XFlow 应用培训教程 (1)车辆

WS01 – Vehicle aerodynamics
5. Calculation: Post-processing
Post-processing: • Visualization field: Velocity • Visualization mode: Plane
vectors
• Arrow density • Arrow length • Cutting-plane Z
2. Materials: Air
Fluid:
• Air by default • Thermodynamic properties • Viscosity model: Newtonian
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WS01 – Vehicle aerodynamics
3. Geometry: Import the car
Resolution: • Resolved scale: 0.2m • Refinement: walls + wake • Wake resolution: 0.01m • Car resolution: 0.01m
Data storage: • Folder name • Frequency of samples:
50m/s
• Initialization pressure: 0 Pa
Wind tunnel: • Dimensions: (8,1.5,3) • Ground wall: On • Velocity laws: 50m/s
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WS01 – Vehicle aerodynamics
Message View: • Solver info • Post-processing info
Timeline: • Time control • Displays the selected frame • Calculation progression
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WS01 – Vehicle aerodynamics
5. Post-Processing: Monitor drag coefficient
Right-click
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WS01 – Vehicle aerodynamics
Open a new XFlow Project
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WS01 – Vehicle aerodynamics
1. Environment: Single phase external
Boundary Conditions: • Type: Wall • Automatic wall model
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WS01 – Vehicle aerodynamics
3. Geometry: Set the geometry
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WS01 – Vehicle aerodynamics
5. Run simulation
Run the calculation: • Hit button “Run”
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WS01 – Vehicle aerodynamics
Engine: • Dimension: 3D • Single phase external • Thermal model: Isothermal • Acoustic analysis: off Global attributes: • Automatic turbulence model • Wind-tunnel • No gravity laws • Initialization velocities:
Import geometry: • Hit the button • Browse the file
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WS01 – Vehicle aerodynamics
3. Geometry: Set the geometry
Behavior: • Fixed
[x] • Constrained [ ] • Forced [ ] • Position: (-1,-0.75,0)
5. Calculation: Post-processing
Aerodynamics: • Cx • Cy • Cz
Post-processing: • Visualization field: Velocity • Visualization mode:
Contours
• Cutting-plane Z
200Hz
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WS01 – Vehicle aerodynamics
4. Simulation: Set the numerical parameters
Calculation Folder: • Folder relative to the project folder OR • Folder specified by the user
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WS01 – Vehicle aerodynamics
5. Calculation: Post-processing
Volumetric field: • Field: Vorticity • Volumetric field: On • Transference law: a • Interpolation mode: Off
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WS01 – Vehicle aerodynamics
4. Simulation: Set the numerical parameters
Time discretization: • Simulation time: 0.15s • Automatic time step calculation • Courant number: 1
XFlow 应用培训教程 （1）
—— 车辆空气动力学分析
2012年12月21日 QQ群：200378871
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WS01 – Vehicle aerodynamics
Overview
• Automotive • Single phase • External aerodynamics • Static geometry • Graphical post-processing • Numerical post-processing