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  • On advantages of strong-form local meshless methods for phase-field modelling of dendritic solidification [Elektronski vir]
    Dobravec, Tadej ; Mavrič, Boštjan, 1989- ; Šarler, Božidar
    The strong-form local meshless methods are applied to solve phase-field models for dendritic solidification. Dendrites, tree-like branched structures, are the most common microstructure in the ... solidification processing of metals. The microstructure evolution directly controls the properties of solidified material. Therefore, understanding dendritic solidification plays a crucial role in the quality assurance of the solidified product. The phase-field method represents the preferred technique for predicting dendritic microstructure under various casting conditions. The strongform meshless methods turn out to be very suitable for solving phase-field models for dendritic growth. The solution of these models is prone to mesh-induced anisotropy, which can be in the meshless methods straightforwardly circumvented by using scattered node distributions. In the present contribution, the radial basis function generated finite difference method and the diffuse approximate method are tested on regular and scattered node distributions. The emphasis is given to the analysis of the growth in arbitrary preferential growth directions. The influence of node distribution type on the accuracy is thoroughly analysed for both methods. Additionally, a space-time adaptive algorithm developed to accelerate meshless calculations is presented. The algorithm dynamically ensures the highest density of computational nodes and the finest time-stepping at the solid-liquid interface.
    Source: SIAM 2023 [Elektronski vir] : SIAM Conference on Computational Science and Engineering (CSE23), February 7-March 3, 2023, [Amsterdam, The Netherlands] : searchable abstracts document (Str. 283)
    Type of material - conference contribution ; adult, serious
    Publish date - 2023
    Language - english
    COBISS.SI-ID - 144743427

    Link(s):

    https://www.siam.org/Portals/0/Conferences/CSE23/CSE23_ABSTRACTS.pdf
    https://meetings.siam.org/sess/dsp_talk.cfm?p=124327

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