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Experimental
Setup
Experiments
were conducted in a pseudo-two dimensional (2D) polyacrylate container shown in
Figure 1 below. The container was 0.2 m high, 0.15 m wide and 0.0045 m deep;
see Figure 2 below. It was filled with polystyrene beads to a height of 0.06 m.
The polystyrene beads had an average diameter of approximately 0.85 mm and a
density of 1080 kg/m3.
The
2D polyacrylate container was mounted on an air-cooled vibration exciter (TIRAvib
5220, Germany) which was used to generate sine wave displacements; see
further details here. The vibration
exciter was coupled to a power amplifier. It can be operated within a frequency
range of 2 to 5000 Hz. Depending on the operating frequency, the amplitude of
the sinusoidal motion generated can be varied in the range of 0 to 12 mm. The
vibration system was fully automated and controlled from a PC using Signal Calc
550 Vibration Controller software (Data Physics Corporation, United States).
Figure
1. Experimental setup
Figure
2. Close-up on the granular bed
Next:
Photographs of the Setup
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