Week 6: Shock tube simulation project

Shock Tube Simulation

Objective:

• To Setup a transient shock tube simulation
• To Plot the pressure and temperature history in the entire domain - Explain the result
• To Plot the cell count as a function of time - Explain the result

Geometry:

The given geometry was imported into the Converge

Case setup:

Case setup:

Application Type:-

• Time based

Material:-

• Gas simulation
• Global transport parameters
  1.Turbulent Prandtl number - 0.9
  2.Turbulent schmidt number - 0.78
• Species
  1.N2
  2.O2

Simulation Parameters:-

• Run Parameters
  1.Solver - Transient
  2.Temporal type - Time based simulation
  3.Simulation mode - Full hydrodynamic
  4.Gas flow solver - Compressible
• Simulation Time Parameters:
  1.Start time - 0s
  2.End time - 0.01s
  3.Initial time step - 1e-7s
  4.Minimum time step - 1e-7 s
  5.Maximum time step - 1 s.
• Solver Parameters:
  1.Navier stokes solver scheme - PISO
  2.Navier stokes solver type - Density based
• Boundary Conditions :
  1.Inlet - Inflow
  Velocity -30m/s
  Species - N2 and O2.
  2.Outlet - Outflow
  Pressure - 101325 pa
  Species - N2 and o2
  3.Top & Bottom - Symmetry
  4.Front 2D - Two_D
  5.Back 2D - Two _D
  6.Aerofoil wall - wall
• Initial conditions and events:
  1.Initial pressure - 101325 pa
  2.Initial Velocity - 30m/s
  3.Initial Temperature - 300K
  4.Species - Air
  Events:
  Sequential - Event (Open and close)
• Physical Models:
  1.Turbulence modelling - RNG-K-epsilon
• Grid control:
  1.Base Grid - (x-0.003m) (y-0.003m) (z-0.003m)
• Time interval for writing 3D output files- 0.001s
• Time interval for writing text output - 0.001 s
• Time interval for restarting output files - 0.001s

Results :

1.Pressure Animation:

2.Velocity Animation:

Conclusion:

Shock tube simulation was done successfully.