Fig. 5: Acoustic streaming field for multi-focus fields.
From: Experimental and numerical study of acoustic streaming in mid-air phased arrays

Comparison of experimental (a–c) and simulated (d–f) multi-focus streaming velocity fields at ±10 mm (a, d), ±30 mm (b, e), and ±50 mm (c, f) along the z = 80 mm plane. Simulations assume 2D line symmetry under atmospheric conditions.