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Meshless CFD

From CAD User Mechanical Magazine Vol 25 No 05 - June/July 2012

Desktop Engineering introduces XFlow, meshless CFD that simplifies the simulation of gases and liquids

Desktop Engineering (DTE), a leading engineering software solutions provider and strategic business partner of MSC Software, has announced the UK launch of MSC's XFlow 2012; a state of the art Computational Fluid Dynamics (CFD) solution. The latest release of XFlow has been written to run on all Linux platforms as well as Windows, and also now features distributed memory processing across HPC clusters to offer near linear scalability of analysis.

XFlow is a powerful CFD technology from Next Limit Technologies, a strategic partner of MSC Software, that uses a proprietary, particle-based, meshless approach which can easily handle traditionally complex problems in sectors such as engineering, design, science, and architecture. XFlow provides the ability to simulate the flow of gases and liquids, heat and mass transfer, moving bodies, multiphase physics, acoustics and fluid structure interaction.

The XFlow approach to CFD enables complex modeling and analysis in a straightforward way, minimizing the presence of algorithmic parameters and avoiding the traditionally time consuming meshing process, and designed for engineers and analysts who require quick and accurate feedback on flow, thermal, and acoustic behaviour.

XFlow, which utilises a proprietary particle-based approach to Computational Fluid Dynamics and which is easy to set up and use, significantly reduces training, implementation and support costs, and dramatically improves the solution quality versus time-to-solution trade-off, lowering times and costs. XFlow’s advanced techniques easily handle traditionally complex problems such as aero-acoustics, moving parts, free surface flows and fluid-structure interaction, offering a real alternative to, either, analysis in experimental facilities, or the need to install high end or large clusters of workstations, allowing complex problems to be solved on standard modern desktop computers.

Key features of Xflow 2012
The meshless approach within XFlow is particle-based and fully Lagrangian, which means classic fluid domain meshing is not required and surface complexity is not a limiting factor. XFlow uses a novel particle-based kinetic solver that resolves the Boltzman and the compressible Navier-Stokes equations. The solver features state of the art LES (Large Eddy Simulation) modelling, and advanced non-equilibrium wall models. As such, it is capable of handling large and complex models, and greatly simplifies the setup of analysis with moving parts, forced or constrained motion or contact modelling. XFlow's solver also features thermal analysis, flow through porous media, non-Newtonian flows and complex boundary conditions including porous jump and fan models.

XFlow's engine automatically adapts the resolved scales to the user's requirements, refining the quality of the solution near the walls and dynamically adapting to the wake while the flow develops.

The software uses a single, consistent, unified non-equilibrium wall function to model the boundary layer. This wall model works in all cases, meaning that it is not necessary to select between different algorithms and to take care of different limitations related to each scheme. Although performance needs are less than traditional mesh-based CFD solutions, XFlow can be upscaled to handle much larger simulations, with near-linear scaleability, as it is fully parallelised for multi-core technology.

Desktop Engineering
Founded in 1986, Desktop Engineering (DTE) is well known, and has developed an extensive customer base in the automotive, aerospace, architecture and general mechanical engineering markets. The company is a strategic partner of MSC Software, well established developers of CFD and other simulation applications and solvers, and supports industry standards such as Nastran, Patran, Marc, XFlow and Adams.

As a full service provider, DTE can help companies train its analysts, and supports its customers in the use and application of the solutions, together with methodology development to improve design productivity and efficiency.
www.dte.co.uk

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