nekRS
26.0
  • Quickstart
    • Before You Begin…
    • Installing NekRS
      • Acquiring the Code
      • Building NekRS
      • Setting the Environment
    • Running your first simulation
    • Scripts
    • Visualization
  • Problem Setup
    • Case files
      • Parameter File (.par)
        • User Sections
        • General Parameters
        • OCCA Parameters
        • Problem Type Parameters
        • Mesh Parameters
        • Field Settings
        • CVODE Parameters
        • NekNek Parameters
      • User-Defined Host File (.udf)
        • OKL block
        • UDF_Setup0
        • UDF_LoadKernels
        • UDF_Setup
        • UDF_ExecuteStep
      • Legacy Nek5000 User File (.usr)
        • Legacy Data Interface
      • Mesh File (.re2)
      • NekNek Session File (.sess)
      • Trigger File (nekrs.upd)
      • NekRS Files & Extensions
    • Boundary conditions
      • Basic boundary conditions
        • Zero-value BC
        • User-value BC
        • Internal / periodic BC
      • Special cases
        • NekNek coupling
        • Turbulent inflow
        • Velocity recycling
        • Stabilized outflow [Dong]
    • Initial conditions
      • Specification in .udf File
      • Restarting from Field File(s)
      • Legacy useric in .usr File
    • Physical properties
      • Constant Properties
      • Variable Properties
      • Conjugate Heat Transfer
    • Models and Source Terms
      • Turbulence models
        • Large Eddy Simulation (LES)
        • RANS models
      • Low-Mach Compressible Model
      • Custom Source Terms
        • Momentum Equation
        • Scalar Equations
    • Mesh & Meshing
      • Runtime Setup
        • Coordinates Modification
        • Sidesets & Boundary Tags
        • Connectivity
      • Nek5000 Meshing Tools
        • genbox
        • n2to3
        • reatore2
      • Convert External Meshes
        • Gmsh (gmsh2nek)
        • Exodus II (exo2nek)
        • Tet-to-Hex
      • Moving Mesh
      • Conjugate Heat Transfer
      • h-Refinement
      • Miscellaneous Tips
    • Postprocessing
      • Checkpointing & Visualization
        • Adding Custom Fields
        • Adding Custom Output File
        • Element Filter
      • Compute Derived Quantity
        • Array Operators
        • Spatial Derivatives
        • Spatial Integrals
        • Strain & Rotation Rate
        • Aero-Forces
        • Q criterion
      • Averaging
        • Time Averaging
        • Time Averaging (Legacy Mode)
        • Planar Averaging
      • ADIOS2 Format (.bp/)
      • Data Extraction
      • Insitu Visualization
      • Legacy Support (userchk)
    • Running
      • Native Running
        • MPI launch scripts
      • Running on HPC Systems
      • Runtime Control with Signals
    • Debugging Tips
      • Just-in-time Compilation
      • Verbose and Debug Mode
      • Check Device Arrays
      • Kernel in Serial Mode
      • Synchronization
      • Using gdb
        • Attaching to a Process
        • Attach Mode
        • Launch NekRS under gdb
  • Tutorials
    • Fully Developed Laminar Flow
      • Before You Begin
      • Mesh Generation
      • Control parameters file (.par)
      • User-Defined Host Functions File (.udf)
        • Loading user parameters
        • Initial Conditions
        • Boundary Conditions
        • Execute Step Routine
      • Running the case
      • Post-processing the results
    • Conjugate Heat Transfer
      • Governing Equations and Thermo-fluid Properties
      • Geometry and Boundary Conditions
      • Mesh Generation
      • Control Parameters (.par file)
      • User-Defined Host Functions File (.udf)
        • Loading User Parameters
        • Initializations
        • Custom Buoyancy Source
        • Boundary Conditions and Buoyancy Force (okl block)
        • UDF_ExecuteStep
      • Compilation and Running
      • Results
    • RANS Channel
      • Before You Begin
      • Mesh and Boundary Conditions
      • Control Parameters (.par file)
      • User-defined Host Functions File (.udf file)
        • Diffusion and Source terms
        • Mesh Modification
        • Initial Conditions
        • RANS Setup
        • Boundary Conditions
        • Execute Step Routine
      • Compilation and Running
      • Results
      • Optional: Post-processing Routines
        • Data Extraction Along a Line
        • Compute Friction Velocity
  • Developer guide
    • Doxygen
    • Contributing
    • How to contribute
  • Theory
    • Computational Approach
    • Incompressible Navier-Stokes Equations
      • Non-Dimensional Navier-Stokes
    • Stokes Flow
    • Energy Equation
      • Non-Dimensional Energy / Passive Scalar Equation
    • Low-Mach Compressible Flow Equations
      • Low-Mach Equations with Ideal Gas Assumption
    • RANS Models
  • Other Resources
    • OCCA Memory
    • Mesh Class (mesh_t)
    • Linear Algebra Functions (linAlg)
    • SEM Operators (opSEM)
    • Building the Nek5000 Tools
  • Glossary
  • References
nekRS
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