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  • A meshless approach for solving binary alloy solidification with moving grains [Elektronski vir]
    Mramor, Katarina, fizik ; Hatić, Vanja ; Šarler, Božidar
    This work describes the application of the discrete approximate meshless method with the explicit Euler time scheme for simulating the solidification of a binary alloy with grain motion in a square ... cavity. The volume-averaged physical model couples mass, momentum, species, and energy transport equations by dividing the flow into the porous region with stationary solid phase and into the slurry region with free motion of the solid grains. The motion of solid grains in the slurry region is coupled with the motion of the liquid phase, and with the pressure and buoyancy of the solid phase. The nucleation of grains is described with the grain population transport equation. On the microscopic scale, the assumption of infinitely fast diffusion is made by using the lever rule model. The coupling between the pressure and the velocity is solved by using the fractional step method. The performance of the method has been previously verified by comparison of the results with the reference results from the literature, based on the stationary solid phase. The influence of the node arrangement density and timestep on macrosegregation evolution and final macrosegregation pattern is analyzed and discussed for the much more computationally involved moving grains physical model.
    Source: EUROMAT 2021 [Elektronski vir] : European Congress and Exhibition on Advanced Materials and Processes : 13-17 September 2021, virtual ([1] str.)
    Type of material - conference contribution ; adult, serious
    Publish date - 2021
    Language - english
    COBISS.SI-ID - 79649539

    Link(s):

    https://submit.asmet.org/event/53/contributions/3427/

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