Experimental investigation of the flow field generated by idealized human foot tapping

Benabed, Ahmed; Limam, Karim; Janssens, Bart; Bosschaerts, Walter; Vercauteren, Jan

doi:10.1080/23744731.2019.1614427

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…The velocity profile was corrected using equation (3). The maximal velocity shows a peak of U = 1.27 m/s at a distance y = 8 × 10 −3 m from the wall and then decreases slowly between y = 8 × 10 −3 m and y = 14.5 × 10 −3 m. This result was in good agreement with result of our previous work (Benabed et al, 2019). The profile decreases sharply for larger values of y .…”

Section: The Measurement Results Of the Foot Tappingsupporting

confidence: 92%

“…First, the transverse distribution of the maximum velocity in the x direction, that is, the variation of U max = f ( y ) at a distance x = 4.5 × 10 −2 m from the top of the simulator was carried out (see Figure 11(a)). This distance corresponds to the horizontal distance at which the vortex in front of the foot is well-formed, as observed in our previous work (Benabed et al, 2019) and that was carried out under the same conditions as the present work. Measurement points belong to the vertical symmetry plane of the plate.…”

Section: Methodssupporting

confidence: 81%

“…The authors modeled the airflow under the rotating foot as a rotating corner flow, and it was shown that such modeling can capture the major characteristics of the airflow generated by the rotating foot. Recently, by using the PIV technique, we have shown the formation of two contra-rotating vortices after the tapping movement of a mechanical foot simulator (Benabed et al, 2019). These two vortices combine and move forward along the flooring and then dissipate far from the simulator.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation of the airflow generated by the human foot tapping using the hot-wire anemometry

Benabed

Limam

Janssens

et al. 2020

Journal of Building Physics

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Human-walking-induced particle resuspension in indoor environments is believed to be an important source of particulate matter. Aerodynamic disturbance generated by the human foot during a gait cycle are the main driver for particle detachment and dispersion in the room. In this work, the hot-wire anemometry technique was employed to investigate the airflow generated by one phase of the human gait cycle: the foot tapping. This phase was simulated by a mechanical simulator that consists of a wooden rectangular 25 × 8 × 1.2 cm plate, and a servomotor that allows downward and upward rotations of the plate with a constant velocity. A correction procedure based on the hot-wire velocity measurements and the analytical solution of Falkner–Skan has been derived to correct the hot-wire readings in the near-wall region. Results show a sharp increase of airflow velocity in front of the simulator after the simulator rotation. Transverse hot-wire measurements downstream of the simulator show that the profile of the maximal velocities reaches a peak at a distance y = 8 × 10−3 m from the wall. The expulsed air from the volume under the simulator propagates downstream from the foot to reach near zero velocity values at 0.15 m away from the top of the simulator.