unsteady
關注創建者：悟空_7905 創建時間：2021-02-27
unsteady的實例教程
SIMULATION -------------------------------%
%
% Unsteady simulation (NO, TIME_STEPPING, DUAL_TIME_STEPPING-1ST_ORDER,
% DUAL_TIME_STEPPING-2ND_ORDER, TIME_SPECTRAL)
%UNSTEADY_SIMULATION= NO
UNSTEADY_SIMULATION= DUAL_TIME_STEPPING-2ND_ORDER
%
% Time Step for dual time stepping simulations (s)
% U_inf = 425 - L=4.5E-2 dt=0.002 -
UNST_TIMESTEP= 2.12E-7
%
% Total Physical Time for dual time stepping simulations (s)
UNST_TIME= 1.06E-2
%
% Unsteady Courant-Friedrichs-Lewy number of the finest grid
UNST_CFL_NUMBER= 0.0
%
% Number of internal iterations (dual time method)
UNST_INT_ITER= 30
%
% Iteration number to begin unsteady restarts
UNST_RESTART_ITER= 2
% -------------------- BOUNDARY CONDITION DEFINITION --------------------------%
%
% Navier-Stokes wall boundary marker
展開 |
| SIMULATION |
| -------------------------------% |
| |
| \% |
| |
| \% Unsteady simulation (NO, TIME_STEPPING, |
| DUAL_TIME_STEPPING-1ST_ORDER, |
| |
| \% DUAL_TIME_STEPPING-2ND_ORDER, TIME_SPECTRAL) |
| |
| \%UNSTEADY_SIMULATION= NO |
| |
| UNSTEADY_SIMULATION= DUAL_TIME_STEPPING-2ND_ORDER |
| |
| \% |
| |
| \% Time Step for dual time stepping simulations (s) |
| |
| \% U_inf = 425 - L=4.5E-2 dt=0.002 - |
| |
| UNST_TIMESTEP= 2.12E-7 |
| |
| \% |
| |
| \% Total Physical Time for dual time stepping simulations (s) |
| |
| UNST_TIME= 1.06E-2 |
| |
| \% |
| |
| \% Unsteady Courant-Friedrichs-Lewy number of the finest grid |
| |
| UNST_CFL_NUMBER= 0.0 |
| |
| \% |
| |
| \% Number of internal iterations (dual time method) |
| |
| UNST_INT_ITER= 30 |
| |
| \% |
| |
| \% Iteration number to
展開 |
| SIMULATION |
| -------------------------------% |
| |
| \% |
| |
| \% Unsteady simulation (NO, TIME_STEPPING, |
| DUAL_TIME_STEPPING-1ST_ORDER, |
| |
| \% DUAL_TIME_STEPPING-2ND_ORDER, TIME_SPECTRAL) |
| |
| \%UNSTEADY_SIMULATION= NO |
| |
| UNSTEADY_SIMULATION= DUAL_TIME_STEPPING-2ND_ORDER |
| |
| \% |
| |
| \% Time Step for dual time stepping simulations (s) |
| |
| \% U_inf = 425 - L=4.5E-2 dt=0.002 - |
| |
| UNST_TIMESTEP= 2.12E-7 |
| |
| \% |
| |
| \% Total Physical Time for dual time stepping simulations (s) |
| |
| UNST_TIME= 1.06E-2 |
| |
| \% |
| |
| \% Unsteady Courant-Friedrichs-Lewy number of the finest grid |
| |
| UNST_CFL_NUMBER= 0.0 |
| |
| \% |
| |
| \% Number of internal iterations (dual time method) |
| |
