Modeling Fluid Turbulence During Mold Filling
In modern foundry engineering, controlling fluid turbulence during mold filling is critical to producing defect-free castings. PoligonCast leverages advanced simulation to predict, analyze, and optimize metal flow — transforming how manufacturers approach casting quality.
Why Turbulence Matters
When molten metal enters a mold at high velocity, turbulent flow creates serious defects that compromise casting integrity and increase scrap rates.
Uncontrolled Flow
High turbulence increases oxidation, gas entrapment, and premature solidification throughout the casting cavity.
Oxide Inclusions
Turbulence entraps oxides, weakening the final part and reducing mechanical performance.
Porosity
Air entrapment creates internal voids that reduce strength and reliability.
Cold Shuts
Premature solidification caused by chaotic flow patterns prevents proper fusion.
When molten metal enters a mold at high velocity, turbulent flow creates serious defects that compromise casting integrity and increase scrap rates.
High turbulence increases oxidation, gas entrapment, and premature solidification throughout the casting cavity.
Turbulence entraps oxides, weakening the final part and reducing mechanical performance.
Air entrapment creates internal voids that reduce strength and reliability.
Premature solidification caused by chaotic flow patterns prevents proper fusion.
Why Turbulence Matters
Uncontrolled Flow
Oxide Inclusions
Porosity
Cold Shuts
High-velocity metal jet enters mold.
Flow patterns and vortices develop.
Turbulence dampens as metal cools.
Accurate turbulence modeling requires solving the Navier-Stokes equations coupled with turbulence models such as k-ε and k-ω SST — capturing velocity gradients, pressure fluctuations, and free-surface behavior throughout the fill cycle.
The Physics of Mold Filling
Ingate Entry
Cavity Filling
Solidification Front
Advanced Turbulence Modeling
Computational Fluid Dynamics resolves turbulent eddies and free-surface dynamics with high fidelity.
Tracks the metal-air interface to predict entrainment and surface folding throughout mold filling.
k-ε and k-ω SST models calibrated specifically for high-temperature metallic flows and complex mold geometries.
Simulation Approaches at PoligonCast
CFD-Based Modeling
Volume of Fluid (VOF)
Turbulence Models
Effective turbulence suppression requires simultaneous optimization of multiple interdependent variables. PoligonCast's simulation platform evaluates all parameters in a unified digital environment — enabling engineers to identify the optimal filling strategy before any metal is poured.
A 10% reduction in gate velocity can reduce oxide entrapment by up to 40% in aluminum castings, highlighting the importance of simulation-driven turbulence control and optimized gating design.
Key Parameters in Turbulence Control
Gate Velocity
Pour Temperature
Turbulence Optimization
Gate Geometry
Fill Rate
Engineering Insight
Identify turbulence hotspots and redesign gating systems digitally — eliminating costly trial pours.
Simulation-driven runner and ingate redesign reduces turbulence at the source.
Validated simulation workflows consistently lower scrap rates and improve mechanical properties.
From Simulation to Superior Castings
Virtual Validation
Gating Optimization
Defect Reduction
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