Volume 21 (2024)
Volume 20 (2023)
Volume 19 (2022)
Volume 18 (2021)
Volume 17 (2020)
Volume 16 (2019)
Volume 15 (2018)
Volume 14 (2017)
Volume 13 (2016)
Volume 12 (2015)
Volume 11 (2014)
Volume 10 (2013)
Volume 9 (2012)
Volume 8 (2011)
Volume 7 (2010)
Volume 6 (2009)
Volume 5 (2008)
Volume 4 (2007)
Volume 3 (2006)
Volume 2 (2005)
Volume 1 (2004)
Modeling and Simulation
Improved numerical simulation of the low temperature Fischer-Tropsch synthesis in a trickle bed reactor

H. Salimi; Sh. shahhosseini

Volume 15, Issue 1 , February 2018, , Pages 1-17

Abstract
  Abstract Gas to liquid (GTL) process involves heterogeneous catalytic chemical reactions that convert synthesis gas to hydrocarbons and water vapor. A three phase reactor, called Low temperature Fischer-Tropsch (LTFT) is commonly applied for GTL process. In this reactor the gaseous phase includes the ...  Read More

Modeling and Simulation
Dynamic Behavior of an Oil Droplet Adhered to the Wall Surface in a Channel Flow by the Lattice Boltzmann Method

M. Varmazyar; R. Mohamady; M. Bazargan

Volume 15, Issue 1 , February 2018, , Pages 35-48

Abstract
  The Lattice Boltzmann Method is used to simulate the dynamics of droplet deformation in a channel flow under various conditions. The droplet behavior has been investigated under transient conditions. For cases where the droplet remains attached to the surface, the shape deformation of the droplet during ...  Read More

Modeling and Simulation
Investigation of spent caustic wastewater treatment through response surface methodology and artificial neural network in a photocatalytic reactor

A. Ahmadpour; A. Haghighiasl; N. Fallah

Volume 15, Issue 1 , February 2018, , Pages 46-72

Abstract
  In this research, photocatalytic degradation method has been introduced to clean up Spent Caustic of Olefin units of petrochemical industries (neutralized Spent Caustic by means of sulfuric acid) in the next step, adaptable method and effective parameters in the process performance have been investigated. ...  Read More

Modeling and Simulation
Mathematical simulation of thermal behavior of moving bed reactors

L. Mahmoodi; B. Vaferi; M. Kayani

Volume 14, Issue 4 , December 2017, , Pages 48-58

Abstract
  Temperature distribution is a key function for analyzing and optimizing the thermal behavior of various process equipments. Moving bed reactor (MBR) is one of the high-tech process equipment which tries to improve the process performance and its energy consumption by fluidizing solid particles in a base ...  Read More

Transport Phenomena,
Transient thermal study of recuperative tube in tube heat exchanger operating in refrigeration system using experimental test and mathematical simulation

A. Saberimoghaddam; M. M Bahri Rasht Abadi

Volume 14, Issue 3 , August 2017, , Pages 3-18

Abstract
  Joule-Thomson cooling systems are used in refrigeration and liquefaction processes. There are extensive studies on Joule-Thomson cryogenic systems, but most of them coverage steady state conditions or lack from experimental data. In the present work, transient thermal behavior of Joule-Thomson cooling ...  Read More

Modeling and Simulation
investigation of mercaptan removal from Kerosene using passive mixing tools: Experimental study and CFD modeling

A. Parvareh; . Parvizi

Volume 14, Issue 3 , August 2017, , Pages 55-64

Abstract
  Abstract In this work, the role of appropriate mixing for mercaptan removal from Kerosene using caustic soda has been investigated in the pilot scale. Static mixer at different condition has been used as a passive mixing tool to achieve proper mixing and consequently high performance of mercaptan removal. ...  Read More

Modeling and Simulation
Prediction of polyvinyl alcohol (PVOH) properties synthesized at various conditions by artificial neural networks technique

M.R zeynali; M. Nazari; S. Karimi; S. M. Seyedmohaghegh; S. Soltani

Volume 14, Issue 2 , 2017, , Pages 3-16

Abstract
  In this research samples of PVOH were synthesized at various reaction conditions (temperature, time, and amount of catalyst). First at 25˚C and 45˚C and constant catalyst weight samples of PVOH were prepared with different degree of hydrolysis at various times. For investigation of the effects of temperature, ...  Read More

Modeling and Simulation
A Numerical Simulation Model of Solid Acid Fuel Cell Performance by CsH2PO4 Electrolyte

I. Omidi; M. Kalbasi

Volume 14, Issue 2 , 2017, , Pages 17-32

Abstract
  The performance of the solid acid fuel cell by CsH2PO4 electrolyte was analyzed using the present model of the electrochemical reaction and transport phenomena, which are fully coupled with the governing equations. Development of such a model requires creating the three-dimensional geometry and its mesh ...  Read More

