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Two-group interfacial drag force model for downward dispersed two-phase flows
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DOI：10.1016/j.pnucene.2026.106470.png)
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Abstract
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• 1G drag force models oversimplify bubble dynamics, limiting physical fidelity. • Two 2G interfacial drag force models were developed for downward flows. • 2G models for relative velocity, shape factor, and drag coefficient were developed. • Downward flows tend to show larger void fraction covariances due to the coring effect. • 2G IDF models achieve good accuracy and enhanced physical fidelity.
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