Publication detail

Importance of Thermophysical Properties on Calculation Accuracy of Thermokinetics of Solidification

KAVIČKA, F. ŠTĚTINA, J. SEKANINA, B.

Original Title

Importance of Thermophysical Properties on Calculation Accuracy of Thermokinetics of Solidification

Type

journal article - other

Language

English

Original Abstract

The thermophysical properties of steels have significant influence on the actual continuous and also gravitational casting process, and on the accuracy of its numerical simulation and optimization. The determination of these properties (heat conductivity, specific heat capacity and density in the solid and liquid states) often requires more time than the actual numerical calculation of the temperature fields of a casting. The influence of individual properties should be neither under- nor over-estimated. Therefore, an analysis/parametric study of these thermophysical properties was conducted. The order of importance within the actual process and the accuracy of simulation and optimization were also determined. Individual properties, which, in some cases, were obtained from tables, and in others experimentally, were substituted by an approximation using orthogonal polynomials. The accuracy of each polynomial is dependent on the precision of individual values. The order of significance of individual thermophysical properties was determined with respect to the metallurgical length for concasting process and with respect to the total solidification time for gravitational casting process. The analysis was performed by means of a so-called calculation experiment, i.e., by means of the original and universal numerical casting model developed by the authors of this paper. It is convenient to conduct such an analysis in order to facilitate the simulation of each individual case of casting, thus enhancing the process of optimization.

Keywords

Steel solidification, thermokinetics, thermophysical properties, calculation accuracy.

Authors

KAVIČKA, F.; ŠTĚTINA, J.; SEKANINA, B.

RIV year

2011

Released

10. 12. 2011

Publisher

David Publishing

ISBN

1934-8959

Periodical

Journal of Materials Science and Engineering A

Year of study

A1, 2011

Number

12

State

United States of America

Pages from

1037

Pages to

1044

Pages count

8

BibTex

@article{BUT89878,
  author="František {Kavička} and Josef {Štětina} and Bohumil {Sekanina}",
  title="Importance of Thermophysical Properties on Calculation Accuracy of Thermokinetics of Solidification",
  journal="Journal of Materials Science and Engineering A",
  year="2011",
  volume="A1, 2011",
  number="12",
  pages="1037--1044",
  issn="1934-8959"
}