Channel Flow Simulation using CONVERGE CFD
Project Objectives:
(1) To simulate the air flow through a channel using CONVERGE Studio and post-process using ParaView.
(2) To conduct a grid independent test and study the Velocity and Pressure contour.
Mesh sizes:
X-direction -
- 2e-4 m
- 1.5e-4 m
- 1e-4 m
Mesh along Y and Z direction is kept the same for all cases.
Y-direction -
- 1e-4 m
Z-direction -
- 1e-4 m
Fixed embedding tool is enabled at the boundaries so that a finer mesh is provided there. It is enabled after 5000 timesteps. Grid scaling factor is also enabled.
Initial and Boundary conditions:
- Pressure at inlet = 100001 Pa
- Pressure at outlet = 100000 Pa
- No slip condition at top and bottom wall
Base Mesh:
(1) 2e-4
After grid scaling, the mesh is refined.
(2) 1.5e-4
After grid scaling, the mesh is refined.
(3) 1e-4
After grid scaling, the mesh is refined.
Velocity and Pressure contour:
(1) 2e-4
(2) 1.5e-4
(3) 1e-4
Velocity Plots:
(1) 2e-4 -
(2) 1.5e-4
(3) 1e-4
Mass flow rate:
(1) 2e-4
(2) 1.5e-4
(3) 1e-4
Cell count:
(1) 2e-4
(2) 1.5e-4
(3) 1e-4
Conclusion:
- As the base grid size is decreased, it can be seen that the total cell count is increased.
- The results of velocity and pressure contour obtained using finer mesh are more clear than that obtained by coarser mesh. Finer mesh gives a smoother velocity plot.
- The plot for mass flow rate in all the three cases shows that inlet and outlet flow rate are mirror images of each other. This ensures that the mass is conserved in the flow domain.