Numerical Simulation of Residual Oil Flooded by Polymer Solution in Microchannels

Table 3

The change of advancing and receding contact angle (initial wetting angle).

Wetting angle	Initial wetting angle θ (°)
	30	45	60
Advancing angle change θa (°)	74.33	64.43	67.98
Receding angle change θr (°)	14.64	13.58	32.94