Fig. 14 Comparison of single phase (water and hydrocarbon)
velocities between H-H and P-H nanopores of different widths. The
self-generated electric field in P-H pores and the imposed acceleration
dictate fluid transport in the center of the pore. For the same
acceleration, the fluid velocity profile is flat in P-H pores and
parabolic in H-H pores.
Fig. 15 shows the distribution of water in 5 nm P-H and H-H nanopores.
Hydrocarbon is not shown for clarity. During transport, a water bridge
persists in P-H pores as shown in Fig.15a. This is because of the
stronger electric field. Fig.12 also confirm the persistence of water
bridges in P-H pores irrespective of pore size. However, the water
bridge of the H-H nanopore breaks down as shown in Fig.15b. We can infer
that the strength of the hydrogen bond in the water bridge in the H-H
nanopore is weaker compared to the forces holding the water bridge
intact in the P-H nanopores.