Steady state simulation of flow over a Throttle body.
Objective:
- To setup a case for steady state flow simulation over a throttle valve when it is fully open and post process the results in paraview.
- Plotting the presuure, velocity, mass flow rate, total cell count for steady flow.
- Results of presuure of velocity contours using Paraview.
Geometry:
Geometry mesh:
A base grid size of 2e-3 was provided and also fixed embedded for the scale of 2 near the throttle and after post processing in paraview the slice looked like shown in the below contour.
Case setup :
Fluid used:- Air.
Solver :- Pressure-based steady solver
Start Time:- 0 cycle
End Time :- 15000 cycles
Initial and Minimum time steps :- 1e-09
Maximum time step :- 1
Turbulence modeling :- RNG k-ε
Inlet Pressure :- 1.5bar
Outlet Pressure :- 1bar
Elbow wall and Throttle wall Temperatures :- 300k (Law of wall)
velocity and pressure contours:
velocity:
The below shows the velocity contours which is cut along the z-axis and it is having the maximum velocity of 310 m/s shown at the side walls of the throttle wall and minimum pressure is recored behind the valve.
Pressure contour:
The below shown are the pressure contour in which the presuure shown at inlet is maximum at inlet over 1.5 bar and below the valve and at the outlet the total presuure is 0.7 bar .
Velocity plot:
The above shown is the velocity air at ilet and outlet conditions , in the inlet the velocity attains steady state around 3800 cycles or 4000 cycles and at the outlet its steady around 6000 cycles .
Pressure plot:
The above plot is of presuure in which the presuure at inlet at oulet attains the steady state around 5000 cycles .
Mass flow rate plot:
The above plot shows the mass flow rate of air at inlet and outlet , in the inlet steady is attained at 4000 cycles and at outlet its around 5000 cycles .
Total cell count:
The above plot shows the total cell count and the individual variation of cells used as 4 processors for the simulation.