List of Articles particle shape

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  1 - The effect of particle shape of porous media on the longitudinal dispersivity: contaminant transport
  ghasem mirzaei
  One of the most challenging quantities in analyzing the transfer of contaminant in the porous medium is the determination of longitudinal dispersivity. In this research, the effects of the porous media particle shape on the longitudinal dispersivity were investigated by More

  One of the most challenging quantities in analyzing the transfer of contaminant in the porous medium is the determination of longitudinal dispersivity. In this research, the effects of the porous media particle shape on the longitudinal dispersivity were investigated by experiments on three column of soil (broken texture, river sand, spherical texture). Flow and contaminant (NaCl) were injected at five levels of velocities and the Breakthrough curve was extracted at five points along the column by Self-Potential Method, Then, by simulating the results with FEFLOW software and the inverse analysis with CXTFIT2 software, longitudinal dispersivity was determined. The results indicate that, for constant velocity, the medium with spherical texture has a longitudinal dispersivity greater than the other two medium and in the sandy medium it is more than the broken texture. This can be due to the increase in the contact surface as well as the path’s tortuosity, with the particle coming out of the spherical shape. With increasing velocity, the longitudinal dispersivity decreases in all three medium. Also, as the particles are closer to the spherical shape, the scale effect will be greater, and with increasing velocity, the decrease in the longitudinal dispersivity in these medium will be less. Manuscript profile
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  2 - Analysis of loess sediment texture in Golestan province according to the microstructure parameters
  Somayeh Ghandhari Arash Amini Ali Solgi Hamed Rezaei
  10.30495/ijes.2019.669399
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  3 - Increased Light Absorption in CIGS Solar Cells with Plasmonic Ag Nanostructures to Increase Efficiency
  Seyed Mohammad Sadegh Hsheminassab Mohsen Imanieh Abbas Kamali Seyyed ali Emamghorashi Saeed Hassanhasseini
  Recently, environmental problems on a global scale has been increased seriously. To overcome these problems, Solar cells is important as an energy source and free from contamination. Due to the increasing use of renewables, the use of solar cells for obtaining energy is More

  Recently, environmental problems on a global scale has been increased seriously. To overcome these problems, Solar cells is important as an energy source and free from contamination. Due to the increasing use of renewables, the use of solar cells for obtaining energy is growing. The cells convert directly sunlight into electricity by the photovoltaic. Photovoltaic energy research and development is generally done in two areas: cost reduction and increasing efficiency. The efficiency of thin film solar cells canbe increased considerably by coupling the solarcells with plasmonic nanoparticles (NPs). this study investigates, through meticuloussimulations, the effects of plasmonic nanoparticle shapes and size on theimprovement of the energy conversion efficiency of CIGS solar cells. Two different shapes including spheres and cylinders were analyzed in this study.It was revealed that the cylindrical Agnanoparticles, of diameter 50 nm, height 125 nm place on an array with period 215 nm exhibited the most substantialenhancement in the optical absorption and electrical currentgeneration. The conclusion attained in this paper has been made throughoptical and electricalanalysis as well as near field imaging studies. Manuscript profile