Experimental data for sedimenting rigid particles of certain shapes approaching a stationary orientation

Experimental data used in the manuscript "Experimental and numerical study of rigid particles with two planes of symmetry approaching a stable, stationary orientation while sedimenting" by C. Shekhar, H. N. Mirajkar, P. Zdybel, Y. Melikhov and M. L. Ekiel-Jeżewska (J. Fluid Mech. (2026), vol. 1034, A7, doi:10.1017/jfm.2026.11438).Seven types of millimeter-sized rigid particles with two orthogonal symmetry planes were used in the experiments, with the following shapes: cone (C), crescent moon (M), arrowhead (A), rings with the 1 mm (R1), 2 mm (R2), 3 mm (R3), and 4 mm (R4) openings. The particles were provided by Koniarscy S. C., Poland (the product codes: for crescent moons 13014 5, for cones 12973 8, for arrowheads KAHE106, for rings SMKSC0506C; the rings were opened manually).The particles were settling in the tank filled with silicon oil at a Reynolds number much smaller than unity. We used three types of initial orientations of the particles when released at the fluid surface: inverted (I), stationary (S), and inclined (IN). In the repository, the evolution of the shape orientation and of the center position are shown for 138 experimental trials.For each trial, we present the superposition of a sequence of the processed images recorded by two cameras placed perpendicularly to the front and side of the tank, separated by the same time interval. The names of the files contain the name of the particle according to the abbreviations presented above, the initial orientation, and the label of the trial. The number and labels of experimental trials with the stationary, selected inverted and selected inclined orientations are listed in a separate file.In the manuscript, the following trials were shown:C_I_T2, A_I_T2, M_I_T2, R1_I_T4, R2_I_T5, R3_I_T3, R4_I_T3 (Figures 4, 5, 6, 7);A_IN_T4, R1_IN_T3 (Figure 8);M_I_T0, R1_I_T3, R4_IN_T6 (Figure 12).