Non-stationary Boundary Conditions in the Thermal Model of Continuous Casting

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F16%3A86099325" target="_blank" >RIV/61989100:27360/16:86099325 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Non-stationary Boundary Conditions in the Thermal Model of Continuous Casting

Original language description

The article focuses on the issue of boundary conditions for simulations of non-steady states in continuous casting machines. Numerical models of the temperature field of the continuously cast strand based on the finite difference method were implemented in off-line and on-line versions. The correctness of the simulation depends on the accuracy of the boundary conditions. Their determination is a technically demanding and costly procedure. From operational data, only approximate boundary conditions can typically be obtained; often average values in time or in space rather than the detailed local and immediate values. Modelling of unsteady behaviour of the casting process is therefore characterized by uncertainty. The boundary condition in the mould can be determined by means of measuring temperatures directly in the mould wall using thermocouples. However, it is demanding to keep the sensors installed permanently in greater numbers. The boundary condition in the secondary cooling area is based on the measurement of heat transfer coefficient by means of the laboratory physical model. Significant complication is caused by non-linearity of heat transfer coefficient in the secondary cooling area due to the Leidenfrost phenomenon. Two reasons of the boundary conditions time variations can be distinguished. The first are deterministic, induced by the operator's changes of casting and cooling parameters, the second are random or quasiperiodic changes, caused by spontaneous fluctuations of parameters and internal quantities

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JG - Metallurgy, metal materials

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

METAL 2016: conference proceedings : (reviewed version) : 25th Anniversary International Conference on Metallurgy and Materials : May 25th-27th 2016, Hotel Voronez I, Brno, Czech Republic, EU

ISBN

978-80-87294-67-3

ISSN

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e-ISSN

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Number of pages

6

Pages from-to

54-59

Publisher name

Tanger

Place of publication

Ostrava

Event location

Brno

Event date

May 25, 2016

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

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