KTH_Examples

This repository contains set of examples demonstrating the use of Nek5000 framework and toolboxes developed at KTH. The more in-depth description of the framework can be found at its doxygen documentation page, which contains variety of important information starting at downloading options and ending with detailed code description. List of all available tools can be found here.

Usage

All examples contain necessary files for code compilation and running the case except those, that can be easily recreated using genbox or genmap. Moreover, to reduce a number of binary files in the repository, we do not include multiple copies of the same file, so e.g. ext_cyl.re2 exists only under ext_cyl_DNS and it has to be copied to ext_cyl_LIN or ext_cyl_SFD.

Each example consists of:

required tools source and include files
setup source file ###.usr
required SIZE file containing definitions of static arrays dimensions
compilation script compile_script
makefile_usr.inc describing compilation rules for tools files
runtime parameters file ###.par
mesh description; it can be ###.box or ###.re2
README.md listing all the tools

To compile the code:

make sure compile_script has set execute bit (chmode u+x compile_script)
edit compile_script to set proper compilers
clean directory ./compile_script --clean (with the first compilation on a given machine clean the libraries as well)
build the code ./compile_script --all

To run the code:

regenerate the mesh using genbox if ###.re2 is not present
generate map file using genmap
execute the code using scripts from Nek5000/bin/ directory

Example list

ext_cyl_DNS - nonlinear simulation of the flow past circular cylinder
ext_cyl_LIN - linear simulation of the flow past circular cylinder
ext_cyl_SFD - nonlinear simulation of the flow past circular cylinder with Selective Frequency Damping to calculate base flow
ext_cyl_ARN - linear stability tool for spectra calculation with Arnoldi algorithm
ext_cyl_PWI - linear stability tool, power iteration
phill_STAT - nonlinear simulation of flow over periodic hill to calculate turbulence statistics
phill_PSTAT - postprocessing of files produced by phill_STAT
phill_TRIP - nonlinear simulation of flow over periodic hill with tripping line

Simkern/KTH_Examples

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