Fig. 7.
Asphaltene removal, at pore scale, by ultrasonic waves (20 kHz, 1000 W) at different sonication times for circle patterned micromodel C-1 (a) 0 mins (b) 1.5 mins (c) 2.75 mins (d) 3.75 mins (e) 5.75 mins (f) 120 mins.
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