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2016 01 bubble_column

bubbleColumn Variations in OpenFOAM-3.0.0 / tutorials

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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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2016 01 bubble_column