Project Transient simulation of flow over a throttle body

Project Transient simulation of flow over a throttle body

1. Geometry

DIMENSIONS X= 0.106314 m

Y= 0.119998m

Z= 0.0171742m

1. BOUNDARIES

• Inlet
• Outlet
• Throttle body
• Boundary walls

1. Case Setup

Boundary conditions

SR.	BOUNDRY	TYPE	PRESSURE	SPECIES
1	INLET	INFLOW	150000 Pa	AIR
2	OUTLET	OUTFLOW	100000 Pa	AIR
3	THROTTLE	Moving WALL	-	-
4	WALL	WALL	-	-

Throttle conditions

0.00 - 0deg

0.002- 25deg

0.004 - 25deg

0.008 - 0deg

Solver

Pressure based steady state solver

Base GRID SIZE

dx =dy=dz=0.004

Fixed embedding is used for boundary Id – Throttle, with scale of 3 and embed layers 2 . Permanent mode was selected

fig1. Velocity contour

fig2. Mesh

fig3. Pressure contour

Plot 1. Mass flow rate

Plot 2. Cell count

Plot 3. Pressure

Plot 4. Velocity

Observations

1) Restriction of the throttle produces areas of low velocity and with the closing of throttle the areas of lower velocity increase.

2) Fixed embedding around the throttle body increased the cell count

3) There was an increase in cell count with the movement of throttle