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オープンCAEコンサルタント
OCSE^2 代表 野村悦治
2015/1/16 オープンCAE勉強会@関西
 
1
bubbleColumn Variations
in OpenFOAM-3.0.0/tutorials
動機
2
tutorials/multiphase/..bubble...
3
4
U.air=0.1, U.water=0 m/s
alpha.air=0.5, T.air=300K
alpha.water=0.5, T.water=350K
points: 3952
cells: 1875
( 25 x 75 )
1.0
0.15
0.1
air
alpha.air=1
alpha.water=0
T.air=300K
water
alpha.air=0
alpha.water=1
T.water=350K
bubbleColumn Variations
5
twoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
RAS
bubbleColumn
LES
bubbleColumn
reactingTwoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
bubbleColumnEvapolating
bubbleColumnEvapolatingDissolving
RAS
bubbleColumn
bubbleColumnEvapolatingReacting
LES
bubbleColumn
multiPhaseEulerFoam
bubbleColumn
reactingMultiPhaseEulerFoam
laminar
bubbleColumn
bubbleColumn Variations
6
twoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
RAS
bubbleColumn
LES
bubbleColumn
reactingTwoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
bubbleColumnEvapolating
bubbleColumnEvapolatingDissolving
RAS
bubbleColumn
bubbleColumnEvapolatingReacting
LES
bubbleColumn
multiPhaseEulerFoam
bubbleColumn
reactingMultiPhaseEulerFoam
laminar
bubbleColumn
twoPhaseEulerFoam
7
1,2051,0951,2301,150ExecutionTime
8
http://bit.ly/1Ow415U
case毎に内容調査・比較
9
fields
10
IATE 固有の変数
乱流関連変数
fields
11
12
IATE 関連
モデルパラメタ
g
phaseProperties
13
residualAlpha
の指定の有無
(実質的な違いは
なさそう)
phaseProperties
14
thermophysicalProperties.air / water
15
全て同一
thermophysicalProperties.air / water
16
乱流モデルに応じたパラメタ記述
turbulenceProperties.air / water
17
使用するField変数の違いに応じて
divSchems が追加されている
fvSchemes
18
fvSolution
19
使用するField変数
の違いに応じて項
目名が追加されて
いる
tolerance が
ケースに応じて微妙に異
なってはいるが
実質的な違いはなさそう
乱流計算に必要
fvSolution
20
IATE
(Interfacial Area Transport Equation) bubble diameter model.
bubbleColumnIATE
21
まとめ1
22
twoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
RAS
bubbleColumn
LES
bubbleColumn
reactingTwoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
bubbleColumnEvapolating
bubbleColumnEvapolatingDissolving
RAS
bubbleColumn
bubbleColumnEvapolatingReacting
LES
bubbleColumn
multiPhaseEulerFoam
bubbleColumn
reactingMultiPhaseEulerFoam
laminar
bubbleColumn
基本
粒径モデルをIATEに
(他は一定値)
乱流モデルをRASに
乱流モデルをLESに
(但し、メッシュは同一
なので、結果の比較は
意味なし)
reactingSolver w/o reacting
23
twoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
RAS
bubbleColumn
LES
bubbleColumn
reactingTwoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
bubbleColumnEvapolating
bubbleColumnEvapolatingDissolving
RAS
bubbleColumn
bubbleColumnEvapolatingReacting
LES
bubbleColumn
multiPhaseEulerFoam
bubbleColumn
reactingMultiPhaseEulerFoam
laminar
bubbleColumn
1,223
1,230
1,150
1,205
1,095
1,362
1,282
589
計算が途中で
異常終了
24
fields
結果出力の有無
他のケースも同様
25
phaseProperties
twoPhaseEulerFoam で
はtype指定パラメタが無
かったが、reactingTwo...
