====== Tutorial ======

動作確認済み：v8
===== Dam Break (Serial) =====

OpenFOAM実行用のディレクトリを作成．
<code>
mkdir -p $FOAM_RUN
</code>

<code>
$ run
$ cp -r $FOAM_TUTORIALS/multiphase/interFoam/laminar/damBreak/damBreak ./
$ cd damBreak
$ blockMesh
$ setFields
$ interFoam | tee log
$ paraFoam
</code>

Thirdpatryに付属するParaViewをビルドには時間がかかるため，あらかじめ用意したバイナリのParaViewで可視化できる．
ParaViewでは*.foamの形式でOpenFOAMの結果を読み込むことができる．
<code>
$ touch result.foam 
$ paraview result.foam
</code>

{{:openfoam:result_dam_break_serial.png?400 |}}

===== Dam Break (Parallel) =====

[[tutorial#Dam Break (Serial)|Dam Break (Serial)]]を並列実行用にコピーする．
<code>
$ foamCloneCase damBreak damBreakFine
</code>
[[tutorial#Dam Break (Serial)|Dam Break (Serial)]]で実行したモデルのメッシュ分割数を変更ため，system/blockMeshDictを以下のように編集．

<code>
blocks
(
    hex (0 1 5 4 12 13 17 16) (46 10 1) simpleGrading (1 1 1)
    hex (2 3 7 6 14 15 19 18) (40 10 1) simpleGrading (1 1 1)
    hex (4 5 9 8 16 17 21 20) (46 76 1) simpleGrading (1 2 1)
    hex (5 6 10 9 17 18 22 21) (4 76 1) simpleGrading (1 2 1)
    hex (6 7 11 10 18 19 23 22) (40 76 1) simpleGrading (1 2 1)
);
</code>

領域分割で割り当てられたプロセスを可視化するため，system/controlDictの末尾に以下を記述．

<code>
libs
(
    "libfieldFunctionObjects.so"
);

functions
{
    func
    {
        type processorField;
        outputControl outputTime;
        outputInterval 1;
    }
}
</code>
実行．
<code>
$ rm 0/alpha.water
$ blockMesh
$ setFields
$ decomposePar
$ mpirun -np 4 interFoam -parallel > log &
$ reconstructPar
</code>
結果を確認．
<code>
$ paraFoam
</code>

{{:openfoam:result_dam_break_parallel_procs.png?400 |}}
{{:openfoam:result_dam_break_parallel_water.png?400 |}}

===== Dam Break (Parallel and Scotch) =====

<code>
$ foamCloneCase damBreakFine/ damBreakFineScotch
</code>

system/decomposeParDictの領域分割方法を'scotch'に変更する．
<code>
- method          simple;
+ method          scotch;
</code>

残りの手順は[[tutorial#Dam Break (Parallel)|Dam Break (Parallel)]]と同様である．

{{:openfoam:result_dam_break_parallel_scotch_procs.png?400 |}}
{{:openfoam:result_dam_break_parallel_scotch_water.png?400 |}}