Further, it is shown that this error is rectified either by changing the method of solving discretized equation or by coarsening the mesh. We show that the model can be analytically treated in part to establish a particular feature in the simulated concentration profiles is a numerical artefact. Our study focuses upon simulated effect of these conditions on concentration profiles from the point of view of numerical error. Three types of hydrodynamic boundary conditions representing surface engineered device walls (hydro-active patches) were investigated as design test cases. The simulations were performed using OpenFOAM (Open-source Field Operation And Manipulation), a finite volume based open source software. In the present work, an unsteady flow model with decay constant was utilized for testing passive micro-mixer simulations for numerical error. 3178-3185, 2008.Īdvection dominant fluid flows and transport processes in microfluidic mixing devices pose noteworthy challenges in design related simulations as regards numerical errors. Saha, “ Antibacterial Poly(vinyl Alcohol) Film Containing Silver Nanoparticles: Preparation and Characterization”, J. Shinde, “Synthesis and characterisation of polymeric composites embedded with silver nanoparticles”, Worl. Dorranian, “Effect of Ag-Nanoparticles Doped in Polyvinyl Alcohol on the Structural and Optical Properties of PVA Films”, J. Ramu, “Structural, Optical and Electrical conductivity Studies of Mn2+ Ions Doped PVA/MAA: EA Polymer Blend Films” International Journal of Scientific Research in Physics and Applied Sciences, Vol. Djokovic, Luyt, “Fabrication and Characterisation of Silver-PolyvinylAlcohol Nanocomposites”, Chem. Friedman, “Particle Size Determination from X-Ray Line Broadening”, J. Liu, “Comparison of bactericidal activities of Ag-NPs with common chemical disinfectants”, Colloids Surf. Afify, “Optical, Structural and Catalytic Evaluation of Gamma-Irradiation Synthesized Ag/PVA Nanocomposite Films”, International Journal of Engineering Research & Technology, Vol. Afify, “Synthesis, Characterization and Antibacterial Activity of Ag/PVA Nanocomposite”, J. Kim, “A mechanistic study of the antibacterial effect of silver ions on Escherichia coli and Staphylococcus aureus”, J. Shyam, “γ-Irradiated PVA/Ag nanocomposite films: Materials for optical applications”, J. “Silver-only” aqueous suspensions via hydrogen reduction”, J. Chumanov, “Size-controlled synthesis of nanoparticles. Abou Zeid, “Gamma-irradiation assisted seeded growth of Ag nanoparticles within PVA matrix”, Mater. Li, “Synthesis and assembly of monodisperse spherical Cu2S nanocrystals”, J. Tamulevičius, “Plasmonic properties of silver in polymer”, Mater. Mar-elnabi, E.A.A Balla, Kh.M Dahlan, Y.M Yousif, “Gamma Radiation Synthesis and Characterization of Polyvinyl Alcohol/ Silver Nano Composites Film”, J.Sc. Ram, “Microstructure, topology and X-ray diffraction in Ag-metal reinforced polymer of polyvinyl alcohol of thin laminates”, J. Fischer, “Polymer nanocomposites: from fundamental research to specifi applications,” Mater. Sabharwal “Effect of Gamma Irradiation on Structure and Morphology of PVA Films”, Nucl. Darwish, “Silver- Polymer Blend Nanocomposite”, New York Science Journal, Vol.7, Issue 1, pp.84-94, 2014. Poly (vinyl alcohol)/Silver Nanocomposites, Gamma Radiation, Characterization, Antibacterial property This study reveals that the irradiated PVA/Ag nanocomposites film shows good antibacterial activity against the Gram-positive and Gram-negative bacteria. The samples were tested against Gram-positive bacteria: Bacillus Subtilis, Staphylococcus aureus, and Gram-negative bacteria: Escherichia coli, Klebsiella pneumoniae. The antibacterial activities of the PVA/Ag nanocomposites were obtained using the zone inhibition method. Transmission Electron Microscopy (TEM) shows the particles were nano size and monodispersed. The presence of Ag was confirmed using Energy Dispersive X-ray Spectroscopy (EDX) elemental analysis. The morphology of particles was studied using Field Emission Scanning Electron Microscopy (FESEM) it shows the nanoparticles are in spherical shape. X-ray diffraction analysis shows that Ag metal is present in face-centered cubic (fcc) crystal structure. FTIR analysis shows the formation of chemical bonding/conjugation between the Ag nanoparticles and PVA chains. Ultraviolet-Visible spectroscopy, the characteristic Surface Plasmon Resonance (SPR) band placed at around 427 nm. In this work, a unique nanocomposite film based on poly (vinyl alcohol)/silver (PVA/Ag) has been synthesized using solution casting technique and the samples were exposed to gamma radiation for different doses 0, 25, 50 and 75 kGy.
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