Why is XFlow so different to the current CFD solutions? Simple particle-based approach that avoid the traditional meshing process

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2 Breaking Limitatins The Challenge f Traditinal CFD In the traditinal mesh-based apprach, the reliability highly depends n the quality f the mesh, and engineers spend mst f the time wrking n the discretizatin. Furthermre, there are severe difficulties in dealing with the changes in the tplgy f the dmain fr prblems invlving the presence f mving parts r fluid-structure interactin. Why is XFlw s different t the current CFD slutins? Simple particle-based apprach that avid the traditinal meshing prcess XFlw is a next generatin CFD sftware system that uses a prprietary state-f-the-art Lattice Bltzmann technlgy, and is specifically designed fr cmpanies wh require accurate feedback n flw simulatin, transient aerdynamics, water management and fluid-structure interactin. The XFlw apprach t CFD simplifies the wrkflw, minimizes the presence f algrithmic parameters and avids the traditinally time cnsuming meshing prcess. With XFlw, cmplex mdeling becmes affrdable in a straightfrward way. Unique CFD apprach Beynd Lattice Bltzmann In nn-equilibrium statistical mechanics, the Bltzmann equatin describes the behavir f a gas mdeled at messcpic scale. The Bltzmann equatin is able t reprduce the hydrdynamic limit but can als mdel rarified media with applicatins t aerspace, micrfluidics r even near vacuum cnditins. As ppsed t standard MRT, the scattering peratr in XFlw is implemented in central mment space, naturally imprving the Galilean invariance, the accuracy and the stability f the cde.

3 Meshless Particle-based kinetic slver XFlw features a nvel particle-based kinetic algrithm that has been specifically designed t perfrm very fast with accessible hardware. The discretizatin apprach in XFlw avids the classic dmain meshing prcess and the surface cmplexity is nt a limiting factr anymre. The user can easily cntrl the level f detail f the underlying lattice with a small set f parameters, the lattice is tlerant t the quality f the input gemetry, and adapts t the presence f mving parts. Adaptive wake refinement XFlw engine autmatically adapts the reslved scales t the user requirements, refining the quality f the slutin near the walls, dynamically adapting t the presence f strng gradients and refining the wake as the flw develps.

4 Turbulence mdeling: High fidelity WMLES XFlw features the highest fidelity Wall-Mdeled Large Eddy Simulatin (WMLES) apprach t the turbulence mdeling. The underlying state-f-the-art LES, based n the Wall-Adapting Lcal Eddy (WALE) viscsity mdel, prvides a cnsistent lcal eddy-viscsity and near wall behavir. It als perfrms in CPU-times similar t mst cdes prviding just RANS analysis. Single cnsistent wall mdel. XFlw uses a unified nn-equilibrium wall functin t mdel the bundary layer. This wall mdel wrks in mst cases, meaning that the user d nt have t select between different mdels and take care f the limitatins related t each scheme. Advanced analysis capabilities XFlw slver als features: Thermal analysis Flw thrugh prus media Nn-Newtnian flws Cnjugated heat transfer Cmplex bundary cnditins, including fan mdel r prus jump.

5 Sftware envirnment Unified envirnment fr pre-prcessr, slver and pst-prcessr XFlw prvides a unique and nvel interface and wrking envirnment fr the user. The pre-prcessr, slver and pstprcessr are fully integrated in the same UI envirnment. The UI layut is fully cnfigurable with mveable wrkspace windws and ptins t use pre-set display settings. Pre-prcessing Being particle-based, the algrithms behind XFlw lwer the requirements impsed n the CAD mdels, e.g. fr external aerdynamics the sftware is nt cncerned with mving r crssing surfaces as sn as these define a cherent fluid vlume. Thus the cmplexity f the gemetry is nt a limiting factr in XFlw. Pst-prcessing The graphical pst-prcessing capability f XFlw allws interactive visualizatin f the slutin and allws numerical analysis even while the cmputatin is still running. XFlw prvides tls fr additinal prcessing thrugh exprt t third-party applicatins such as ParaView and EnSight Gld.

6 Near-linear scalable perfrmance DMP XFlw als perfectly integrates int yur HPC envirnment, which pens a wide range f pssibilities fr the mst demanding cmputatins. XFlw distributed slver scales efficiently even fr a large number f ndes. SMP XFlw is fast, efficient and accessible even n a standard desktp PC. XFlw is fully parallelized fr multi-cre technlgy with near-linear scalability.

7 Prcess Time: Wrkflw example XFlw drastically cuts the time spent n the preparatin f the case, and the initial dmain discretizatin. XFlw ptimizes the balance f yur engineering and cmputer time csts. Cnnectivity XFlw prvides a wide range f cnnectivity slutins, and we are always adding new cnnectins. Amng the current cnnectins are: Gemetry STEP, IGES and STL User defined input Functins and tabular data FSI One-way cupling t MSC.ADAMS Tw-way cupling t MSC.NASTRAN (cming sn) Pst-prcessing Paraview and Ensight Gld DEM One-way cupling t EDEM Extensible standard frmat CGNS

8 Markets & Applicatins Autmtive Vehicle aerdynamics with full car gemetry (including engine and under carriage) Aeracustics Passenger cmfrt, HVAC Thermal cling Mving gemetries such as rtating wheels, suspensin system, r vehicle vertaking. Free Surface such as the refueling prcess r driving thrugh water Aernautics Drag and lift predictin even fr high lift cnfiguratins Pressure and skin frictin lads distributin Mving parts such as deplyment f the landing gear, varying flaps cnfiguratin, r rtary wings. Aeracustics, ventilatin and climate cntrl systems Transnic / supersnic flws light maneuvres predictin Marine Flw arund the ship hulls: resistance predictin, wake analysis, prpeller, seakeeping and maneuvering abilities Slshing phenmena Wave prpagatin Civil engineering Airflw arund buildings, bridges and ther civil engineering wrks Free surface analysis f marine structures, dam spillways r flding f undergrund facilities Heating, air-cnditining and ventilatin f indr spaces Dispersin f cntaminants Energy Energy cnverters (aerdynamics f wind turbines, thermal clectrs...) Analysis f water wheels Natural cnvectin in slar twers Manufacturing Thermal management in electrnic devices Flw arund mving equipment such as prductin line rbts in fabricatin plants Simulatin f mixing prcesses (agitatrs, mixers) Fluids with cmplex rhelgical prperties (nn-newtnian viscsity mdels) Next Generatin CFD