Problems of Heat Source Modeling in Iso–Exothermic Materials Used as Riser Sleeves in Foundry

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The modeling of heat transfer in materials containing exothermic components must take into consideration the presence of heat sources in the Fourier–Kirchhoff equation. The aim of this investigation was the identification of real and effective thermophysical parameters of the insulating–exothermic materials used as riser sleeves containing these exothermic heat sources. The experiments of steel pouring into the mould, containing different insulating and exothermic sleeves were carried out, using thermocouples measurement systems (thermal analysis of casting–mould system). Then the thermophysical coefficients of these materials were calculated using inverse problem solution. The worked time–dependent formula of exothermic reaction heat (heating yield in W/m3) was called heat source function. The paper presents the basis and the practical expression of heat source by different functions, its justification and the results of simulations using these functions. The numerical system Calcosoft and its Inverse Solution procedure were applied.

Info:

Periodical:

Materials Science Forum (Volumes 514-516)

Edited by:

Paula Maria Vilarinho

Pages:

1438-1442

DOI:

10.4028/www.scientific.net/MSF.514-516.1438

Citation:

Z. Ignaszak and P. Popielarski, "Problems of Heat Source Modeling in Iso–Exothermic Materials Used as Riser Sleeves in Foundry", Materials Science Forum, Vols. 514-516, pp. 1438-1442, 2006

Online since:

May 2006

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$35.00

[1] Z. Ignaszak, P. Popielarski: Thermophysical properties of iso-exothermic sleeves determinated by inverse problem method, (in Polish). Archiwum Odlewnictwa (Archive of Foundry), vol. 9, year 3, (2003) pp.209-220.

[2] Z. Ignaszak, P. Popielarski: Use of inverse solution to determine thermophysical properties of insulating-exothermic sleeves. Proceedings of 13th European Conference on Digital Simulation for Virtual Prototyping, Virtual Manufacturing and Virtual Environment, October 16 - 17, 2003, Mainz, Germany.

[3] Z. Ignaszak: Virtual Prototyping in the Foundry. Data bases and validation. (in Polish). Edition of Poznan University of technology. Poznan 2002. p.294.

[4] S. Bursa, Chemia fizyczna, (in Polish) Edition: PWN, Warszawa, (1976).

[5] Z. Ignaszak: Etudes expérimentales des matériaux isolants et iso-exothermiques utilisés comme manchons et plaquettes pour le masselottage. Rapports. Groupe Métallurgique Ferry- Capitain, Joinville , France ; 2000-(2004).

[6] M. Rappaz; J.L. Desbiolles, J.M. Drezet, Ch.A. Gandin, A. Jacot, Ph. Thévoz: Application of inverse methods to the estimation of boundary conditions and properties, Proceedings of VII International Conference "Modelling of Casting, Welding and Advanced Solidification Processes, The Minerals, London, Metals &Materials Society, (1995).

[7] System Calcosoft-2D, manual, Calcom & EPFL, Lausanne, (2001).

[8] P. Popielarski Thermophysical parameters of mould in modelling and simulation of foundry processes, (in Polish). Doctor thesis supervised by Z. Ignaszak. Politechnika Poznańska, Poznań (2004).

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