Volume 21 (2024)
Volume 20 (2023)
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)
Regular Article Modeling and Simulation
Screening of important factors affecting the process of ammonia synthesis by Plackett-Burman method and process optimization with RSMScreening the Important Factors Affecting the Process of Ammonia Synthesized by the Plackett-Burman Method and the Process Optimization with RSM

A. H. Oudi; A. Irankhah

Volume 19, Issue 2 , June 2022, Pages 3-20


  The optimization of the ammonia synthesis plant to increase the production of ammonia is studied in this line of research. In this paper, the steady-state ammonia synthesis is simulated using the Aspen HysysV.11 software. By comparing the simulation results with the industrial information, a mean relative ...  Read More

Regular Article Separation Technology,
Fabrication and Characterization of Polysulfone-Graphene Oxide Mixed Matrix Membranes for the Natural Gas Treatment

R. Bakhshi; M. Moraveji; A. Parvareh

Volume 19, Issue 2 , June 2022, Pages 21-37


  The polysulfone mixed matrix membranes (MMM) with different concentrations of graphene oxide (0, 0.25, 0.5 wt % of the polymer) are fabricated by a phase separation method. The cross-sectional structures and their upper surface were assessed by the (SEM) surface roughness of the membranes assessed by ...  Read More

Full article Energy
Investigating the Impact of Air Injection on the Thermal Performance of Helical Tube with Varying Helix Diameters: Downward Flow

M. Moaf; O. Alizadeh; A. R. pendashteh

Volume 19, Issue 2 , June 2022, Pages 38-50


  In this experimental investigation, the heat transfer and pressure drop of helical tubes with various helical diameters have been studied considering air injections. The tube was rested in vertical form and was put under the constant heat flux. The flow had a downward form and the air was injected into ...  Read More

Regular Article Transport Phenomena,
Effect of Isopropanol on the Fluidization of Hydrophilic Titanium Nano-Powder

H. Hoorijani; R. Zarghami; N. Mostoufi

Volume 19, Issue 2 , June 2022, Pages 51-67


  The effect of adding isopropanol (ISP) to nitrogen as the fluidizing gas on the hydrodynamics of the fluidization of hydrophilic titanium nanoparticles was studied. It was shown by the pressure drop method that adding ISP reduces the minimum fluidization velocity. Wavelet transform of the pressure fluctuations ...  Read More

Regular Article Environmental Engineering,
Theoretical Prediction of the Size and Lifetime of Evaporating Sneeze Droplets in a Confined Space: A Guideline to Control of COVID-19 Virus Transmission

A. L. Bahramian

Volume 19, Issue 2 , June 2022, Pages 68-88


  The size and lifetime of evaporating sneeze droplets in the indoor environment were studied experimentally and theoretically. The effects of indoor temperature T∞ and indoor humidity RH∞ on evaporating droplets with the initial diameters of 4.9, 8.1, 17.2, and 29.7 μm were investigated. ...  Read More

Regular Article Materials synthesize and production
The Effect of the Methyl Functional Group on the Physicochemical and Structural Properties of a Synthesized Semi-Aromatic Polyimides

R. Ahmadi; H. Sanaeepur; A. Ebadi Amooghin

Volume 19, Issue 2 , June 2022, Pages 89-99


  It is crucial to design and develop new polymers with desirable characteristics. Aromatic polyimides have been attracted more attention in comparison with other polymeric materials, because of their excellent properties, such as the high thermal stability, mechanical strength, and chemical resistance. ...  Read More