Transition to turbulence in wall-bounded shear flows --- data included in the JFM article --- 2023-2024 --- OPUS-21 NCN project (2021/41/B/ST8/03142)

<p><span style="font-size:12.04px">Data included in the article: </span><span style="font-size:12.04px">L.Klotz, K.Bukowski, K.Gumowski, &#34;Influence of porous material on the flow behind a backward-facing step: experimental study&#34;, Journal of Fluid Mechanics, Volume 998, 10 November 2024, A31, DOI: https://doi.org/10.1017/jfm.2024.639</span></p><p><span style="font-size:12.04px">This research was funded by National Science Center (Poland) within the OPUS-21 project (2021/41/B/ST8/03142).</span></p><div style="margin-top:0.5em;margin-bottom:0.5em">The zip folder includes 34 fully editable files in .fig format (native MATLAB format) that contain all the information about the data published in the article. This includes:</div><div style="margin-top:0.5em;margin-bottom:0.5em"> 1) Fig.  2 - top view of flow visualisations.<br /> 2) Fig.  3 - side view of flow visualisations.<br /> 3) Fig.  4 - instantaneous streamwise velocity component.<br /> 4) Fig.  5 - instantaneous wall-normal velocity component.<br /> 5) Fig.  6 - instantaneous spanwise vorticity fluctations.<br /> 6) Fig.  7 - Spatio-spectral diagrams with Strouhal number.<br /> 7) Fig.  8 - averaged spectra along the streamwise direction.<br /> 8) Fig.  9 - dominant Strouhal number. <br /> 9) Fig. 10 - bifurcation diagram with squared amplitude of dominant Strouhal number.<br />10) Fig. 11 - spatial envelope of mode 1.<br />11) Fig. 12 - spatial envelope of mode 2.<br />12) Fig. 13 - difference between spatial envelopes of mode 2 and mode 1.<br />13) Fig. 14 - streamwise dependence of amplitudes of envelope 1 and envelope 2.<br />14) Fig. 15 - averaged spectra along the streamwise direction with enhanced spectra resolution.<br />15) Fig. 16 - dominant Strouhal numbers defined with different characteristic length scales.<br />16) Fig. 17 - time-averaged streamwise velocity profiles at the separation edge and near the re-attachment region.<br />17) Fig. 18 - streamwise vorticity and wall-normal velocity fields measured in the cross-stream plane for Re&#61;280.<br />18) Fig. 19 - streamwise vorticity and wall-normal velocity fields measured in the cross-stream plane for Re&#61;380.<br />19) Fig. 20 - spatial FFT spectra along the spanwise direction for Re&#61;280 and Re&#61;380.<br />20) Fig. 21 - streamwise and wall-normal velocity components, along with spatial envelopes of mode 1 and mode 2, in x–y planes at different z locations for the solid impermeable reference case.<br />21) Fig. 22 - streamwise and wall-normal velocity components, along with spatial envelopes of mode 1 and mode 2, in x–y planes at different z locations for 10 PPI.<br />22) Fig. 23 - spanwise and streamwise velocity components measured in top view.<br />23) Fig. 24 - velocity and velocity fluctuations profiles along the spanwise direction.<br />24) Fig. 25 - velocity fluctuations at the separation edge.<br />25) Fig. 26 - momentum and displacement thickness at the separation edge.<br />26) Fig. 27 - streamwise velocity profiles above the inserts upstream of the separation edge.<br />27) Fig. 28 - streamwise and wall-normal velocity fluctuations upstream of the separation edge.<br />28) Fig. 29 - spatial distribution of time-averaged streamwise and wall-normal velocity components.<br />29) Fig. 30 - streamwise velocity profiles measured at different streamwise locations downstream of the separation edge.<br />30) Fig. 31 - spatial distribution of time-averaged pressure gradient along streamwise and wall-normal directions.<br />31) Fig. 32 - global spatial maximum of time-averaged streamwise pressure gradient<br />32) Fig. 33 - pressure gradient profiles along the wall-normal direction y downstream of the separation edge.<br />33) Fig. 34 - top view of porous inserts.<br />34) Fig. 35 - pressure drop along the streamwise distance across the thin porous inserts.<br />35) Fig. 36 - streamwise and wall-normal velocity fluctuations as a function of the distance from the separation edge.</div>