Environmental Engineering Reference
In-Depth Information
Fig. 5
Initial system configuration in the simulation, the fluid particles are painted in
blue
and
the boundary particles in
red
.
Black points
indicate the places where velocities and pressure values
were calculated
of the laboratory device. The image of the Venturi tube was reproduced in Blender
v2.76 as a .stl file. From the .stl file a new Venturi tube was created with particles in
DualSPHysics (Fig.
5
).
The fluid was represented by 558,078 particles with zero initial velocity. The
simulated time was 2 s, saving results each 0.01 s.
5 Results and Discussion
Numerical and experimental resultswere obtained and compared. The total simulation
time was 2.6h on a GeForce GTX 660M GPU card. Figure
6
shows the experimen-
tal and numerical results and the comparison of both. Numerical and experimental
(a)
(b)
(c)
4
4.0
4
3.5
3
3.0
3
2.5
2
2.0
2
1.5
Experiment 1
Experiment 2
Experiment 3
Experiment 4
Experiment 5
1
1.0
1
Experimental
Simulation
0.5
0
0.0
0
0
2
4
01234
01234
Dp (cm Hg)
Dif. press (cm Hg)
Dp (cm Hg)
Fig. 6 a
Experimental results obtained in the laboratory,
b
numerical results obtained from the
simulation, and
c
comparison of numerical and experimental results
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