A quasi-stationary numerical model of atomized metal droplets, I: Model formulation

Jesper Henri Hattel, Nini H Pryds, Jesper Thorborg, Preben Ottosen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    A mathematical model for accelerating powder particles by a gas and for their thermal behavior during flight has been developed. Usually, dealing with the solidification of metal droplets, the interaction between an array of droplets and the surrounding gas is not integrated into the modeling of such a process, e.g. in the literature the gas temperature is often modeled by an empirical expression. In the present model, however, the interaction between the enveloping gas and an array of droplets has been coupled and calculated numerically. The applicability of the empirical relation of the gas temperature proposed in the literature has been discussed in relation to the present model. One of the major advantages of the present modeling is that it provides a tool to predict the thermal behavior of droplets during flight without the need of experimental parameters, i.e. gas temperature. Furthermore, the model predicts the effect of process parameters on the size distribution, temperature, velocity histories, fraction-solid and cooling rate for all droplet sizes characterizing the complete droplet size distribution.
    Original languageEnglish
    JournalModelling and Simulation in Materials Science and Engineering
    Volume7
    Issue number3
    Pages (from-to)413-430
    ISSN0965-0393
    Publication statusPublished - 1999

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