Evaluating the influence of selected parameters on sensitivity of a numerical model of solidification

• Autorzy: Sczygiol N. , Dyja R.
• Języki publikacji: EN

Abstrakty

EN

Presented paper contains evaluation of influence of selected parameters on sensitivity of a numerical model of solidification. The investigated model is based on the heat conduction equation with a heat source and solved using the finite element method (FEM). The model is built with the use of enthalpy formulation for solidification and using an intermediate solid fraction growth model. The model sensitivity is studied with the use of Morris method, which is one of global sensitivity methods. Characteristic feature of the global methods is necessity to conduct a series of simulations applying the investigated model with appropriately chosen model parameters. The advantage of Morris method is possibility to reduce the number of necessary simulations. Results of the presented work allow to answer the question how generic sensitivity analysis results are, particularly if sensitivity analysis results depend only on model characteristics and not on things such as density of the finite element mesh or shape of the region. Results of this research allow to conclude that sensitivity analysis with use of Morris method depends only on characteristic of the investigated model.

Słowa kluczowe

EN

computer aided foundry; sensitivity analysis; Morris method; modelling of solidification; intermediate model

PL

komputerowe wspomaganie odlewni; analiza wrażliwości; modelowanie krzepnięcia

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2007
• Tom: Vol. 7, iss. 4
• Strony: 159--164
• Opis fizyczny: Bibliogr. 11 poz., rys., tab., wykr.

Twórcy

autor

Sczygiol N.

autor

Dyja R.

• Institute of Computer and Information Sciences, Częstochowa University of Technology, Dąbrowskiego St 73, 42-200 Częstochowa, Poland,

Bibliografia

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• [2] M. D. Morris, Input screening: Finding the important model inputs on a budget, Reliability Engineering and System Safety 91 (2006), 1252-1256.
• [3] F. Campologno, A. Saltelli, Sensitivity analysis of an envinronmental model: an application of different analysis methods, Reliability Engineering and System Safety, 57 (1997), 49-69.
• [4] S. Tomlin, The use of global uncertainty methods for the evaluation of combustion mechanism, Reliability Engineering and System Safety, 91 (2006), 1219-1231.
• [5] Saltelli, R. Bolado, An alternative way to compute Fourier amplitude sensitivity test (FAST), Computational Statistics and Data Analysis 26 (1998), 445-460.
• [6] Y. Lu, S. Mohanty, Sensitivity analysis of a complex, proposed geologic waste disposal system using the Fourier Amplitude Sensitivity Test method, Reliability Engineering and System Safety 72 (2001), 275-291.
• [7] M. D. Morris, Factorial Sampling Plans for Preliminary Computational Experiments, Technometrics, 33 (1991), 161-174.
• [8] Saltelli, S. Tarantola, F. Campologno, M. Ratto, Sensitivity analysis in practice: a guide to assessing scientific models, John Wiley & Sons, Chichester, 2004.
• [9] N. Sczygiol, R. Dyja, The use of Morris method in sensitivity analysis of the numeric model of solidification, Computer Methods in Material Science 7 (2007), 250-254.
• [10] N. Sczygiol, Numerical modelling of thermo-mechanical phenomena in a solidifying casting and a mould, Wyd. Politechniki Częstochowskiej, Częstochowa (in Polish), 2000.
• [11] N. Sczygiol, G. Szwarc, Application of enthalpy formulation for numerical simulation of castings solidification, Computer Assisted Mechanics and Engineering Sciences 8 (2001) 99-120.
• [12] W. L. Wood, Practical time-stepping schemes, Clarendon Press, Oxford 1990.