Thermophysical properties of glyceline–water mixtures investigated by molecular modelling

2019 ◽  
Vol 21 (12) ◽  
pp. 6467-6476 ◽  
Author(s):  
Jörg Baz ◽  
Christoph Held ◽  
Jürgen Pleiss ◽  
Niels Hansen
Keyword(s):  
Water Activity ◽  
Process Parameters ◽  
Shear Viscosity ◽  
Molecular Modelling ◽  
Thermophysical Properties ◽  
Important Process

Water activity and shear viscosity of water–glyceline mixtures are important process parameters that can be effectively calculated using molecular modelling.

Factors influencing the formation of hollow ceramic microspheres by water extraction of colloidal droplets

1995 ◽  
Vol 10 (1) ◽  
pp. 84-94 ◽  
Author(s):  
Jay G. Liu ◽  
David L. Wilcox
Keyword(s):  
Process Parameters ◽  
Sol Gel ◽  
Hollow Microspheres ◽  
Extraction Rate ◽  
Water Extraction ◽  
Important Process ◽  
Initial Droplet ◽  
Factors Influencing ◽  
Initial Droplet Size ◽  
Good Agreement

Hollow ceramic microspheres of Al2O3, SiO2, and mullite have been prepared by the combination of an emulsion technique with a water extraction sol-gel method. Concentration of sol, initial droplet size, and water extraction rate of the system are found to be the important process parameters controlling the size and wall thickness of the hollow microspheres, and their influences are shown. A model that correlates the morphology of microspheres to concentration and water extraction rate is proposed and is in good agreement with the experimental observations. The capability and limitation of this process for forming hollow microspheres are demonstrated. It was shown that hollow microspheres with sizes greater than 5 μm could be readily prepared, while a limitation was met for sizes less than 1 μm, in which case solid microspheres were normally formed.

Corner Reproduction Accuracy in Electro-Chemical Drilling (ECD) of Blind Holes

1984 ◽  
Vol 106 (1) ◽  
pp. 55-61 ◽  
Author(s):  
V. K. Jain ◽  
Vinod Kumar Jain ◽  
P. C. Pandey
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Regression Analysis ◽  
Dimensional Analysis ◽  
Analysis Of Variance ◽  
Process Parameters ◽  
Important Process ◽  
Electrochemical Drilling ◽  
Experimental Findings ◽  
Shape And Size

Little information is available about the corner shape and size produced in electrochemical drilling of blind holes. On this account prediction of the complete anode shape analytically, in ECD, is not possible. This paper reports the experimental findings regarding the shape and size of the corners copied, in the anode during electrochemical drilling of blind holes using a tool of specified geometry. An equation evolved by regression analysis of experimental data has been suggested for this purpose. With a view to improve results, an equation based on dimensional analysis has also been presented. Finally, a comprehensive mathematical model accounting for the independent, higher order, and the interaction effects of different important process parameters on the yield (anode radius) has been proposed and its adequacy has been tested by the analysis of variance and accuracy against experimental data.

scholarly journals Optimization Model of Process Parameters for Full-Plate Long-Roll Straightening considering Equipment Bounce

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Xiaoyu Zhu ◽  
Peisheng Han ◽  
Xiaoxiao Liu ◽  
XiaoGang Wang
Keyword(s):  
Process Parameters ◽  
Optimization Model ◽  
Dynamic Change ◽  
Iterative Solution ◽  
Tail Flick ◽  
Important Process ◽  
C Language ◽  
Plate Length ◽  
Curvature Integral ◽  
Application Requirements

Roll straightening is an important process link in sheet production. Due to the step change of the straightening force during the straightening bite and the tail flick, the whole-plate length straightening and pressing process changes will affect the straightening effect. Based on the solution of the curvature integral straightening process, this paper introduces the stiffness coefficient of the straightening equipment. Through C language programming, the iterative solution has been realized, and the process parameters of the dynamic change of the straightening reduction have been obtained. The enumeration method was used to establish a calculation method to optimize the entire board-length straightening process. The laboratory comparison of the 11-roll straightening machine proves that the straightening process optimization model meets the application requirements.

Trockenscherschneiden von Verbundblechen*/Lubricant free shear cutting of polymer-metal composites - Important process parameters on the cutting surface geometries

2015 ◽  
Vol 105 (10) ◽  
pp. 733-737
Author(s):  
P. Groche ◽  
P. Stein ◽  
D. Übelacker ◽  
F. Neumayer ◽  
F. Steinbach
Keyword(s):  
Process Parameters ◽  
Sound Insulation ◽  
Manufacturing Processes ◽  
Important Process ◽  
Sheet Metals ◽  
Metal Composites ◽  
Cutting Surface ◽  
Polymer Metal ◽  
Application Potential ◽  
High Application

Verbundbleche, bestehend aus Metall- und Polymerschichten, haben ein hohes Anwendungspotential. Je nach Schichtaufbau liegen die Vorteile im Bereich des Korrosionsschutzes, des Leichtbaus sowie der Geräuschdämmung. Um das Potential dieser Materialien zu nutzen, müssen die Parameter konventioneller Fertigungsverfahren angepasst werden. Der Fachbeitrag beschreibt den Einfluss wichtiger Parameter auf die Schnittgüte beim Scherschneiden.   Composite sheets, consisting of sheet metals and polymer layers, have high application potential. Depending on the used layers they can be used as corrosion protection, lightweight or sound insulation materials. To exploit the advantages of these materials the parameters of conventional manufacturing processes have to be adapted. In this publication the influence of important parameters on the shear cutting quality is explained.

