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When we initially consider the analysis of unsteady phenomena in turbomachinery, aeroelasticity and aeroacoustics, we’re quickly confronted by the simulation cost – transient analyses by their very nature will simply take longer to run compared to steady ones. And for these types of problems, where the simulation objectives (understanding of flutter and limit cycle oscillations for example) demand a time-dependent treatment, the time steps need to be small and the physical time required can be long. Not that this isn’t challenging enough, usually, the entire machine needs to be modeled at a high level of spatial fidelity, thereby driving up the size and cost of the analysis even further. But, all is not lost– enter the Harmonic Balance method, first introduced with STAR-CCM+ 4.04 in 2009, capable of delivering at least a 10-fold reduction in your time to a solution. And, that’s not the only benefit to be had with this approach – it’s possible to mesh just a single blade passage through all the blade rows in your machine and obtain a solution which varies from blade-to-blade, capturing critical blade row interactions.
STAR-CCM+® v9.06 breaks new ground in biomedical devices, aeroacoustics, chemical processes and many other sophisticated modeling applications. New York and London. October 29, 2014 CD-adapco™, the largest privately held CFD focused provider of Computer Aided Engineering software, today announced the release of STAR-CCM+ v9.06. The new release allows engineers to get simulations closer to the final product by accounting for factors that are likely to significantly influence the performance of a design in operation. Throughput improvements make this level of accuracy a practical reality. “We...
Overset Mesh is one of the coolest technologies in STAR-CCM+ as it allows objects to move around your computational domain freely without tying your mesh in knots, be that an overtaking car, an excavator arm, or the complex multiple motions involved in a production line. The motion does not even have to be prescribed, the Dynamic Fluid Body Interaction (DFBI) model allows you to solve for motion, in six degrees of freedom or less, based on the forces and moments acting on a body, such as a boat on a free surface, or a ball in a ball valve. To date, however, there has been one major constraint when using Overset Mesh, namely that all gaps had to be resolved with at least 2-4 cells, however small the gap, for Overset Mesh to work correctly. This limitation meant that for some cases with very small gaps, users had to choose between excessive cell counts or increasing the gap size in an unphysical manner. The upcoming release of STAR-CCM+ v9.06 removes that constraint with the introduction of gap handling for Overset Mesh via the new “Zero Gap” Interface type.
An aircraft wing flap deflection – the dynamic intersection of the two bodies is achieved by Overset Mesh gap handling
An aircraft wing flap deflection – the dynamic intersection of the two bodies is achieved by Overset Mesh gap handling
An aircraft wing flap deflection – the dynamic intersection of the two bodies is achieved by Overset Mesh gap handling
An aircraft wing flap deflection – the dynamic intersection of the two bodies is achieved by Overset Mesh gap handling.
Ball Valve with Overset Gap handling
Ball Valve with Overset Gap handling
Ball Valve with Overset Gap handling
Ball Valve with Overset Gap handling

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