Turbulent Coagulation of Solid Particles in Molten Aluminium-Kinetics of Cluster Formation

2012 ◽  
pp. 1337-1342
Author(s):  
Tao Li ◽  
Shin-ichi Shimasaki ◽  
Shoji Taniguchi ◽  
Kentaro Uesugi
Keyword(s):  
Cluster Formation ◽  
Solid Particles ◽  
Molten Aluminium ◽  
Kinetics Of

Turbulent Coagulation of Solid Particles in Molten Aluminium—Kinetics of Cluster Formation

2012 ◽  
pp. 1337-1342 ◽  
Author(s):  
Tao Li ◽  
Shin-ichi Shimasaki ◽  
Shoji Taniguchi ◽  
Kentaro Uesugi
Keyword(s):  
Cluster Formation ◽  
Solid Particles ◽  
Molten Aluminium ◽  
Kinetics Of

scholarly journals Kinetics of Insulin Aggregation: Disentanglement of Amyloid Fibrillation from Large-Size Cluster Formation

2006 ◽  
Vol 90 (12) ◽  
pp. 4585-4591 ◽  
Author(s):  
Mauro Manno ◽  
Emanuela Fabiola Craparo ◽  
Vincenzo Martorana ◽  
Donatella Bulone ◽  
Pier Luigi San Biagio
Keyword(s):  
Cluster Formation ◽  
Large Size ◽  
Amyloid Fibrillation ◽  
Kinetics Of

scholarly journals Dynamic Cure Kinetics and Physical-Mechanical Properties of PEG/Nanosilica/Epoxy Composites

2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Haleh Nowruzi Varzeghani ◽  
Iraj Amiri Amraei ◽  
Seyed Rasoul Mousavi
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Cure Kinetics ◽  
Diglycidyl Ether ◽  
Solid Particles ◽  
Scanning Calorimetry ◽  
Cure Reaction ◽  
Cure Kinetic ◽  
Cure Temperature ◽  
Kinetics Of

This study investigated the effect of polyethylene glycol (PEG) and nanosilica (NS) on the physical-mechanical properties and cure kinetics of diglycidyl ether of bisphenol-A-based epoxy (DGEBA-based EP) resin. For this purpose, tensile and viscometry tests, dynamic mechanical thermal analysis (DMTA), and differential scanning calorimetry (DSC) were carried out under dynamic conditions. The results showed that adding NS and PEG enhances the maximum cure temperature as well as the heat of cure reaction (ΔH) in EP-NS, while it decreases in EP-PEG and EP-PEG-NS. The cure kinetic parameters of EP-PEG-NS were calculated by Kissinger, Ozawa, and KSA methods and compared with each other. The Ea calculated from the Kissinger method (96.82 kJ/mol) was found to be lower than that of the Ozawa method (98.69 kJ/mol). Also, according to the KAS method, the apparent Ea was approximately constant within the 10-90% conversion range. Tensile strength and modulus increased by adding NS, while tensile strength diminished slightly by adding PEG to EP-NS. The glass transition temperature (Tg) was calculated using DMTA which was increased and decreased by the addition of NS and PEG, respectively. The results of the viscometry test showed that the viscosity increased with the presence of both PEG and NS and it prevented the deposition of solid particles.

Experimental and Theoretical Study on Melting Kinetics of Spherical Aluminum Particles in Liquid Aluminum

2015 ◽  
Vol 1765 ◽  
pp. 139-144
Author(s):  
Marco Ramírez-Argáez ◽  
Enrique Jardón ◽  
Carlos González-Rivera
Keyword(s):  
Heat Transfer ◽  
Mathematical Model ◽  
Heat Transfer Coefficient ◽  
Process Analysis ◽  
Convective Heat Transfer Coefficient ◽  
Melting Process ◽  
Solid Particles ◽  
Melting Time ◽  
Melting Kinetics ◽  
Kinetics Of

