Detail publikace

Importance of Thermophysical Properties on Calculation Accuracy of Thermokinetics of Solidification

KAVIČKA, F. ŠTĚTINA, J. SEKANINA, B.

Originální název

Importance of Thermophysical Properties on Calculation Accuracy of Thermokinetics of Solidification

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

Steel solidification, thermokinetics, thermophysical properties, calculation accuracy.

Autoři

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

Rok RIV

2011

Vydáno

10. 12. 2011

Nakladatel

David Publishing

ISSN

1934-8959

Periodikum

Journal of Materials Science and Engineering A

Ročník

A1, 2011

Číslo

12

Stát

Spojené státy americké

Strany od

1037

Strany do

1044

Strany počet

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"
}