Transient simulation of flow over a Throttle body

Aim:

To simulate the transient flow over a throttle body.

Procedure:

1. The elbow with throttle is imported into converge studio with .stl extension.
2. The geometry is scaled and the bounday is flagged.
3. The normals are oriented towards inside and the diagnosis is done.
4. The case setup is done with transient based solver.

Case Setup:

• Solver = Transient
• Simulation Time Parameters:

As per the steady flow simulation the velocity is 200m/s

The length of the elbow is 0.11 m and approximated to 0.2 m

Using, Time = Displacement / Velocity

Time = 0.001 s

The simulation is run for 0.006 s

• Minimum time step: 1e-9 s
• Maximum time step: 1 s
• Base grid: 0.002 m
• Fixed Embedding

Scale = 3

Embedded layers = 2

Rotating degrees:

Total time for simulation: 0.006 s

Rotates to 25 degrees in 0.00225 s

Rotates back to 0 degrees in 0.00375 s

Observation:

Result:

The mesh generation over a rotating body is observed.

The obstruction in the flow and the pressure difference created due to throttle rotation is simulated.