SPH-Flow Explorer & Designer


An innovative approach to simulate what others can’t

SPH-flow is one of the most advanced Smoothed-Particle Hydrodynamics (SPH) solver dedicated to complex Computational Fluid Dynamics (CFD) simulation developed by Nextflow Software and its academic partners. 

The SPH method is part of a new generation of numerical methods, developed to overcome meshing-related constraints with traditional approach while still being based on the Navier-Stokes equations. Classical methods like Finite Volume that require volume meshing are not suitable for many applications such as dynamic flows with complex interfaces, which SPH can address. 

Thanks to its Lagrangian characteristic and its particle-based approach, SPH-flow is particularly well suited for high-dynamics flows, deformable and complex boundaries, interfaces with fragmentations/reconnections such as: solid impacts, shocks, breaking waves, jets and splashes, moving parts, deformations…

SPH-flow can solve complex applications, such as: complex topologies and geometries, complex free surface problems, complex physics involving multi-fluid simulations, fluid structure interactions.

SPH, the particle-based method, sets a new market standard in CFD

The main characteristics of the SPH method are:

  • SPH solves the Navier-Stokes equations by representing fluid flows with moving particles. It is especially well adapted for simulations involving complex solid interfaces (body motion, deformation, contact…) and fluid interfaces (multiphase, atomization, coalescence…). Traditional FV methods are often limited by their mesh-based nature and can’t simulate effectively such interfaces.
  • SPH does not rely on manual meshing and allows users to launch fluid flow simulations few minutes after getting their CAD files ready. Traditional mesh-based FV methods require tedious and user-dependent manual meshing operations, taking hours or even days of highly skilled engineers.

Different solvers for addressing all objectives, applications and use cases with SPH

SPH-flow, Nextflow Software’s SPH offering, includes 2 complementary products to address all engineering needs:

  1. SPH-flow Explorer is typically used in pre-study design exploration phase, where fast simulations are expected to guide and orient early design choices.
  2. SPH-flow Designer provides reliable and in-depth insights, useful for later-stage design analysis.

SPH-flow Designer uses the most-advanced and state-of-the-art SPH models, improving accuracy and convergence order, even when complex multi-physics are involved: multiphase flows, surface tension with wettability, Fluid-Structure Interactions (FSI), thermal analysis, SPH-LBM (Lattice Boltzmann Method) and SPH-FV co-simulation…

SPH-flow Explorer is a brand-new product optimized to deliver results as fast as possible, offering the shortest time-to-result/solution time.

SPH-flow is available today for workstations and small servers, as well as for High-Performance Computing (HPC) clusters when large computation capacities are required. A version for GPU is currently under development and will be available early 2021.

SPH-flow can be 5 to 100 times faster than FV solvers on specific applications that best fit with the SPH method, meaning that 1 week of computation may now shrink to few hours, with often better simulation results compared to FV on such applications.


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