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)
Research note Modeling and Simulation
Screening of important factors affecting the process of ammonia synthesis by Plackett-Burman method and process optimization with RSM

Amirhossein Oudi; Abdullah Irankhah

Volume 19, Issue 2 , June 2022


  Optimization of the ammonia synthesis unit to increase ammonia production is studied in this line of research. In this paper, the steady-state ammonia synthesis is simulated using Aspen HysysV.11 software, by comparing the simulation results with industrial information, a mean relative error of 7.71% ...  Read More

Regular Article Separation Technology,
Fabrication and characterization of polysulfone-graphene oxide mixed matrix membranes for natural gas treatment

Roohallah Bakhshi; Mostafa Moraveji; Arsalan Parvareh

Volume 19, Issue 2 , June 2022


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

Regular Article Energy
Investigation of air injection impact on the thermal performance of helical tube with varying helix diameter: Downward Flow

Mohammad Moaf; Omid Alizadeh; Alireza pendashteh

Volume 19, Issue 2 , June 2022


  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 constant heat flux. The flow had a downward form and the air was injected into the ...  Read More

Regular Article Transport Phenomena,
Effect of isopropanol on fluidization of hydrophilic titanium nano-powder

Hamed Hoorijani; Reza Zarghami; Navid Mostoufi

Volume 19, Issue 2 , June 2022


  The effect of adding isopropanol (ISP) to nitrogen as the fluidizing gas on the hydrodynamics of 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 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

alireza bahramian

Volume 19, Issue 2 , June 2022


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

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

Reyhane Ahmadi; Hamidreza Sanaeepur; abtin Ebadi Amooghin

Volume 19, Issue 2 , June 2022


  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 high thermal stability, mechanical strength, and chemical resistance. In ...  Read More