Week 4.2: Project - Transient simulation of flow over a throttle body

Aim --> Transient simulation of flow over a throttle body with Converge CFD.

Objectives -->

• Post-process the results and show pressure and velocity contours.
• Show the mesh.
• Show the plots for pressure, velocity, mass flow rate and total cell count.
• Create animations for throttle movement.

Geometry -->

Case Setup -->

• Case setup tree -->
• 
• Application type --> Time-based
• Material --> Air
• Gas simulation parameters
• 
• Simulation Parameters (Run and solver parameters)
• 
• angle.in file
• 
• Simulation time parameters (End time = 0.1 seconds)
• 
• Boundary (Pressure Inlet Outlet boundary condition)
• 
• 
• Base mesh and fixed embedding
• 
• Regions and Initialization
• 
• Turbulence model --> RNG K-e model
• 
• Output files
• 

Results

• Mesh

Mesh-Motion Animation (Throttle body rotation motion)

--> We can see that after 0.002 seconds Mesh(Total_cells) remains constant.

• Mass-flow rate plots at inlet and outlet

• Velocity plots/contours

Velocity plots

Velocity Animation

Velocity streamline

• Pressure plots/contours

Pressure Animation

• Turbulent Kinetic Energy and Epsilon(dissipation rate)

• Temperature and Density

Conclusion

• Transient simulation on throttle valve has been successfully run for 0.1 seconds.
• flow variables have converged in the plots.
• Flow separation, recirculation and wake region near throttle body is shown in the contour plots.