Gerris¶

简介¶

Gerris是求解描述流体流动的偏微分方程的开源软件。

Gerris基本使用¶

创建一个目录，并在该目录下编写如下vorticity.gfs文件：

1 2 GfsSimulation GfsBox GfsGEdge {} {
GfsTime { end = 50 }
GfsRefine 6
GfsInit {} {
  U = (0.5 - rand()/(double)RAND_MAX)
  V = (0.5 - rand()/(double)RAND_MAX)
}
GfsOutputTime            { istep = 10 } stdout
GfsOutputProjectionStats { istep = 10 } stdout
}
GfsBox {}
1 1 right
1 1 top

在该目录下编写如下gerristest.slurm运行脚本：

#!/bin/bash

#SBATCH -J test
#SBATCH -p small
#SBATCH -o %j.out
#SBATCH -e %j.err
#SBATCH -n 1
#SBATCH --cpus-per-task=1

IMAGE_PATH=/lustre/share/img/x86/gerris/gerris.sif
singularity exec  $IMAGE_PATH gerris2D vorticity.gfs

提交脚本：

sbatch gerristest.slurm

运行结束后可在.out文件中得到如下结果(部分)：

 step:       0 t:      0.00000000 dt:  1.888931e-02 cpu:      0.01000000 real:      0.01103200
Approximate projection
  niter:    3
  residual.bias:   -4.374e-18  2.233e-18
  residual.first:   3.751e-01  4.525e-05     20
  residual.second:  4.633e-01  6.034e-05     20
  residual.infty:   1.419e+00  4.128e-04     15
step:      10 t:      0.30436678 dt:  3.947231e-02 cpu:      0.18000000 real:      0.20647300
MAC projection        before     after       rate
  niter:    2
  residual.bias:    1.746e-19  9.098e-20
  residual.first:   2.313e-02  9.074e-05     16
  residual.second:  3.342e-02  1.171e-04     17
  residual.infty:   2.310e-01  5.609e-04     20
Approximate projection
  niter:    2
  residual.bias:   -5.667e-19  2.551e-19
  residual.first:   1.873e-02  5.536e-05     18
  residual.second:  2.423e-02  7.055e-05     19
  residual.infty:   1.063e-01  3.206e-04     18

参考资料¶

Gerris官网

最后更新: 2024 年 10 月 14 日