Transient Melting of a Metal Plate by a Penetrating Plasma Arc

1987 ◽  
Vol 109 (2) ◽  
pp. 463-469 ◽  
Author(s):  
Y. F. Hsu ◽  
B. Rubinsky
Keyword(s):  
Fluid Flow ◽  
Melting Process ◽  
Metal Plate ◽  
Plasma Arc ◽  
First Order ◽  
Plasma Energy ◽  
Method Of Solution ◽  
Metal Processing ◽  
Low Efficiency ◽  
Arc Heating

A study was performed on the heat transfer and the fluid flow during transient melting of a metal plate subjected to stationary, penetrating plasma-arc heating. An integral method of solution was used for this simplified, first-order simulation of plasma-arc metal processing. The results of the study reveal the importance of the workpiece thickness, plasma-penetrating hole size, and gravity on the melting process and the molten fluid flow. The study also shows that plasma-arc metal processing seems to be a low-efficiency manufacturing process with only 7 percent of the plasma energy contributing to the melting.

Testing the Performance of a Traditional Furnace Melting Process on Bronze as the Material of Gamelan

2017 ◽  
Vol 889 ◽  
pp. 99-103
Author(s):  
I. Gusti Ngurah Priambadi ◽  
I. Ketut Gede Sugita
Keyword(s):  
Melting Furnace ◽  
Melting Process ◽  
Data Retrieval ◽  
Musical Instrument ◽  
Smelting Process ◽  
Melting Time ◽  
Time Data ◽  
Average Temperature ◽  
Furnace Melting ◽  
Low Efficiency

Gamelan is traditional musical instrument that evolves especially in Bali, its function is to accompany the religious and cultural ceremonies of Hindus. The making process of gamelan, smelting bronze alloys, is done by using traditional furnaces. The use of charcoal as fuel in smelting process causes melting furnace performance is difficult to determine. That condition impacts the effectiveness of the smelting process especially in determining the needs of fuel and the processing time. Therefore, it influences the productivity of crafters. This research was conducted to test the performance of the furnace in accordance with a design that is commonly used by artisans. The observation was done at the temperature of melting, melting time, data retrieval was conducted repeatedly three times on different days. Based on the analysis and observation in accordance with the experimental design made whereby in the smelting process to achieve the casting temperature indicated as follows. The average temperature of smelting is 730,8 °C, fuel use is 23 kg, melting time is 39.76 minutes as well as the efficiency of the furnace 36.80%. Based on the analysis conducted, low efficiency is due to the surface of the furnace which is designed open, so that during the energy generated in the process of burning a lot of fuel wasted into the environment.

C2 weakens turn over frequency during melting of FexCy: insights from reactive MD simulations

2021 ◽  
Author(s):  
Yubing Liu ◽  
Kuan Lu ◽  
Xingchen Liu ◽  
Jinjia Liu ◽  
Wenping Guo ◽  
...  
Keyword(s):  
Phase Transition ◽  
Order Phase Transition ◽  
Melting Process ◽  
Md Simulations ◽  
First Order ◽  
First Order Phase Transition ◽  
Material Behaviors ◽  
Turn Over Frequency ◽  
Turn Over ◽  
First Order Phase

The first-order phase transition plays a pivotal role in material behaviors, yet that of carbides, a type of important materials, has not been systematically studied. Herein, the melting process and...

Desiliconization of a leucoxene concentrate during plasma–arc heating

2016 ◽  
Vol 2016 (12) ◽  
pp. 1158-1161 ◽  
Author(s):  
A. A. Nikolaev ◽  
D. E. Kirpichev ◽  
A. V. Samokhin ◽  
A. V. Nikolaev
Keyword(s):  
Plasma Arc ◽  
Arc Heating

Analysis of Shells of Revolution Subjected to Symmetrical and Nonsymmetrical Loads

1964 ◽  
Vol 31 (3) ◽  
pp. 467-476 ◽  
Author(s):  
A. Kalnins
Keyword(s):  
Direct Integration ◽  
Shells Of Revolution ◽  
Natural Boundary ◽  
First Order ◽  
Rotationally Symmetric ◽  
Dependent Variables ◽  
Method Of Solution ◽  
Natural Boundary Conditions ◽  
Numerical Method Of Solution ◽  
Theory Of Shells

The boundary-value problem of deformation of a rotationally symmetric shell is stated in terms of a new system of first-order ordinary differential equations which can be derived for any consistent linear bending theory of shells. The dependent variables contained in this system of equations are those quantities which appear in the natural boundary conditions on a rotationally symmetric edge of a shell of revolution. A numerical method of solution which combines the advantages of both the direct integration and the finite-difference approach is developed for the analysis of rotationally symmetric shells. This method eliminates the loss of accuracy encountered in the usual application of the direct integration approach to the analysis of shells. For the purpose of illustration, stresses and displacements of a pressurized torus are calculated and detailed numerical results are presented.

Existence and Multiplicity Results for Systems of First-Order Differential Equations via the Method of Solution-Regions

2018 ◽  
Vol 18 (3) ◽  
pp. 469-485 ◽  
Author(s):  
Marlène Frigon
Keyword(s):  
Differential Equations ◽  
Upper And Lower Solutions ◽  
Multiplicity Results ◽  
First Order ◽  
Existence And Multiplicity ◽  
Method Of Solution ◽  
First Order Differential Equations

AbstractIn this paper, we establish existence and multiplicity results for systems of first-order differential equations. To this end, we introduce the method of solution-regions. It generalizes the method of upper and lower solutions and the method of solution-tubes. Our results can also be seen as viability results since we obtain solutions remaining in suitable regions. We give conditions insuring the existence of at least three viable solutions of a system of first-order differential equations. Many examples are presented to show that a large variety of sets can be solution-regions.

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