The fastest coupled solver in the CFD market, according to multiple customers.
The coupled solver technology in ELEMENTS has been extensively tested and validated for automotive applications, with proven significant improvements in convergence speed and stability.
what ELEMENTS-Coupled can do for you
Unlock the performance of your CFD vehicle design applications with ELEMENTS-Coupled.
BENEFITS
ELEMENTS-Coupled: the best choice to boost performance of your CFD applications.
ELEMENTS-Coupled offers a fully implicit, pressure-based, block-coupled solver for all incompressible and compressible flows, delivering convergence speeds up to 10 times faster than standard segregated solvers.
For companies running hundreds of CFD simulations annually on HPC hardware, boosting performance by 2-5x can significantly reduce computing costs.
COUPLED VS. CONVENTIONAL SOLVERS
Boost performance with equal accuracy.
Extensive validation
The coupled solver technology has been thoroughly tested for automotive applications. The block-coupled approach offers significant benefits over conventional solvers in terms of convergence speed and robustness, while maintaining accuracy.
ELEMENTS-COUPLED FAQ
Frequently Asked Questions about ELEMENTS-Coupled.
Do both pressure- and density-based solvers support all segregated solver features?
The pressure-based solver is compatible with most of the physics modules available in ELEMENTS, such as steady-state and transient flows, RANS, uRANS, DES, and LES turbulence models, heat transfer, motion sources, multiple reference frames (MRF), generalized reference frames (GRF), porous media, momentum sources, dynamic mesh motion, etc.
The density-based solver, on the other hand, is not compatible with multiple and generalized reference frames (MRF and GRF), porous media, momentum sources, and the dynamic mesh motion libraries are currently only available through ELEMENTS-Core (no GUI interface).
Are there any specific mesh requirements for ELEMENTS-Coupled?
In general, meshing requirements for the coupled solver are no different from those used for the segregated solver. However, it should be noted that the coupled solver tends to be more permissive with poor quality grids and large aspect ratio cells than the equivalent segregated states. This does not mean that good meshes are not preferred, but simply that greater robustness can be expected when using the coupled approach.
How much faster is ELEMENTS-Coupled in comparison to the standard segregated solver?
The convergence speed-up varies by case. Based on our validation tests and customer feedback, we have observed speed improvements ranging from 2 to 10 times.
References
Karpouzas, G.K. A Hybrid Method for Shape And Topology Optimization in Fluid Mechanics. Engys Ltd. s.l. : NTUA, 2018.
Darwish, M, Sraj, I and Moukalled, F. A coupled finite volume solver for the solution of incompressible flows on unstructured grids. Journal of Computational Physics. 2009.
Council for Scientific and Industrial Research in South Africa (CSIR). High Speed Aerodynamic (HiSA) Solver. GitLab Project Page. [Online] https://hisa.gitlab.io/.
Heyns, J.A., Oxtoby, O.F. and Steenkamp, A. Modelling High-speed Flow Using a Matrix-free Coupled Solver. 9th OpenFOAM Workshop. 2014.
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