Challenge

Week 4.1: Project - Steady state simulation of flow over a throttle body

Week - 4

Steady state simulation of flow over a throttle body

Aim :

To perform a Steady state simulation of flow over a throttle body in Converge 3.0

Workflow in Converge:

Geometry:

Mesh :

Mesh is the process of Discretizing a large single geometry into number of elements.
More refined mesh gives more accurate and good results.
dx = dy = dz =2.0e-3m
Fixed embedding

Case Setup:

First we need to choose the Application type as Time based.
Choose the Material as Air.
After that leave the Gas simulation and Global transport equation as default.
Add the O2 and N2 in the species.
Under Simulation parameters choose the steady state solver and then provide the maximum and min time cycles.
Run Parameters:
Solver - Steady state
Simulation mode - Full hydrodynamic
Gas Flow Solver - Compressible.
Simulation time parameters:
Start time - 0 cycles
End time - 15000 cycles
Initial time step - 1e-6 s
Minimum time step - 1e-6 s
Maximum time step - 1 s
Maximum Convection CFL limit - 1
Solver Parameters:
Solver scheme - PISO
Solver type - Pressure based
Boundary conditions:
Inlet - Inflow (101325 pa and 300 K)
Outlet - Outflow (100000 pa)
Wall - Wall (No slip)
Throttle wall- Two-D
After assinging the boundary conditions we need to assign the regions for all the boundaries.

We need to create a region to initialize the setup.
The initial pressure and then the Inlet pressure should have to be same.
After that we need to select the RNG turbulence model.
Output/Post processing
In this part we need to choose the variable which we want to plot.

Solution:

After setting up the case in Converge, we have to save the setup file
Aftet that we have to export the input files.
After exporting the files we have to open CYWIN to perform the simulation.
In the CYGWIN, we need to choose the directory at where we exported the input files.
Then we have to copy and paste the location of intelmpiconverge.exe.

Results:

Mesh Image :