"35" . "Characteristics of Turbulent Particle Transport in Human Airways under Steady and Cyclic Flows" . . "Jedelsk\u00FD, Jan" . . . . "Characteristics of Turbulent Particle Transport in Human Airways under Steady and Cyclic Flows"@en . . "2012" . . . "http://dx.doi.org/10.1016/j.ijheatfluidflow.2012.01.003" . . . . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . . . . "RIV/00216305:26210/12:PU103442" . "[B1067D599DA8]" . . "0142-727X" . . "3"^^ . "P(GAP105/11/1339), P(ME09030), P(OC10052), S" . "Motion of monodispersed micron-sized particles suspended in air flow was studied on transparent model of human airways using Phase-Doppler Particle Analyser (P/DPA). Time-resolved velocity data for particles in size range 1 to 8 um were processed using Fuzzy Slotting Technique embedded in Kern software (Nobach, 2002) to estimate power spectral density (PSD) of velocity fluctuations. Optimum setup of the software for these data was found and recommendations for improvements of future experiments were given. Typical PSD plots are documented and mainly differences among (1) steady-flow regimes and analogous cyclic breathing regimes, (2) inspiration and expiration breathing phase and (3) behaviour of particles with different size are described for several different positions in the airway model. Systematically higher content of velocity fluctuations in the upper part of frequency range (30 to 500 Hz) was found for cyclic flows in comparison with corresponding steady flows. Expiratory flows in both the (s" . "L\u00EDzal, Franti\u0161ek" . "000306351400011" . "9"^^ . "RIV/00216305:26210/12:PU103442!RIV13-GA0-26210___" . . "126786" . "3"^^ . . "Motion of monodispersed micron-sized particles suspended in air flow was studied on transparent model of human airways using Phase-Doppler Particle Analyser (P/DPA). Time-resolved velocity data for particles in size range 1 to 8 um were processed using Fuzzy Slotting Technique embedded in Kern software (Nobach, 2002) to estimate power spectral density (PSD) of velocity fluctuations. Optimum setup of the software for these data was found and recommendations for improvements of future experiments were given. Typical PSD plots are documented and mainly differences among (1) steady-flow regimes and analogous cyclic breathing regimes, (2) inspiration and expiration breathing phase and (3) behaviour of particles with different size are described for several different positions in the airway model. Systematically higher content of velocity fluctuations in the upper part of frequency range (30 to 500 Hz) was found for cyclic flows in comparison with corresponding steady flows. Expiratory flows in both the (s"@en . "J\u00EDcha, Miroslav" . "Characteristics of Turbulent Particle Transport in Human Airways under Steady and Cyclic Flows"@en . . . . . . . . "26210" . . . "Characteristics of Turbulent Particle Transport in Human Airways under Steady and Cyclic Flows" . "INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW" . "Aerosol, Human airway model, Power spectral density, Velocity fluctuations, Stokes number, Steady flows, Cyclic flows, Laser Doppler Anemometry"@en .