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 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 , August 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 , August 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

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 , August 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

Mostafa Moraveji; Arsalan Parvareh; Roohallah Bakhshi

Volume 19, Issue 2 , August 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