ABSTRACTIn this study a process analysis of the melting process of solid particles in a bath of same composition is performed using both experimental information and theoretical computations. An experimental setup was used to measure the thermal histories and to follow the evolution with time of the size of solid metallic spherical particles being melted in a metallic bath of same composition. For such a purpose, pure aluminum was used during the experiments for both solid particles and liquid bath. A mathematical model was also developed based on first principles of heat transfer to simulate the melting kinetics of a cold metallic spherical particle immersed in a hot liquid bath of same composition. The mathematical model was reasonably validated when compared against the experimental results obtained in this work. A process analysis of the melting process was performed to determine the effect of the initial temperature and size of the solid particle, the bath temperature and the convective heat transfer coefficient on the melting time and on the energy consumption.The analysis showed that the variable presenting the most significant effect on both the melting time and the energy consumption is the convective heat transfer coefficient between the particle and the bath, since an increment in such a parameter accelerates the melting process and saves energy. Therefore, proper stirring of the bath is highly recommended to enhance the melting of metallic alloying additions in the metallic baths.

Nanoparticles aggregation in nanofluid flow through nanochannels: Insights from molecular dynamic study

2014 ◽  
Vol 25 (11) ◽  
pp. 1450066 ◽  
Author(s):  
Habib Aminfar ◽  
Mohammad Ali Jafarizadeh ◽  
Nayyer Razmara
Keyword(s):  
Poiseuille Flow ◽  
Pt Nanoparticles ◽  
Potential Interaction ◽  
Solid Particles ◽  
Dynamics Simulation ◽  
Intermolecular Potential ◽  
Cluster Morphology ◽  
Flow Through ◽  
Solid Walls ◽  
Kinetics Of

This paper deals with the molecular dynamics simulation (MDS) of nanofluid under Poiseuille flow in a model nanochannel. The nanofluid is created by exerting four solid nanoparticles dispersed in Argon ( Ar ), as base fluid, between two parallel solid walls. The flow is simulated by molecules with the Lennard-Jones (LJ) intermolecular potential function. Different simulations are done with two different types of solid particles and two cut-off radii. In each case, Copper ( Cu ) and Platinum ( Pt ) LJ parameters are applied for the nanoparticles and solid walls particles with cut-off ratios of 2.2σ and 2.5σ. The microstructure of the system at different time steps is investigated to describe the aggregation kinetics of nanofluid on Poiseuille flow. When a few nanoparticles or a cluster of them reach each other, they stick together and the interaction surface of the solid–fluid interface reduces, so the potential energy of the system decreases at these time steps. Therefore, the system enthalpy reduces at the aggregation time steps. Results show that the simulations with cut-off radius 2.5σ indicate minimum clustering effect at the same time. Based on the obtained results, the system with Cu nanoparticles makes it to aggregate later than that of Pt nanoparticles which is due to differences in potential interaction of two materials. The new simulation results enhance our understanding of cluster morphology and aggregation mechanisms.

scholarly journals Kinetics of the σ Phase Precipitation in Respect of Erosion-corrosion Wear of Duplex Cast Steel

2014 ◽  
Vol 14 (1) ◽  
pp. 17-20 ◽  
Author(s):  
A. Brodziak-Hyska ◽  
Z. Stradomski ◽  
C. Kolan
Keyword(s):  
Flue Gas ◽  
Cast Steel ◽  
Strengthening Mechanism ◽  
Operating Conditions ◽  
Solid Particles ◽  
Corrosion Wear ◽  
Phase Precipitation ◽  
Σ Phase ◽  
Erosion Corrosion ◽  
Kinetics Of

Abstract The examined material comprised two grades of corrosion-resistant cast steel, namely GX2CrNiMoN25-6-3 and GX2CrNiMoCuN25-6-3- 3, used for example in elements of systems of wet flue gas desulphurisation in power industry. The operating conditions in media heated up to 70°C and containing Cl' and SO4 ions and solid particles produce high erosive and corrosive wear.The work proposes an application of the σ phase as a component of precipitation strengthening mechanism in order to increase the functional properties of the material. The paper presents the results of examination of the kinetics of σ phase precipitation at a temperature of 800°C and at times ranging from 30 to 180 minutes. Changes in the morphology of precipitates of the σ phase were determined using the value of shape factor R. Resistance to erosion-corrosion wear of duplex cast steel was correlated with the kinetics of sigma phase precipitating.

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