This file contains the experimental data and a MATLAB script that enables the reproduction of the figures in:

Timothy T.K. Chan, Luis Blay Esteban, Sander G. Huisman, John Shrimpton and Bharathram Ganapathisubramani
Settling behaviour of thin curved particles in quiescent fluid and turbulence
Journal of Fluid Mechanics
DOI: 10.1017/jfm.2021.520

The dataset also has a DOI:  https://doi.org/10.5258/SOTON/D1859 

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Data.mat contains three structures: 'Quiescent', 'Turb', and 'PIV'. They represent data of the quiescent cases, the turbulent cases, and PIV respectively. The list below documents the contents of 'Quiescent and 'Turb'. Unless otherwise specified, these fields are present in 'Quiescent' and 'Turb'.

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Field			   Remarks    		 Description
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A_nondim		   in 'Quiescent'	 dimensionless radial oscillation amplitude
Std_Anondim		   in 'Quiescent'	 standard deivation of dimensionless radial oscillation amplitude
alpha_fig4    		   in 'Quiescent'	 pitch angle of particle number 2 shown in figure 4. Units: deg
alphamax		   in 'Quiescent'	 magnitude of maximum pitch angle. Units: deg
Std_alphamax	   	   in 'Quiescent'	 standard deviation of magnitude of maximum pitch angle. Units: deg
amax			   in 'Quiescent'	 maximum vertical acceleration. Units: mm/s^2
Std_amax		   in 'Quiescent'	 standard deviation of maximum vertical acceleration. Units: mm/s^2
amax_pend		   in 'Quiescent'	 maximum vertical acceleration of pendulum model. Units: mm/s^2
Stdamax_pend	   	   in 'Quiescent'	 standard deviation of maximum vertical acceleration of pendulum model. Units: mm/s^2
Ar 						  			 Archimedes number
Std_Ar			   in 'Turb'		 standard deviation of Archimedes number
C			   in 'Quiescent'	 fitting parameter in pendulum model
Std_C			   in 'Quiescent'	 standard deviation of fitting parameter in pendulum model
D	  		   in 'Quiescent'	 length of uncurved diagonal of particle No. 1-4. Units: mm
D_CT,D_PC,D_SP     	   in 'Quiescent'    	 regime boudnaries of disks. Format: [Re I*]
dAngle_mean    	   	   in 'Quiescent'    	 average vertical slip angle over gliding sections. Units: deg
Std_dAngle    	   	   in 'Quiescent'    	 standard deviation of average vertical slip angle over gliding sections. Units: deg
edges_rnondim					 class mark of bins for probability density function of r_h/D in figure 12a
event_SD		   in 'Turb'		 end point of each event of slow descent trajectory shown in figure 11
event_RR		   in 'Turb'		 '' rapid rotation ''
event_VD		   in 'Turb'		 '' vertical descent ''
event_LG		   in 'Turb'		 '' long gliding motion ''
feventbin		   in 'Turb'		 class mark of event frequency bins
fevent_norm		   in 'Turb'		 dimensionless average descent velocity per event
I_star  		   in 'Quiescent'    	 dimensionless rotational inertia
KE_fluc						 vertical fluctuation kinetic energy per unit mass. Units: mm^2/s^2
Std_Kefluc					 standard deviation of vertical fluctuation kinetic energy per unit mass. Units: mm^2/s^2
Lpend_nondim	   	   in 'Quiescent'	 dimensionless radius of curvature of the trajectory in a vertical cross-section
Std_Lpendnondim	   	   in 'Quiescent'    	 standard deviation of dimensionless radius of curvature of the trajectory in a vertical cross-section
ma_star			   in 'Quiescent'	 added-mass coefficient
Std_ma_star		   in 'Quiescent'	 standard deviation of added-mass coefficient
