Experiments
We conducted two sets of experiments with the 4-arm setup. Set A of experiments involved allowing the fluid pressure in the inlet reservoirs to drop from predetermined level to zero and measuring the time required to achieve this pressure drop (Videos 2 and 3). A total of 48 different experiments were conducted under set A for various conditions as shown in Table 3. In general, shorter time required to achieve pressure drop indicates better drainage of fluid through the RPA-LPA pathway.
Set B of experiments involved maintaining the fluid pressure in the inlet reservoirs constant by replenishing the fluid continuously. The time required for flow of 1 liter of fluid each out of LPA and RPA at constant pressure was recorded. A total of 12 different experiments were conducted under set B for conditions as shown in Table 4. In general, less time required for flow of set volume of fluid (a total of 2 liters) indicates better drainage of fluid through RPA-LPA pathway.