Modeling and Simulation
Observations of Sludge Formation in Group I Base Stock for Lubricants and Thermodynamic Modeling with the SAFT Equation of State

E. Pashai; M. R. Dehghani; F. Feyzi

Volume 14, Issue 2 , 2017, , Pages 33-47

Abstract
  Varnish and sludge formation are considered as one of the most common problems in lubrication and hydraulic systems. In order to simulate the condition of sludge formation, base stock lubricant (Group 1 API) has been selected and exposed to heat in a laboratory setup. Sludge formation process accelerated ...  Read More

Modeling and Simulation
Parasitic Effect of Tube Wall Longitudinal Heat Conduction on Cryogenic Gas Temperature

A. Saberimoghaddam; M. M Bahri Rasht Abadi

Volume 14, Issue 1 , March 2017, , Pages 15-25

Abstract
  Longitudinal heat conduction is an important parameter in the cryogenic field, especially in cryogenic heat exchangers. In the present work, the parasitic effect of tube wall longitudinal heat conduction on temperature measurement has been studied in cryogenic laminar hydrogen flow. The effects of various ...  Read More

Transport Phenomena,
Experimental study of hydrodynamic characteristics of improved sieve tray with push valves

T. Zarei; J. Khorshidi

Volume 14, Issue 1 , March 2017, , Pages 40-51

Abstract
  This paper addresses an experimental investigation in the hydrodynamic behavior of a modified slotted sieve tray. Slotted sieve tray (Push valve sieve tray) is a sieve tray that the push valves have been utilized on the tray deck to eliminate liquid gradients and non-uniformity of liquid distribution ...  Read More

Modeling and Simulation
Liquid-liquid equilibrium data prediction using large margin nearest neighbor

mohsen pirdashti; kamyar movagharnejad; silvia Curteanu; Florin Leon; Farshad Rahimpour

Volume 13, Issue 4 , November 2016, , Pages 14-32

Abstract
  Guanidine hydrochloride has been widely used in the initial recovery steps of active protein from the inclusion bodies in aqueous two-phase system (ATPS). The knowledge of the guanidine hydrochloride effects on the liquid-liquid equilibrium (LLE) phase diagram behavior is still inadequate and no comprehensive ...  Read More

Process Control and Engineering, Process Safety, HSE
Simulation, Control and Experimental Analysis of 1,3Butadiene Purification Unit

Rahbar Rahimi; Shirin Boulaqhi; Amir Ziarifar

Volume 13, Issue 4 , November 2016, , Pages 33-45

Abstract
  Simulation of a process and analysis of its resulting data in both dynamic and steady-state conditions are fundamental steps in understanding the process in order to design and efficient control of system as well as implementing operational cost reduction scheme. In the present paper, steady and unsteady ...  Read More

Transport Phenomena,
Three-dimensional CFD modeling of fluid flow and heat transfer characteristics of Al2O3/water nanofluid in microchannel heat sink with Eulerian-Eulerian approach

Hossein Hadi Najafabadi; Mostafa Keshavarz Moraveji

Volume 13, Issue 4 , November 2016, , Pages 46-61

Abstract
  In this paper, three-dimensional incompressible laminar fluid flow in a rectangular microchannel heat sink (MCHS) using Al2O3/water nanofluid as a cooling fluid is numerically studied. CFD prediction of fluid flow and forced convection heat transfer properties of nanofluid using single-phase and two-phase ...  Read More

Modeling and Simulation
Simultaneous high hydrogen content-synthesis gas production and in-situ CO2 removal via sorption-enhanced reaction process: modeling, sensitivity analysis and multi-objective optimization using NSGA-II algorithm

Malihe Heravi; Mahdi Bayat; Mohammad Reza Rahimpour

Volume 13, Issue 4 , November 2016, , Pages 71-95

Abstract
  The main focus of this study is improvement of the steam-methane reforming (SMR) process by in-situ CO2 removal to produce high hydrogen content synthesis gas. Sorption-enhanced (SE) concept is applied to improve process performance. In the proposed structure, the solid phase CO2 adsorbents and pre-reformed ...  Read More

Modeling and Simulation
Optimization of Hydrogen Distribution Network by Imperialist Competitive AlgorithmIn

M Omidifar; S Shafiei; H Soltani

Volume 13, Issue 3 , July 2016, , Pages 63-77

Abstract
  In modern refineries, hydrogen is widely used for the production of clean fuels. In this paper, a new method is presented in order to use hydrogen more effectively in refineries. This new method is based on combination of linear programming with imperialist competitive algorithm (ICA) in order to optimize ...  Read More

