As an early adopter of new technologies, ACMA has acquired a license for STAR CCM+, the flagship CFD (Computational Fluid Dynamics) package from CD Adapco. To run this specialized program, we've also purchased a high-performance computing cluster, equivalent to 16 standard desktops.
This leading-edge analysis capability enables ACMA to accurately determine the effect of viscous flows and non-linear waves on vessel hulls and in internal tanks.
Many of the analyses now performed were previously analyzed using models tested in a Tow Tank. Adding CFD capability allows ACMA to have its own “Virtual Tow Tank”. This enables analyses to be done faster, at less cost and earlier in the design cycle for maximum benefit to the client. Furthermore, in many cases, CFD actually does a better job of predicting the loading due to the incumbent limitations in model testing.
CFD analyses are particularly useful in the following types of projects:
• Vessel Resistance prediction
• Vessel Motions prediction in regular and random seas,
both stationary and underway
• Dynamic Hydrostatic/Hydrodynamic Loading on
vessel structures
• Accurate prediction of the viscous effects on moored
vessels
• Analysis of sloshing loads inside partially-filled cargo or
ballast tanks
• Hull design optimization through flow visualization
• Conjugate Heat Transfer analyses for structures on
vessels carrying refrigerated cargo (CNG, LNG or similar)
A responsible design process still includes Tank Testing as part of the program, but the inclusion of a detailed CFD analysis ahead of Tank Testing allows testing to focus on confirmation of the analyses and also provides the engineering team with a clearer picture of what they can expect to see in the model basin.
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