では必要
表面張力パラメタが、
sigmaから
surfaceTensionに変
わった
まとめ2
26
twoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
RAS
bubbleColumn
LES
bubbleColumn
reactingTwoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
bubbleColumnEvapolating
bubbleColumnEvapolatingDissolving
RAS
bubbleColumn
bubbleColumnEvapolatingReacting
LES
bubbleColumn
multiPhaseEulerFoam
bubbleColumn
reactingMultiPhaseEulerFoam
laminar
bubbleColumn
1,223
1,230
1,150
1,205
1,095
1,362
1,282
589
計算が途中で
異常終了
twoPhaseEulerFoamのcaseと同等問題を
reactingTwoPhaseEulerFoamを用いて計算
できるようにしたもの
(計算時間は少々増加する)
laminar Variations
27
twoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
RAS
bubbleColumn
LES
bubbleColumn
reactingTwoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
bubbleColumnEvapolating
bubbleColumnEvapolatingDissolving
RAS
bubbleColumn
bubbleColumnEvapolatingReacting
LES
bubbleColumn
multiPhaseEulerFoam
bubbleColumn
reactingMultiPhaseEulerFoam
laminar
bubbleColumn
基本
28
1,095ExecutionTime 1,223 6,728 8,340
気中での反応を計
算する為
気中領域を大きく
とってある
29
fields
30
phaseProperties
詳細はデータシート参照
typeに応じて、いくつかパ
ラメタが変更されている
31
蒸発を考慮した結
果、気中での温度
拡散が良くなった気中での温度がほとんど
上昇していない
32
reacting Variations
33
twoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
RAS
bubbleColumn
LES
bubbleColumn
reactingTwoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
bubbleColumnEvapolating
bubbleColumnEvapolatingDissolving
RAS
bubbleColumn
bubbleColumnEvapolatingReacting
LES
bubbleColumn
multiPhaseEulerFoam
bubbleColumn
reactingMultiPhaseEulerFoam
laminar
bubbleColumn
34
ExecutionTime 26,891
35
fields
36
phaseProperties
37
38
reaction.gas
39
thermo.gas
まとめ3
40
twoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
RAS
bubbleColumn
LES
bubbleColumn
reactingTwoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
bubbleColumnEvapolating
bubbleColumnEvapolatingDissolving
RAS
bubbleColumn
bubbleColumnEvapolatingReacting
LES
bubbleColumn
multiPhaseEulerFoam
bubbleColumn
reactingMultiPhaseEulerFoam
laminar
bubbleColumn
蒸発を考慮
(水→水蒸気)
蒸発&凝縮を考慮
(水←→水蒸気)
化学種反応を考慮
multiphase
41
twoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
RAS
bubbleColumn
LES
bubbleColumn
reactingTwoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
bubbleColumnEvapolating
bubbleColumnEvapolatingDissolving
RAS
bubbleColumn
bubbleColumnEvapolatingReacting
LES
bubbleColumn
multiPhaseEulerFoam
bubbleColumn
reactingMultiPhaseEulerFoam
laminar
bubbleColumn
42
432 1,242 1,093ExecutionTime
43
44
reactingMulti..と、
reactingTwoPhase...
の違いは、type名が違っ
ているだけ
45
物性の定義ファイルが異
なっている
multiphaseEulerFoamは
非圧縮モデル?
まとめ4
46
twoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
RAS
bubbleColumn
LES
bubbleColumn
reactingTwoPhaseEulerFoam
laminar
bubbleColumn
bubbleColumnIATE
bubbleColumnEvapolating
bubbleColumnEvapolatingDissolving
RAS
bubbleColumn
bubbleColumnEvapolatingReacting
LES
bubbleColumn
multiPhaseEulerFoam
bubbleColumn
reactingMultiPhaseEulerFoam
laminar
bubbleColumn
非圧縮性問題
圧縮性問題
多相流ソルバにて
2相流問題を解い
ている(計算時間
は少々増加)
Let’s smart OpenCAE
presented by47

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