| UNST_INT_ITER= 30 |
| |
| \% |
| |
| \% Iteration number to
展開 非穩態切削例子（cae文件），另外附上例題集3切削的兩例題的碩士論文，
熱切削加工熱力耦合建模及其試驗研究
unsteady cutting100.jpg
切削加工熱力耦合建模及其試驗研究.part01.rar
切削加工熱力耦合建模及其試驗研究.part02.rar
切削加工熱力耦合建模及其試驗研究.part03.rar
unsteady_cutting.rar
combustion-tutorial-list_13.0.pdf
tut-01-intro-tut-16-Modeling Species Transport and Gaseous Combustion.pdf
tut-02-intro-tut-17-Using the Non-Premixed Combustion Model.pdf
tut-03-intro-tut-18-Modeling Surface Chemistry.pdf
tut-04-intro-tut-19-Modeling Evaporating Liquid Spray.pdf
tut-05-2D Simulation of a 300 KW BERL Combustor Using the Magnussen Model.pdf
tut-06-Premixed Flow in a Conical Chamber using the Finite-Rate Chemistry Model.pdf
tut-07-PDF Transport Simulation of Sandia Flame.pdf
tut-08-Modeling Liquid Reactions in CIJR Using the Unsteady Laminar Flamelet Model.pdf
tut-09-Simulation of a Piloted Jet Flame using Unsteady Laminar Flamelet Model.pdf
展開 
unsteady的相關專題、標簽、搜索
unsteady的最新內容
Unsteady flow simulation of the Ahmed reference body using a lattice Boltzmann approach.
DPM|04邊界條件及后處理9個月前
Model”對話框中的“Contour Plots for DPM Variables”選項包含用于啟用單元平均離散相變量進行后處理的選項
通過各網格的粒子的平均值和RMS值
粒子變量的時間統計
激活“Data sampling for Time Statistics”選項，以啟用在非穩態計算期間對數據進行采樣的功能
在后處理或報告對話框中選擇“Unsteady
DPM|02粒子追蹤設置9個月前
Number of Steps, Step Length Factor 或 Length Scale
非定常粒子追蹤與穩態流動
在"Particle Treatment"選項下選擇"unsteady tracking of particles"功能，以啟用顆粒物的非穩態追蹤
指定DPM Iteration Interval，粒子相互作用的計算頻率，每N步計算一次粒子相互作用
通過穩態（steady）或瞬態（unsteady）的計算方法，可以獲得以下結果。
· 溫度分布：計算完成后，在 Particleworks 中查看齒輪箱壁面以及流體域內的溫度分布情況。可以通過云圖、等值線圖等可視化方式直觀地觀察溫度在不同位置的高低變化，分析哪些部位溫度較高，哪些部位溫度較低，從而確定可能存在散熱問題的區域。
使用準穩態葉素理論（Unsteady Blade Element Theory）預測法估算出能夠產生足夠升力且適合的拍動幅度為150°，驅動頻率為37 Hz。考慮到曲柄滑塊機構是非對稱機構，其在前進和返回行程之間有不同的速度，因此在第一級輸出端添加了一組桿交叉機構，減少了曲柄滑塊機構的不對稱特性并放大了輸出幅值，如圖7（a）所示。
要定義求解器參數，請按以下步驟操作：
選擇
Solvers > Implicit Unsteady節點，將Time-Step設置為0.01 s。
本課題組利用非定常離散粒子模型(unsteady discrete particle model)對150 萬顆Rosin-Rammler 分布的粉末顆粒進行軌跡追蹤。
選擇模型樹節點
Regions > Rotating > Physics Values > Motion Specification，指定
Motion為
Rotation
選中
Solvers > Implicit Unsteady，指定
Time Step為
8.3333e-5 s
30
1/6000 s
Inner Rotor
11
32.73°
100.90909RPM
0.005
30
1/6000 s
選中模型樹節點
Solvers > Implicit Unsteady
回到Models界面，雙擊 Discrete Phase，彈出如下界面
勾選Interaction with Continuous Phase，考慮離散相軌跡對連續相的影響
DPM Iteration Interval：輸入10
在Contour Plots for DPM Variables欄勾選Mean Values，后處理界面使用平均值顯示
勾選Unsteady Particle
