community. The objective of this article is to solve the quasi-one-dimensional compressible flow inside a “Shubin nozzle” and to investigate Bean-Warming and flux vector splitting methods for numerical ...  Read More

Initial blank design of deep drawn orthotropic materials using inverse finite element method

Hashem Zamanian; Mehdi Bostan Shirin; Ahmad Assempour

Volume 3, Issue 2 , June 2014, , Pages 125-134


  In this work, an inverse finite element formulation was modified for considering material anisotropy in obtaining blank shape and forming severity of deep drawn orthotropic parts. In this procedure, geometry of final part and thickness of initial blank sheet were known. After applying ideal forming formulations ...  Read More

Heat and Mass Transfer
Optimizing naturally driven air flow in a vertical pipe by changing the intensity and location of the wall heat flux

M. Rahimi; M. Khalafi-Salout

Volume 5, Issue 2 , June 2016, , Pages 137-145


  Heat transfer from the internal surfaces of a vertical pipe to the adjacent air gives rise to the air flow establishment within the pipe. With the aim of optimizing the convective air flow rate in a vertical pipe, the details of the flow and thermal fields were investigated in the present study. Conservation ...  Read More

Derivation of turbulent energy of fiber suspensions

S. F. Ahmed; M. S. A. Sarker Sarker

Volume 4, Issue 2 , June 2015, , Pages 155-163


  The energy equation for turbulent flow of fiber suspensions was derived in terms of second order correlation tensors. Fiber motion of turbulent energy including the correlation between pressure fluctuations and velocity fluctuations was discussed at two points of flow field, at which the correlation ...  Read More

Fuzzy gain scheduling of PID controller for stiction compensation in pneumatic control valve

Pardeep kumar Rohilla; Feras Hakkak; Vineet Kumar

Volume 8, Issue 2 , February 2019, , Pages 165-174


  Inherent nonlinearities like, deadband, stiction and hysteresis in control valves degenerate plant performance. Valve stiction standouts as a more widely recognized reason for poor execution in control loops. Measurement of valve stiction is essential to maintain scheduling. For industrial scenarios, ...  Read More

Computational Fluid Dynamics (CFD)
Evaluation of omega-shaped Coriolis mass flow meter for laminar flow

Vikram Ashok Kolhe; Vishal D Chaudhari; Suyash Yashwant Pawar; Ravindra L Edlabadkar; Kailas Chandratre

Volume 13, Issue 2 , March 2024, , Pages 181-190


  Measuring flow rate precisely in laminar flow has been a difficult task, especially when utilizing a Coriolis mass flow meter (CMFM) for low flow rate measurements. The meter often under reads the mass flow rate, making it less useful in these conditions. The dominant factor affecting the CMFM's performance ...  Read More

Optimization of gas metal arcwelding parameters of SS304 austenitic steel by Taguchi –Grey relational analysis

Saadat Ali Rizvi; S P Tewari

Volume 7, Issue 2 , March 2018, , Pages 189-198


  This study investigated the optimization of three welding parameters (wire feed speed, arc voltage, and shielding gas flow rate) for SS 304H by using Taguchi based Grey relational analysis. In this research work, pure argon was used as shielding gas. Numbers of trials were performed as per ...  Read More