N_Vevent		   in 'Turb'		 PDF of event velocities
N_rnondim					 probability density function of r_h/D of particle No. 3 in figure 12a. In 'Quiescent', only the PDF of particle No. 3 is included.
P_RA,P_SR    	   	   in 'Quiescent'    	 regime boudnaries of plates. Format: [Re I*]
Re 				   		 Reynolds number
Std_Re 				   		 standard deviation of Reynolds number
rh_fig9			   in 'Quiescent'	 radial position of the experimental trajectories shown in figure 9
St_r			   in 'Quiescent'	 Strouhal number
Std_Str			   in 'Quiescent'	 standard deviation of Strouhal number
rh_fig4    		   in 'Quiescent'	 radial position of particle number 2 shown in figure 4. Units: mm
rh_mod_fig9		   in 'Quiescent'	 dimensionless z-coordinates of  the model pendulum trajectory shown in figure 9
t_fig4    		   in 'Quiescent'	 time axis of figure 4. Units: sec
traj_fig4    	   	   in 'Quiescent'	 position of particle number 2 shown in figure 4. Format: [x y z]-coordinates. Units: mm
traj_SD	in 'Turb'				 dimensionless trajectory of slow descent trajectory shown in figure 11. Format: [x y z]-coordinates
traj_RR			   in 'Turb'		 '' rapid rotation ''
traj_VD			   in 'Turb'		 '' vertical descent ''
traj_LG			   in 'Turb'		 '' long gliding motion ''
V_fig4	  		   in 'Quiescent'    	 normalised (x,y,z)-components of velocities shown in figure 4
Vel_Z	  					 mean settling velocity of particle 1-4. Units: mm/s
Std_VelZ	  				 standard deviation of mean settling velocity of particle 1-4. Units: mm/s
Veventbin		   in 'Turb'		 class mark of PDF bins of event velocities
Vh_fig4	  		   in 'Quiescent'    	 normalised signed horizontal velocities shown in figure 4
Vhmax			   in 'Quiescent'	 dimensionless maximum horizontal speed in a swing
Std_Vhmax		   in 'Quiescent'	 standard deviation of dimensionless maximum horizontal speed in a swing
Vz_SD			   in 'Turb'		 instantaneous vertical velocity of slow descent trajectory shown in figure 11.
Vz_RR			   in 'Turb'		 '' rapid rotation ''
Vz_VD			   in 'Turb'		 '' vertical descent ''
Vz_LG			   in 'Turb'		 '' long gliding motion ''
Vzevent_norm	   	   in 'Turb'		 dimensionless average frequency per event
Vzbin			   in 'Turb'		 dimensionless event descent velocity averaged over all events
Vzevent_SD		   in 'Turb'		 velocity of events in slow descent trajectory in figure 15
Vzevent_RR		   in 'Turb'		 '' rapid rotation ''
Vzevent_VD		   in 'Turb'		 '' vertical descent ''
Vzevent_LG		   in 'Turb'		 '' long gliding motion ''
x_nondim_fig3	   	   in 'Quiescent'	 dimensionless x-coordinates of the trajectories shown in figure 4. Each column represents a new trajectory.
y_nondim_fig3	  	   in 'Quiescent'	 '' y-coordinates ''
z_nondim_fig3	   	   in 'Quiescent'	 '' z-coordinates ''
z_nondim_fig9	   	   in 'Quiescent'	dimensionless z-coordinates of the experimental trajectories shown in figure 9
z_nondim_mod_fig9  	   in 'Quiescent'	'' of the model pendulum trajectory ''

The list below describes the contents of 'PIV'
Autocorr_xx,xz,zx,zz	Autocorrelation functions
	.data	autocorrelation data
	.r	separation. Units: mm
umean
	.x,.z	(x,z) coordinates of interrogation window. Units: mm
	.vx,.vz	(x,z)-component of time-averaged flow velocity. Units: mm/s
urms
	.data	root-mean-square flow velocity fluctuations. Units: mm/s
	.x,.z	(x,z) coordinates of interrogation window. Units: mm

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PlotFigures.m is a MATLAB script which plots the figures in the article using the data in Data.mat.