scholarly journals Simplified simulation technique of rotating, induction heated, calender rolls for study of temperature field control

Open Physics ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. 326-331
Author(s):  
Jerzy Zgraja
Keyword(s):  
Computer Simulation ◽  
Temperature Field ◽  
Control Systems ◽  
Heating System ◽  
The Other ◽  
Fast Simulation ◽  
Field Control ◽  
The One ◽  
Heated Object ◽  
Induction Heating System

Abstract Predictive computer simulation of the temperature field control system of an induction heated object encounters difficulties associated with the nonlinearityof systemon the one hand, and the time of calculation on the other hand, during numerical analysis of the magnetothermal field of the object, especially in 3D. The paper presents a methodology for the fast simulation of temperature field for a completed induction heating system of calender rolls. The method of 3D calculations of rotating calender rolls with a moving web of wet paper can be connected easily with a simulation of the temperature field controller, for simulation of complex control systems.

Approaches to a Concept of Simulation

2017 ◽  
Author(s):  
Inge Hinterwaldner
Keyword(s):  
Computer Simulation ◽  
Media Studies ◽  
Computer Simulations ◽  
Natural Sciences ◽  
The Other ◽  
Single Spectrum ◽  
Media Philosophy ◽  
Technical Sense ◽  
The One ◽  
Definition Of

It can be shown that the different conceptions of ‘simulation’ (the one of culture critique on the one hand and the denomination of technical applications on the other) that seem to be incompatible with each other can be reconciled on a single spectrum. Its basis in models, its replacement of reality, its lack of reference and of precession of the referent are some pejorative characteristics often emphasized in media philosophy with regard to simulations, for which the sciences applying computer simulations have no use for. It helps crossing over the views that first seem opposite to each other, but that turn out to be compatible if its root in reality is recognized and thus the representational logic is accepted at least according to the intention. The chapter combines ideas of the 'simulacrum' retrieved in the natural sciences with traces of cybernetic thinking in media studies. The whole study builds on a definition of computer simulation in the technical sense as the involvement with and the act of execution f a dynamic mathematic or procedural model that projects, depicts, or recreates a system or process.

Simulation Model of Cascade Control of the Heating System

2015 ◽  
Vol 18 ◽  
pp. 20-27 ◽  
Author(s):  
Mária Tóthová ◽  
Milan Balara ◽  
Ján Dubják
Keyword(s):  
Mathematical Modeling ◽  
Computer Simulation ◽  
Nonlinear Systems ◽  
Simulation Model ◽  
Control Systems ◽  
Heating System ◽  
Cascade Control ◽  
System Model ◽  
Limited Application ◽  
Simulation Results

The automatic heating control systems seem to be the nonlinear systems with thermal inertias and time delay. The controller is also nonlinear because its information and power signals are limited. Application of methods, which are available for nonlinear systems together with computer simulation and mathematical modeling, create possibility to reach serious information about researched system. The paper contains the heating system model with the cascade control, simulation model of this system and some simulation results created in Matlab/Simulink environment.

scholarly journals On the Problem of He–He Bond in the Endohedral Fullerene He2@C60

2018 ◽  
Vol 63 (4) ◽  
pp. 288 ◽  
Author(s):  
G. A. Dolgonos ◽  
E. S. Kryachko ◽  
T. Yu. Nikolaienko
Keyword(s):  
Computer Simulation ◽  
Quantum Theory ◽  
Charge Transfer ◽  
Ground State ◽  
The Other ◽  
Endohedral Fullerene ◽  
Helium Atoms ◽  
Recent Developments ◽  
The One ◽  
Fullerene Stability

For more than twenty years, the endohedral fullerene cavity is attracting a permanent attention of experimenters and theorists, computational chemists and physicists, who apply their efforts to simulate encapsulated atoms and molecules in the fullerene cavity on computers and analyze the arising phenomena of atomic bonding. In this work, recent developments concerning the endohedral fullerene He2@C60, in particular, its experimental observation and relevant computational works, are reviewed. On the one hand, the dihelium He2 embedded into the C60 cavity is observed experimentally. On the other hand, the computer simulation shows that each of the He atoms is characterized by an insignificant charge transfer to C60, so that the He dimer exists as a partially charged (He+b)2 entity. The key issue of the work concerns the existence of a bond between those two helium atoms. Since the bond is created between two particles, we assert that it suffices to define the bond on the basis of the molecular L¨owdin’s postulate and use it to study the He dimer in the C60 cavity in terms of the He–He potential energy well. It was analytically demonstrated that this well can contain at least one bound (ground) state. Therefore, according to L¨owdin’s postulate, which is naturally anticipated in quantum theory, the conclusion is drawn that the (He+b)2 entity is a diatomic molecule, in which two heliums are bound with each other. On the basis of those arguments, the concept of endohedral fullerene stability is proposed to be extended.