Electrolytic Polishing Solutions

1984 ◽  
pp. 562-609
Keyword(s):  
Process Parameters ◽  
Current Density ◽  
Tabular Form ◽  
Important Process ◽  
Electrolytic Polishing

Abstract This appendix provides detailed information on the processes and procedures used in electrolytic polishing. It lists important process parameters, including time, temperature, voltage, and current density, as well as the recipes of electrolytic solutions used. The information is presented in tabular form, corresponding to specific metals and their alloys.

Impacts of Process Parameters on the Substrate Distortion of PAW-Based Rapid Prototyping

2011 ◽  
Vol 462-463 ◽  
pp. 1002-1007
Author(s):  
Wurikaixi Aiyiti ◽  
Mamtimin Gheni ◽  
Xieeryazidan Adayi
Keyword(s):  
Process Parameters ◽  
Arc Welding ◽  
Pulse Current ◽  
Low Cost ◽  
Plasma Arc Welding ◽  
Important Process ◽  
Element Analysis ◽  
Rp Process ◽  
Feeding Speed ◽  
Wire Feeding

A low-cost direct metal RP process based on the plasma arc welding (PAW) is presented. The impacts of two important process parameters (pulse current and wire-feeding speed) on the distortion of the substrate are investigated. The temperature field and the distortion of the depositing process are simulated by finite element analysis. The results show that the heat input and the quantity of the metal fed into the molten pool influence the distortion of the substrate. Higher pulse current and wire-feeding speed will bring on larger distortion.

Numerical Study of the Thermosolutal Convection Induced Macrosegregation during Columnar Solidification

2010 ◽  
Vol 154-155 ◽  
pp. 1415-1418
Author(s):  
Jing Hao ◽  
Meng Huai Wu ◽  
Andreas Ludwig ◽  
Monika Grasser
Keyword(s):  
Numerical Model ◽  
Process Parameters ◽  
Thermophysical Properties ◽  
Numerical Study ◽  
Sensitivity Study ◽  
Thermosolutal Convection ◽  
Two Phase ◽  
Numerical Problem ◽  
Solidification Model ◽  
Comparison With Experiments

As a response to “call for contribution to a numerical problem for 2D columnar solidification of binary alloys” [Bellet et al., Int. J. Therm. Sci., Vol. 48(11)(2009), p. 2013], the macrosegregation in a Pb-18wt.%Sn benchmark casting is numerically studied with a two-phase columnar solidification model developed by the current authors. The studies were done with 2D calculations in response to the call, and a 3D calculation was performed to confirm the consistency with the 2D case. A grid-sensitivity study was done to ensure the reliability and accuracy of the present results. The segregation mechanism due to thermosolutal convection was analyzed and the uncertainties resulting from the inaccurate thermophysical properties, modelling and process parameters are discussed. The numerical model was evaluated by comparison with experiments.

Influence of Alloying Elements and Processing in AA 8006-Alloys on Microstructure and Properties of Rolled Products

2014 ◽  
Vol 794-796 ◽  
pp. 1147-1151
Author(s):  
Jochen Hasenclever
Keyword(s):  
Thermal Stability ◽  
Process Parameters ◽  
Casting Process ◽  
Alloying Elements ◽  
Important Process ◽  
Intermediate Annealing ◽  
Alloying Element ◽  
Final Thickness ◽  
Microstructure And Properties ◽  
Dc Casting

The effect of Manganese as alloying element and important process parameters on the microstructure of AA 8006-alloys was investigated in this work. Furthermore the effect of different casting processes (CC-casting versus DC-casting) was studied. The addition of higher Mn-contents results in higher strength values and a better thermal stability. The recovery and recrystallisation behaviour is also influenced by the processing. Important process steps are the preheating and the intermediate annealing. The properties at final thickness are also related to the applied casting process ( DC versus CC).

scholarly journals Thermophysical properties and water activity of transferred cheese (UF)

2015 ◽  
Vol 04 (06) ◽  
pp. 550-553 ◽  
Author(s):  
Mohsen Dalvi Esfahan ◽  
Yasamin Jahangiri ◽  
Mehdi Kaviani ◽  
Lukáš Hleba ◽  
Mohammad Ali Shariati
Keyword(s):  
Water Activity ◽  
Thermophysical Properties
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