Special Modeling Options: Cavitation Potential
Comparison of FLOW-3D results
to real world case, area of
cavitation is correctly located
This new model is designed to predict die erosion due to cavitation during filling in high pressure die casting. Metal pressure can drop several atmospheres below the metal vapor pressure in areas of very fast flow, possibly causing cavitation and erosion.
A simple way to predict damage due to cavitation is to predict the likelihood of the cavitation, or the cavitation potential, without actually introducing cavitating bubbles into the flow. FLOW-3D evaluates this by looking at the difference between the cavitation pressure and the local fluid pressure. The potential for cavitation and die erosion at the cell’s location is deemed to exist when this difference is large. The most reliable indications of possible die erosion are highly-localized "hot spots," that is, small areas with high values of this quantity. In the images, a comparison of FLOW-3D results to a real-world case, the area of cavitation was correctly located.
Read more in our
Casting Tech Papers