Overview

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THOR

A Flexible Global Circulation Model to Explore Planetary Atmospheres

THOR is a GCM that solves the three-dimensional non-hydrostatic Euler equations on an icosahedral grid. THOR was designed to run on Graphics Processing Units (GPUs).

If you use this code please cite: Mendonca, J.M., Grimm, S.L., Grosheintz, L., & Heng, K., ApJ, 829, 115, 2016

BUILD & RUN THOR

Main instructions to compile and run THOR. This version uses only a single GPU.

Current code owner: Joao Mendonca: joao.mendonca@space.dtu.dk

Home website: http://software-oasis.com/

INSTALL

UBUNTU 17.04

1- Install cuda.

   $ sudo apt install nvidia-cuda-toolkit

2- Downgrade g++ because cuda 8 conflicts with the latest g++.

   $ sudo apt install g++-5

3- Restart your pc.

4- Install hdf5 (https://support.hdfgroup.org/HDF5/release/obtainsrc.html). Download the source code. Follow all the steps from the instructions, for example:

   $ cd <install_directory>

   $ mkdir build

   $ cd build

   $ sudo /path_to_HDF5_source/configure

   $ sudo make

   $ sudo make check

   $ sudo make install

   $ sudo apt install hdf5-helpers

5- Go to THOR home directory. Open Makefile file and set "hdf_install" and "h5lib" paths correctly.

6- Set the value SM correctly, this depends on the GPU you are using. SM stands for Streaming Multiprocessor and the number indicates the features supported by the architecture. See https://developer.nvidia.com/cuda-gpus. Example: Tesla K20 -> 35. To get information on your GPU, type in the terminal:

   $ nvidia-smi 

7- Create a config file in "/etc/ld.so.config.d" called for example "mylib.conf" with the following line:

/path_to_hdf5_libs

Run:

   $ sudo ldconfig 

8- Type:

   $ make -j8

RUN

UBUNTU 17.04

0- (First run?) Create two folders called "obj" and "results".

   $ mkdir obj results

1- Set planet's parameters in "src/initial/planet.cu".

2- Set model's parameter in "src/headers/define.h".

3- Run

   $ ./bin/esp

4- Press enter. The code will run for the number of steps defined in: define.h.

Results

  • Output is written in "results" folder.
  • Very useful command lines to quickly explore the hdf5 files can be found in support.hdfgroup.org/HDFS/Tutor/cmdtools.html or type the command ">> man h5dump".
  • You can find some Matlab routines to explore the results in "mjolnir" folder.