a new title
*********** Comments by Grader ************
You should also be showing the velocity graph and explain about the paraboilc profile.
Why we get parabolic profile and what it indicates.
Also you should explain all the graphs.
Marks here are deducted for the above mentioned reasons.
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If you have any doubts please ask us on WATS APP or raise a ticket on FRESHDESK or even you can call us clarify all your doubts.
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Channel Flow Simulation
Challenge under the course Advanced CFD for IC Engine Applications-Skill Lync
Submitted by: D. Sai Kamal
Software’s used: CONVERGE v2.3, Paraview
Geometry:
Setup:
Initial Conditions being Temperature of 300K and atmospheric pressure of 101325 Pa with air (O2 and N2) as species with default mass fractions. Inflow pressure of 100001.0 Pa and pressure at outlet of 90000.0 Pa
Time Step Info for all cases:
End Time | 20000 cyc |
0.0001 | dtstart |
1e-008 | dt |
1.0 | dt_max |
1e-006 | dt_min |
Case 1:
Grid Size: 1.5e-03 (0.0015 m) with fixed embedding and no grid scaling. Simulating 1.5e-4 was not supported by PC using 4 processors used.
Total Cells: 1053
Figure 1 Pressure Profile for Case 1
Figure 2 Velocity Profile for Case 1
Figure 3 Temperature Profile for Case 1
If observed the results obtained mainly tell where the majority of the velocity, pressure and temperatures values are present. Minor details are missing as the simulation seems more pixelated as the mesh size is little large for the given geometry. For approximations it is fine but for more detail the mesh size can be increased.
Case 2:
Grid Size: 2e-04 (0.0002 m) with fixed embedding and grid scaling
Total Cells: 29053
Figure 4 Total Cells of 29053
Figure 5 A good size of meshing with fixed embedding
Figure 6 Pressure Profile for Case 2
Figure 7 Velocity Profile for Case 2
A clear indication of wall shears near top and bottom walls cause low velocity in a minimal area whereas majority of velocity value at the centre remains the same.
Figure 8 Viscosity Profile for Case 2
Flow through a channel follows Poiseuille’s Law i.e. the force opposing motion is inversely proportional to the length of the pipe and as observed in the Figure 8, as the flow reaches the outlet, the viscous force is gradually increasing.
Case 3:
Grid Size: 1.2e-04 (0.00012 m) with fixed embedding
Total Cells: 75060
Figure 9 A very good meshing with detailing at the walls
Figure 10 Total Simulation Time being above 1hr due to fine mesh
Figure 11 Pressure profile for Case 3
Figure 12 Velocity Profile for Case 3
Figure 13 Temperature Profile for Case 3