Week 4: Project - Transient simulation of flow over a throttle body

AIM: To perform transient simulation of flow over a throttle body.

PROCEDURE:

• The throttle body geometry is imported and the boundary flagging is done.

• In transient case,the rotation centre and axis should be calculated for the throttle

and the profile is as follows:

From 0 to 2 ms the valve should rotate by 25 degrees

From 2 to 4ms it should stay at 25 degrees.

After which by 8ms the valve should get back to it’s original position.

• Once the boundaries are allotted then we proceed for the case setup.

Setup:

• Material - Air
• Species - N2 and O2
• Run parameters

• Simualtion parameters

• Grid size of 0.002m is used and for the sake of local refinement, embedding is also done to the geometry.

Results:

mesh

vector representation

velocity contour

pressure contour

velocity animation

pressure animation

Plots:

velocity

mass flow rate

total pressure

total cells

Conclusion:

• Transient settings were incorporated to the throttle body and the simulation was carried out successfully using converge and the above results were obtained.