Modeling and Simulation
Prediction of Red Mud Bound-Soda Losses in Bayer Process Using Neural Networks

M. Mahmoudian; A. Ghaemi; H. Hashemabadi

Volume 13, Issue 2 , April 2016, , Pages 46-56

Abstract
  In the Bayer process, the reaction of silica in bauxite with caustic soda causes the loss of great amount of NaOH. In this research, the bound-soda losses in Bayer process solid residue (red mud) are predicted using intelligent techniques. This method, based on the application of regression and artificial ...  Read More

Modeling and Simulation
Prediction of the Effect of Polymer Membrane Composition in a Dry Air Humidification Process via Neural Network Modeling

M. Fakhroleslam; A. Samimi; S.A. Mousavi; R. Rezaei

Volume 13, Issue 1 , January 2016, , Pages 73-83

Abstract
  Utilization of membrane humidifiers is one of the methods commonly used to humidify reactant gases in polymer electrolyte membrane fuel cells (PEMFC). In this study, polymeric porous membranes with different compositions were prepared to be used in a membrane humidifier module and were employed in a ...  Read More

Modeling and Simulation
A three-dimensional mathematical model for drug delivery from drug-eluting stents

P. Darvishi; S. M. Salehi

Volume 12, Issue 4 , October 2015, , Pages 15-27

Abstract
  Current drug-eluting stent (DES) technology is not optimized with regard to the pharmacokinetics of drug release, more research on the drug-eluting stent design and flux of drug release to the arterial wall is necessary. Considering a three-dimensional (3D) cylindrical mathematical model, a novel free ...  Read More

Transport Phenomena,
Experimental Study and Mathematical Modeling of the Osmotic Drying Process

F. Shafiee Langari; K. Movagharnejad*

Volume 12, Issue 3 , July 2015, , Pages 15-32

Abstract
  ne"> The osmotic dehydration of three agricultural products including carrot, zucchini and turnip has been studied in this research. The effect of several factors including temperature, sample to osmotic solution weight ratio and the concentration of the osmotic solutes on the osmotic dehydration ...  Read More

Petroleum and Reservoir Engineering
Investigation of Liquid–Liquid Two-Phase Flow Pattern in Microreactors for Biodiesel Production

M. Basiri; M. Rahimi; F. Mohammadi

Volume 12, Issue 3 , July 2015, , Pages 32-40

Abstract
  "> In the present study, transesterification of soybean oil to Fatty Acid Methyl Ester (FAME) was carried out in the microreactor. The system performance was investigated in the presence of hexane as a cosolvent. Furthermore, the effect of number of micromixer’s inlets on the mixing was one ...  Read More

Modeling and Simulation
Isothermal Reactor Network Synthesis Using Coupled NonDominated Sorting Genetic Algorithm-II (NSGAII) with Quasi Linear Programming (LP) Method

Hadi Soltani; Sirous Shafiei

Volume 12, Issue 3 , July 2015, , Pages 77-95

Abstract
  In this study a new and robust procedure is presented to solve synthesis of isothermal reactor networks (RNs) which considers more than one objective function. This method uses non-dominated sorting genetic algorithm II (NSGAII) to produce structural modification coupled with quasi linear programming ...  Read More

Transport Phenomena,
Experimental and CFD Study of the Tube Configuration Effect on the Shell-Side Thermal Performance in a Shell and Helically Coiled Tube Heat Exchanger

R. Beigzadeh; A. Parvareh; M. Rahimi

Volume 12, Issue 2 , April 2015, , Pages 13-25

Abstract
  "> Despite numerous studies of shell and helically coiled tube heat exchangers, a few investigations on the heat transfer and flow characteristic consider the geometrical effects like coil pitch. Moreover, this scarcity is highlighted for the shell side of this type of heat exchangers. This study ...  Read More

Modeling and Simulation
Simulation of Leaching of Starch from Potato in a Batch Extractor

B. Abbasi Souraki; R. Hasanzadeh

Volume 12, Issue 2 , April 2015, , Pages 26-36

Abstract
  > In this paper, extraction of starch and protein from potato during leaching in a batch extractor, using distilled water as the solvent, was investigated. The experiments were carried out by soaking bulk of infinite slab shape potato samples in distilled water in a temperature and agitation controlled ...  Read More

Modeling and Simulation
CFD Insight of the Flow Dynamics and Velocity Fields in a Gas Turbine Combustor with a Swirl Flame

A. R. Bahramian*

Volume 12, Issue 2 , April 2015, , Pages 37-49

Abstract
  The computational fluid dynamics (CFD) simulations of gas turbine combustor were performed for CH4/air flow with swirl flames. The flow dynamics and velocity fields were numerically studied and the results compared with the experimental data obtained by laser measurements. Two-dimensional (2D) and three-dimensional ...  Read More