Current Issue : October - December Volume : 2020 Issue Number : 4 Articles : 5 Articles
In this study, the Tiwari and Das model is numerically studied, in case of a moving plate containing both single-walled and\nmultiwalled carbon nanotubes (SWCNTs and MWCNTs, respectively), in the presence of thermal radiation and the slip effect.\nEmploying the similarity transformation, a set of 2nd-order partial differential equations (which are used to model the flow and\nheat transfer) are solved numerically using the boundary value problem with 4th-order accuracy (BVP4C) method. The effects of\nrelated parameters, such as the volume fraction of nanoparticles, moving, slip, and radiation parameter on the heat transfer\nperformance are analysed and discussed. Results indicate that a unique solution was placed when the plate travels in assisting flow\nconditions. Additionally, as the nanoparticle volume fraction..................
The polyethylene terephthalate/carbon nanotube (PET/CNT) nanocomposites were prepared by melt mixing using a twin screw\nextruder. CNT content was varied up to 5 wt. %. Morphology as well as dynamic mechanical, calorimetric, and rheological\nproperties of the PET/CNT nanocomposites was investigated. Morphological studies indicated that CNT bundles are regularly\ndistributed within the polymer matrix creating a connected network structure which significantly affects the nanocomposite\nproperties. Dynamic mechanical thermal analysis revealed increase in storage and loss modules of the investigated PET\nnanocomposites by increasing the content of CNTs. Differential scanning calorimetry results demonstrated increase in\ncrystallinity of the investigated PET nanocomposites upon addition of the nanofiller. Rheological studies demonstrated that\nCNT addition up to 5 wt. % caused increment in complex viscosity and storage modulus. Rheological percolation threshold was\nobserved to be 0.83 wt. % of CNT concentration, respectively....
This paper analyzed the locomotion of a snake robot in narrow spaces such as a pipe\nor channel. We developed a unique experimental snake robot with one revolute and one linear\njoint on each module, with the ability to perform planar motion. The designed locomotion pattern\nwas simulated in MATLAB R2015b and subsequently verified by the experimental snake robot.\nThe locomotion of the developed snake robot was also experimentally analyzed on dry and viscous\nsurfaces. The paper further describes the investigation of locomotion stability by three symmetrical\ncurves used to anchor static modules between the walls of the pipe. The stability was experimentally\nanalyzed by digital image correlation using a Q-450 Dantec Dynamics high-speed correlation system.\nThe paper presents some input symmetrical elements of locomotion and describes their influence on\nthe results of locomotion. The results of simulations and experiments show possibilities of snake\nrobot locomotion in a pipe....
Electrospun NiZn ferrite nanofibers have great potential due to their one-dimensional\nstructure and electrical properties, but they have a low reproducibility resulting from many process\nconfounders, so much research effort is needed to achieve optimized process control. For structure\ncontrol, the viscosity of the precursor solution is a likely parameter. One solution is to use polyvinyl\npyrrolidone (PVP) and metal nitrate to obtain the desired viscosity by increasing the nitrate content,\neven if the polymer content is decreased................
In the present work, a simple simulation is advanced based on a Callister equation\nconsidering the impacts of interphase and carbon nanotube (CNT) nets on the strength of\nnanocomposites after percolation onset. The advanced model can analyze the strength of\nnanocomposite by filler aspect ratio.................
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