Steady state simulation of flow over a throttle body

Objective:

To conduct steady state simulation of flow over a throttle body.

Theory:

Case setup:

Inlet pressure = 150000 Pa

Outlet Presure = 100000 Pa

Inlet temperature = 300K

Outlet temperature = 300K

No of cycles = 15000

Min time step = 1e-9

Max time step = 1

Base grid size = 0.002m

Fixed embedding scale = 3

Geometry:

Mesh:

The base mesh of 2mm is used for entire body. The mesh for throttle valve is refined.

Velocity Contour:

The velocity contour is cut along plane normal to z axis. Above represents the trend of velocity at inlet and outlet. The maximum velocity can be observed at the gap between throttle and elbow of pipe.

Pressure Contour:

The pressure contour is cut along plane normal to z axis. Above represents the trend of pressure along the length of pipe.

Cell Count:

From the above we can conclude that no of cells are 42000.

Mass flow rate:

Above represents the trend of mass flow rate at inlet and outlet.

Below is the link for animation of simulation