Bubble dynamics in drinks
1 Institute of Thermomechanics AS CR, 182 00 Prague, Czech Republic
2 CTU, Faculty of Mechanical Engineering, 166 07 Prague, Czech Republic
a Corresponding author: email@example.com
Published online: 25 March 2014
This study introduces two physical effects known from beverages: the effect of sinking bubbles and the hot chocolate sound effect. The paper presents two simple „kitchen” experiments. The first and second effects are indicated by means of a flow visualization and microphone measurement, respectively. To quantify the second (acoustic) effect, sound records are analyzed using time-frequency signal processing, and the obtained power spectra and spectrograms are discussed.
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