Modeling of Transient Heat Transfer in Zinc Fixed-Point Cell

Krizmanić, Severino and Veliki, Tomislav and Zvizdić, Davor (2011) Modeling of Transient Heat Transfer in Zinc Fixed-Point Cell. = Modeling of Transient Heat Transfer in Zinc Fixed-Point Cell. International journal of thermophysics, 32 (1). pp. 326-336. ISSN 0195-928X. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q3 (2011). Točan broj autora: 3.

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The current fixed-point calibration practice relies on furnaces that provide best achievable uniform temperature distribution, limiting the temperature gradients to about 10 mK to 20 mK along the ingot length. This paper outlines a numerical study conducted to further reveal the influences of the temperature gradients on the physical process involved and to bring some estimates for their influence on the plateau behavior. The mathematical model of the physical process is presented, along with the numerical models used through the FLUENT software package: the transient conductive heat transfer model, the discrete ordinates radiative heat transfer model, and the solidification model. The final model is reduced to axial symmetry for the sake of feasibility with the available computational resources. The convective heat transfer is neglected as it was considered to be of minor importance for the process itself. The geometrical model covers the entire fixed-point cell assembly and distinguishes each of its elements. The paper presents six cases, varying the temperature gradients in the boundary conditions and the cold-rodding. Their influence on the physical process is explained through the temperature fields presented. The study shows that a gradient of +/- 1 K center dot m(-1) influences the plateau solely in its duration by either prolonging or shortening it by approximately 20 min.

Item Type: Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian): fixed point, modeling, transient heat transfer
Subjects: TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 300 Department of Thermodynamics, Thermal and Process Engineering > 320 Chair of Thermal and Process Engineering
1400 Department of fluid mechanics > 1410 Chair of computer fluid mechanics
Indexed in Web of Science: Yes
Indexed in Current Contents: Yes
Quartiles: Q3 (2011)
Date Deposited: 14 Apr 2016 11:17
Last Modified: 04 Sep 2017 13:15

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