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	31st Symposium on anemometry: proceedings Chára, Zdeněk ; Klaboch, L. Proceedings of 31st Symposium on Anemometry. The conference was oriented on the experimental techniques applied in fluid mechanics. Detailed record
	Droplet size measurement in two-phase system Kysela, Bohuš ; Konfršt, Jiří ; Chára, Zdeněk ; Kotek, M. ; Šulc, R. The in-situ measurement method of droplet size in an agitated vessel based on droplet visualisation and image analysis were developed. The image analysis was enhanced by the finding edges algorithm and circularity analysis. The proposed method was validated by the measurements of precise solid particles and used for liquid-liquid mesurements in an agitated vessel. Detailed record
	Controlled movement of a spherical particle in an open channel Chára, Zdeněk ; Kysela, Bohuš ; Konfršt, Jiří The paper presents experimental results of the flow around the spherical particle, where the particles are placed on a thin rod and its movement is controlled by a step motor. To determine the velocity fields around the moving particle, the 2D PIV method was used. The measurement was carried out in the open channel, the bottom of which was covered with one layer of 6 mm diameter glass bars. Detailed record
	Analysis of non-harmonic excitation of synthetic jet actuators Kordík, Jozef ; Trávníček, Zdeněk Axisymmetric synthetic jet actuator based on a loudspeaker was tested experimentally. The actuator was driven by a voltage waveform, whose shape was derived from a pulse-width modulated signal. While the duty cycle and frequency of the excitation signal were varied the outlet velocities were measured by a hot-wire probe. Integral quantities such as characteristic velocity, momentum flux, and kinetic energy flux were evaluated from the outlet velocities. Their maxima were located as functions of frequency and the duty cycle. The found maximal values were compared with results obtained for harmonic excitation. The highest improvement (about 18%) was achieved for kinetic energy flux. Detailed record

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