Grid2Grid

General Description

• A wrapper program for generating the nonlinear waves in flow solver.
• The nonlinear waves are pre-computed by Higher-Order Spectral (HOS) Method.
• Developed by LHEEA, Ecole Centrale de Nantes(ECN).

• The following flow information can be retrieved:

  • Wave Elevation
  • Fluid Velocity
  • Dynamic Pressure

How to Install?

Third party libraries

• FFTW3
• HDF5

Install FFTW3 library

Download source code

1. FFTW3 source code can be downloaded from http://www.fftw.org/download.html.

Unzip

1. Unzip the folder in Windows

Compilation

In Windows (PowerShell)

1. Configure the CMake Project

   cmake -G <GENERATOR_NAME> -A <OS_ENV> -B <BUILD_DIR_PATH> -S <CMAKE_PROJECT_DIR>

   • : Generator (For example “Visual Studio 14"”)
   • : Win32 or x64
   • : Directory to build (For example “build”)
   • : CMake Project Directory (For example “.”)

2. Compile

   cmake --build <BUILD_DIR_PATH> --target ALL_BUILD --config <BUILD_MODE>

   • BUILD_MODE: Release or Debug

   For example (In x64 Environment, Release mode)

   cmake -A x64 -B "build64" -S.
   cmake --build build64 --target ALL_BUILD --config Release

   Then, the compiled libraries can be found as:

   

In Linux (Shell, tested in Ubuntu 18.04.4 LTS)

1. Configure the FFTW library

   ./configure --prefix=/DOWNLOAD_PATH

2. Compile the library

   make CFLAGS="-fPIC"
   make install

   Then, the library can be found in “lib/”

Install HDF5 library

It requires HDF5 third party library (version >= 1.8.16). You can:

• either download HDF5 library from https://support.hdfgroup.org/HDF5/

• or install package libhdf5-dev on Ubuntu 16.04.1

In Windows (PowerShell)

• On-going (We are sorry!)

In Linux (Shell, tested in Ubuntu 18.04.4 LTS)

1. Download HDF5 library (Cmake, Unix) and extract source code https://support.hdfgroup.org/HDF5/release/cmakebuild.html

2. Add following lines in a file "HDF5options.cmake"

   #set(ADD_BUILD_OPTIONS "${ADD_BUILD_OPTIONS} -DHDF5_NO_PACKAGES:BOOL=ON")
      ### Create install package with external libraries (szip, zlib)
   
      set(ADD_BUILD_OPTIONS "${ADD_BUILD_OPTIONS} -DHDF5_PACKAGE_EXTLIBS:BOOL=ON")
      set(ADD_BUILD_OPTIONS "${ADD_BUILD_OPTIONS} -DHDF5_BUILD_FORTRAN:BOOL=ON")
      set(ADD_BUILD_OPTIONS "${ADD_BUILD_OPTIONS} -DBUILD_SHARED_LIBS:BOOL=ON")
      set(ADD_BUILD_OPTIONS "${ADD_BUILD_OPTIONS} -DHDF5_BUILD_CPP_LIB:BOOL=ON")

3. Compile with the following command

   ctest -S HDF5config.cmake,BUILD_GENERATOR=Unix -C Release -V -O hdf5.log

4. Check the library exists in a following path

   ls build/bin/libhdf5.a build/bin/libhdf5_fortran.a build/bin/libszip.a build/bin/libz.a

5. Make soft link (Optional)

   ln -s ..../Cmake-hdf5-x /usr/local/lib/hdf5

6. Set HDF5_Library path in a "CMakeLists.txt" in Grid2Grid

   set(HDF5_LIB_PATH /usr/local/lib/hdf5/build/bin)

Install Grid2Grid

From version Grid2Grid version 2, CMake is used to compile the Grid2Grid library.

1. Set library dependency and paths for Grid2Grid (Grid2GridOptions.cmake)

   ###... Fortran Compiler
   set(CMAKE_Fortran_COMPILER gfortran)
   
   ###... FFTW3 Library Path
   ### set(FFTW3_LIB_PATH  /home/yomy/Utility/fftw/fftw-3.3.8_GNU/lib)
   ### set(FFTW3_LIB_PATH  C:/Users/YOUNGCHOI/Choi/fftw-3.3.8/build64/Release)
   set(FFTW3_LIB_PATH  $FFTW3_LIB_PATH)
   
   ###... HDF5 Library Path
   ### set(HDF5_LIB_PATH  $HDF5_LIB_PATH)
   ### set(HDF_LIBRARY "ON")
   
   ###... Set Library Output path to be OpenFOAM Path
   ### set(BUILD_OF_LIB "ON")

2. Configure and Compile Grid2Grid Project

   In Windows (PowerShell), (For example: x64, Release Mode)

   cmake -S. -Bbuild -A x64 
   cmake --build build --target ALL_BUILD --config Release

   In Linux (Shell, tested in Ubuntu 18.04.4 LTS)

   cmake -H. -Bbuild
   cmake --build build