Forecasting the Structure and the Hindered Contraction of Casts by Using the ProCAST System of Engineering Analysis

2019 ◽  
Vol 946 ◽  
pp. 661-667
Author(s):  
Ivan Nikolaevich Erdakov ◽  
Vasily A. Ivanov ◽  
Alexander V. Vyboishchik
Keyword(s):  
Computer Simulation ◽  
Linear Expansion ◽  
Experimental Studies ◽  
The Other ◽  
Geometrical Parameters ◽  
Engineering Analysis ◽  
Probability Level ◽  
Alloy Structure ◽  
Simulation Based ◽  
The One

The paper presents the methods for forecasting the structure and geometrical parameters of casts by using the ProCAST system of engineering analysis. Based on experimental studies and computer simulation, a regularity between the supercooling rate of aluminium alloy on the one hand and the nucleation rates and crystal growth rates on the other has been established. There have also been established dependencies describing the change in the plasticity modulus, the coefficient of thermal linear expansion, Poisson's coefficient within the temperature range of 20 to 1000°C for cores made from α-set mixture. The computer simulation based on the experimental data of the processing of silumin casts made it possible to forecast the alloy structure with the probability level of 95%, and to calculate the accuracy of hindered contraction of the alloy with accuracy equal to ± 1.5%.

3D eddy current and temperature field analysis of edge induction heater

2016 ◽  
Vol 35 (2) ◽  
pp. 683-694 ◽  
Author(s):  
Yilun Li ◽  
Shiyou Yang
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Eddy Current ◽  
Three Dimensional ◽  
Heating System ◽  
Temperature Fields ◽  
Rolled Steel ◽  
Content Type ◽  
Induction Heater ◽  
Induction Heating System

Purpose – The temperature drop, especially in the edge of rolled steel in the hot rolling cooling has a catastrophic effect on the steel quality. The purpose of this paper is to study the coupled eddy current-temperature field of a C-type edge induction heater to provide references for engineering applications and designs. Design/methodology/approach – Three-dimensional finite element analysis (FEA) model of a C-type edge induction heater is developed. Especially, a numerical methodology to couple the eddy current and temperature fields is proposed for coupled eddy current and temperature problems involving movement components. FEA software ANSYS is used to solve the coupled eddy current and temperature fields. The heat loss from the eddy current fields is abstracted and processed, and taken as internal heat source in the analysis of the temperature field. The temperature distribution of the rolling steel is obtained. Findings – The numerical results can predict exactly the temperature rise of the rolled steel by means of the edge induction heating system. Practical implications – The proposed numerical methodology for coupling eddy current and temperature fields can be applied to engineering coupled eddy current and temperature problems involving movement components. Also, the developed model and method can be used in the analysis and design of the edge induction heating system. Originality/value – A numerical methodology to couple eddy current and temperature field for solving multi-physics field problems involving movement components is proposed and implemented in available commercial software. A three-dimensional model of the C-type edge induction heat heater is developed. Finite element method is employed to study the coupled eddy current-thermal problem. A method to deal with the movement of the strip steel is proposed. The proposed methodology can be applied to other coupled eddy current-temperature field problem with moving components.

THE USE OF MODERN DRIVER CONTROL SYSTEMS AS PART OF THE TRANSPORT COMPANY MANAGEMENT SYSTEM

2018 ◽  
Vol 110 (1) ◽  
pp. 37-49
Author(s):  
Paweł SOBCZAK ◽  
Jarosław WĄCHAŁA
Keyword(s):  
Control Systems ◽  
Research Problem ◽  
The Other ◽  
Operating Costs ◽  
Cruise Control ◽  
Cost Of Transport ◽  
Transport Services ◽  
The One ◽  
The Cost ◽  
Transport Management

Controlling operating costs and reducing them is one of the most important elements of transport management in today’s highly competitive market. Actions taken by transport companies should be carried out in two ways. On the one hand, the company must strive to obtain new transport orders, on the other hand, it should also take actions aimed at optimising the activities currently being undertaken. The article uses the method of examining documents. The research problem and the purpose of the article was to answer the question whether the use of modern driver control systems can be used not only to improve safety and driving comfort, but also to reduce the cost of transport services. The article compares the costs of transport services on similar routes using modern fleet equipped with two types of cruise control: traditional and adaptive.

User Attitude Toward a Novel Smart Heating System

2016 ◽  
Vol 19 ◽  
pp. 59-64
Author(s):  
Anna Kettschau ◽  
Markus Michl
Keyword(s):  
Room Temperature ◽  
New Technology ◽  
Heating System ◽  
User Acceptance ◽  
The Other ◽  
Energy Saving Potential ◽  
Ambivalent Relationship ◽  
One Year ◽  
The One ◽  
Relationship Of

The paper presents the results of an accompanying socio-scientific research of a one-year field test in a multiple dwelling, in which the energy saving potential of a newly developed smart heating system was examined. To draw conclusions about the user’s acceptance of the smart heating system, the residents of the test object were surveyed in terms of their attitude towards the smart heating system. With regard to user acceptance, we state an ambivalent relationship of the users to the new technology. On the one hand, they are delighted with the system and the increased comfort concerning room temperature. On the other hand, they think that the costs will increase with higher comfort. The analysis shows that adopting a new technology goes along with different, partly competing attitudes.

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