What is it about?
Numerical predictions of solidification and melting often show a great dependency on the value of the mushy-zone constant when using the fixed-grid enthalpy-porosity technique. The present work focuses on investigating the sensitivity of numerical predictions to the value of the mushy-zone constant and proposes a novel approach to assess this sensitivity.
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Why is it important?
We demonstrated how the computational grid size and numerical implementations can affect numerical predictions of solidification and melting. We showed how grid-dependency of numerical simulations can affect sensitivity to the value of the mushy-zone constant, and how this can be avoided. Additionally, we showed under which circumstances sensitivity of numerical predictions to the value of the mushy-zone constant is significant.
Perspectives
Tuning the value of the mushy-zone constant to obtain an agreement between numerical and experimental results is a common practice. However, the results presented in the present paper reveal to what extent the results are sensitive to the value of the mushy-zone constant and how this value should be chosen to achieve reliable solutions.
Dr. Amin Ebrahimi
Delft University of Technology
Read the Original
This page is a summary of: Sensitivity of Numerical Predictions to the Permeability Coefficient in Simulations of Melting and Solidification Using the Enthalpy-Porosity Method, Energies, November 2019, MDPI AG,
DOI: 10.3390/en12224360.
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