Problems with several millions of unknowns in 3D and several tens of millions of unknowns in 2D have been solved within minutes on up to 32 cores/64 threads (see report). A massive amount of data can be stored for delayed, remote post-processing thanks to the ultra compact. Problems with a transient, (multi)harmonic or damped/undamped eigenmode analysis. Sparselizard can handle a general set of problems in 3D, 2D axisymmetric, 2D and 1D such as mechanical (anisotropic elasticity, geometric nonlinearity, buckling, contact, crystal orientation), fluid flow (laminar, creeping, incompressible, compressible), stabilized advection-diffusion, nonlinear acoustic, thermal, thermoacoustic, fluid-structure interaction, electric, magnetic, electromagnetic, piezoelectric, superconductor. FEM simulations can be weakly or strongly coupled to lumped electric circuits. A fast algorithm for mesh-to-mesh interpolation and a general implementation of the mortar finite element method allow to easily work with non-matching meshes and provide general periodic conditions.
Efficient conformal adaptive mesh refinement ( AMR) is provided for 3D, 2D and 1D problems. General high-performance domain decomposition methods are available for large-scale simulations on computing clusters (contact Quanscient for commercial applications).
Gmsh file flow around a cylinder software#
It is carefully validated against analytical solutions, third party software and lab measurements.
Gmsh file flow around a cylinder mac#
Geuzaine, University of Liege) is a high-performance, multiphysics, hp-adaptive, open source C++ finite element library running on Linux, Mac and Windows. Numerical Study and Physical Analysis of the Pressure and Velocity Field in the Near Wake of a Circular Cylinder. Development of a high-order continuous Galerkin sharp-interface immersed boundary method and its application to incompressible flow problems, Barbeau, L., Étienne, S., Béguin, C., & Blais, B. A semi-implicit immersed boundary method and its application to viscous mixing. Blais, B., Lassaigne, M., Goniva, C., Fradette, L., & Bertrand, F. Investigate the impact of the time-step and the time-stepping scheme (e.g., sdirk 3 or bdf 3) Repeat the same example in 3D for a cylinder/sphere and study the effect on the drag and lift forces. Increase the Reynolds number to study a completely turbulent wake and the drag crisis phenomenon. Study the vortex shedding of other bluff bodies. Using Paraview the following velocity and pressure fields can be visualized in time: 6.7. The frequency of vortex shedding is related to the Strouhal number: This vortex shedding causes a fluctuating pressure force acting on the cylinder, resulting in oscillations of the drag and lift coefficients in time. These vortices successively detach from the cylinder in a periodic manner (vortex shedding), leading to the generation of the von Kármán vortex street pattern in the wake. The flow field features a stable laminar boundary layer at the cylinder leading edge and a recirculation zone behind it formed by two unstable vortices of opposite signs. We re-use the geometry and mesh presented in 2D Flow around a cylinder, which were taken from Blais et al. We simulate the flow around a fixed cylinder with a constant upstream fluid velocity. Geometry file: /examples/incompressible_flow/2d_transient-flow_around_cylinder/cylinder_structured.geo Mesh file: /examples/incompressible_flow/2d_transient-flow_around_cylinder/cylinder_structured.msh Parameter file: /examples/incompressible_flow/2d_transient-flow_around_cylinder/cylinder.prm Usage of Gnuplot and Python scripts for the data post-processing Solver: gls_navier_stokes_2d (with Q2-Q1) This example corresponds to a transient flow around a fixed cylinder at a high Reynolds number.