Project Steady state simulation of flow over a throttle body

Project Steady state simulation of flow over a throttle body

1. Geometry

DIMENSIONS X= 0.106314 m

Y= 0.119998

Z= 0.0171742

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	WALL	-	-
4	WALL	WALL	-	-

Solver

Pressure based steady state solver

Base GRID SIZE

dx =dy=dz=0.002

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

Fig1. Mesh (surface with edges)

Fig2. Velocity Contour

Fig3. Pressure Contour

Fig4. Density Contour

Plot 1. Cell count

Plot2. Mass flow rate

l

Plot 3. Pressure

Plot 4. Velocity

It is a steady state flow problem , so no throttle body movement has been shown.

Observations

1) Due to restriction of the throttle , there are areas of low velocity around the throttle body where as there are areas of high velocity and low pressure just below the throttle body.

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

3) Velocity and pressure convergence was achieved around 6000 cycles