NekExamples

This repository contains number of examples illustrating different features of Nek5000 CFD solver. All examples are stored in separate sub-directories containing case description (README.md) and all the files necessary to run the simulation.

Example overview

Some examples provide additional pdf files for a more complete description.

• benard
  • Test name : Benard_Ray9
  • Purpose : Rayleigh-Benard convection.
  • Features : * Customized acceleration term (userf)
• blasius
  • Test name : Blasius
  • Purpose : Blasius boundary layer test case in 2D.
  • Features :
    • "ON " boundary condition (Outflow, Normal only)
• cone/cone016, cone/cone064, cone/cone256
  • Test name : Cone16, Cone64, Cone256
  • Purpose : Convecting cone problem
  • Features :
• conj_ht
  • Test name : ConjHt
  • Purpose : 2D Poiseiulle flow moving between two heated finite thickness plates
  • Features : * Conjugate heat transfer * Scalar solve with CVODE
• conj_ht_frz
  • Test name : ConjHtFrz
  • Purpose : 2D Poiseiulle flow moving between two heated finite thickness
  • Features : * Temperature solve with frozen velocity
• eddy_neknek
  • Test name : Eddy_Neknek
  • Purpose : Eddy solutions in doubly-periodic domain domains
  • Features : * Overlapping domains
• eddy_psi_omega
  • Test name : Eddy_PsiOmega
  • Purpose : Eddy solutions in doubly-periodic domain using the streamfunction-vorticity (psi-omega) formulation
  • Features :
• eddy_rich
  • Test name : Eddy_Rich
  • Purpose : Eddy solutions with moving boundary conditions
  • Features :
• eddy_uv
  • Test name : Eddy_Uv
  • Purpose : Eddy solutions in doubly-periodic domain with an additional translational velocity
  • Features :
• expansion
  • Test name : Expansion
  • Purpose : 3D expanding pipe.
  • Features :
• ext_cyl
  • Test name : ExtCyl
  • Purpose : Flow past a cylinder in 2D.
  • Features :
    • Evaluating surface integral using objects
    • Saving history points
• fs_2
  • Test name : Fs2_St1, Fs2_St2, Fs2_StdWv
  • Purpose : Free-Surface Channel Flow.
  • Features :
• hemi
  • Test name : Hemi
  • Purpose : Particle tracking in flow past a hemispherical roughness.
  • Features : * Particle tracking using interpolation tool
• kovasznay
  • Test name : Kov
  • Purpose : Kovasznay flow an analytical two-dimensional steady solution
  • Features :
• lin_channel2D
  • Test name : LinCav_Adj, LinCav_Dir
  • Purpose : Linear direct and adjoint simulation of 2D differentially heated square cavity
  • Features :
• lin_dfh_cav
  • Test name : LinChn_Adj, LinChn_Dir
  • Purpose : Linear direct and adjoint simulation of 2D Poiseuille flow
  • Features :
• lowMach_test
  • Test name : LowMachTest
  • Purpose : Low-Mach number benchmark problem
  • Features : * Thermal divergence * Variable (solution depended) properties
• mhd
  • Test name : Mhd_Gpf
  • Purpose : Helical Forcing Dynamo
  • Features :
• moffatt
  • Test name : Moffatt, MoffCirc
  • Purpose : Moffatt eddies - Viscous Flow in a Wedge
  • Features :
• mv_cyl
  • Test name : MvCylCvode
  • Purpose : Isentropic compression/expansion in a cylinder
  • Features : * User specified mesh motion * Varying thermodynamic pressure
• mv_wall
  • Test name : MvWall
  • Purpose : 2D channel with a moving indentation
  • Features : * ALE * Outflow treatment to prevent backflow
• ocyl
  • Test name : Ocyl, Ocyl2
  • Purpose : Oscillating cylinder
  • Features : * Linear elasticity solver * ALE
• os7000
  • Test name : Os7000
  • Purpose : TS waves in plane Poiseuille flow
  • Features :
• peris
  • Test name : Peris
  • Purpose : Peristaltic flow.
  • Features : * Moving mesh with ALE * Outflow treatment to prevent backflow
• phill
  • Test name : Phill
  • Purpose : 3D flow over periodic hill
  • Features :
    • Mesh manipluation
• pipe
  • Test name : Pipe_Helix, Pipe_Stenosis, Pipe_Cyclic
  • Purpose : Pipe flow
  • Features :
    • Mesh manipluation
    • Mesh extrusion
    • Cyclic boundary condition
    • Volume forcing for azimuthal flow
• RANSChannel
  • Test name : RANSChannel
  • Purpose : Turbulent channel flow
  • Features : * kOmg turbulence model
• rayleigh
  • Test name : Rayleigh_Ray1, Rayleigh_Ray2
  • Purpose : Rayleigh-Benard convection
  • Features :
• robin
  • Test name : Robin
  • Purpose : Unsteady conduction with Robin boundary conditions
  • Features :
• shear4
  • Test name : Shear4_Shear4, Shear4_Thin
  • Purpose : Double shear-layer rollup
  • Features : * Filtering
• smoother
  • Test name : Smooth
  • Purpose : Mesh smoothing
  • Features :
• solid
  • Test name : Solid
  • Purpose : Thick-wall hollow sphere under an internal pressure
  • Features : * Steady elastic solver
• strat
  • Test name : Strat_P0001, Strat_P1000
  • Purpose : Stratified 2D flow
  • Features :
• taylor
  • Test name : Taylor
  • Purpose : Taylor-Couette flow
  • Features :
• tgv
  • Test name : Tgv
  • Purpose : Taylor Green Vortex flow
  • Features : * Performing a full restart
• turbChannel
  • Test name : TurbChannel
  • Purpose : Turbulent channel flow
  • Features : * AMG coarse grid solver * OIFS * High pass filter relaxation term * Computing wall shear stress using objects * Runnig averages computed by avg_all * Planar averaging * Extract 1D statistics using interpolation
• turbJet
  • Test name : TurbJet
  • Purpose : LES of a round turbulent jet
  • Features : * NEK-NEK to generate fully turbulent inflow boundary * OIFS * High pass filter relaxation term * Outflow treatment to prevent backflow
• turbPipe
  • Test name : TurbPipe
  • Purpose : Round turbulent pipe flow
  • Features :
• vortex
  • Test name : Vortex
  • Purpose : Vortex breakdown in a container with a rotating lid
  • Features :
• vortex2
  • Test name : Vortex2
  • Purpose : Vortex breakdown in a container with a rotating lid
  • Features : * Axissymmetric formulation
• bp5
  • Test name : bp5
  • Purpose : Ceed benchmark solving a standard Poisson equation
  • Features :
• e3q
  • Test name : e3q
  • Purpose : Eddy 3D test problem for code valiation
  • Features :