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Laminar-turbulent transition in a constricted tube: Comparison of Reynolds-averaged Navier–Stokes turbulence models and large eddy simulation with experiments 

Elcner, Jakub; Lízal, František; Jedelský, Jan; Tuhovčák, Ján; Jícha, Miroslav (SAGE Journals, 2019-05-27)
Constricted tubes appear in many engineering as well as biological systems such as blood vessels or pulmonary airways. The aim of this article is to test the ability of different turbulence models to predict the flow field ...
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Application of big data analysis technique on high-velocity airblast atomization: Searching for optimum probability density function 

Urbán, András; Groniewski, Axel; Malý, Milan; Józsa, Viktor; Jedelský, Jan (Elsevier, 2020-08-01)
In this paper, the droplet size distributions of high-velocity airblast atomization were analyzed. The spray measurement was performed by a Phase-Doppler anemometer at several points and different diameters across the spray ...
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The role of the combined use of experimental and computational methods in revealing the differences between the micron -size particle deposition patterns in healthy and asthmatic subjects 

Farkas, Árpád; Lízal, František; Jedelský, Jan; Elcner, Jakub; Karas, Jakub; Bělka, Miloslav; Mišík, Ondrej; Jícha, Miroslav (Elsevier, 2020-07-10)
Quantification of airway deposition of aerosol particles is essential for the assessment of health risks of detrimental particles. Knowledge of deposition distribution is important also in the case of treatment with ...
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Internal flow characteristics in Spill-return pressure-swirl atomizers 

Malý, Milan; Sapík, Marcel; Cejpek, Ondřej; Lízal, František; Ondráček, Vladimír; Jícha, Miroslav; Jedelský, Jan (ILASS, 2019-09-04)
The spray produced by pressure-swirl atomizers strongly depends on the character of their internal flow. Flow field inside a swirl chamber of small pressure-swirl spill-return atomizers was examined using high-speed imaging ...
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The influence of spill-line geometry on a spray generated by a pressure-swirl atomizer 

Malý, Milan; Janáčková, Lada; Jedelský, Jan; Jícha, Miroslav (EDP Sciences, 2016-03-28)
An experimental investigation of characteristics of spray generated by a pressure-swirl atomizer (spill-return type) was performed using shadowgraphy and Phase-Doppler Anemometry (PDA). Several different geometries of the ...
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Measurement of an electronic cigarette aerosol size distribution during a puff 

Bělka, Miloslav; Lízal, František; Jedelský, Jan; Jícha, Miroslav; Pospíšil, Jiří (EDP SCIENCES, 2017-05-12)
Electronic cigarettes (e-cigarettes) have become very popular recently because they are marketed as a healthier alternative to tobacco smoking and as a useful tool to smoking cessation. E-cigarettes use a heating element ...
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Prediction of localized aerosol deposition in a realistic replica of human airways using experimental data and numerical simulation 

Lízal, František; Elcner, Jakub; Bělka, Miloslav; Jedelský, Jan; Jícha, Miroslav (EDP Sciences, 2016-11-15)
The presence of aerosol deposition hot-spots in human airways presumably contributes to development of various diseases. The overall aerosol deposition in human lungs can be predicted with sufficient accuracy nowadays. ...
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Comparison of turbulent models in the case of a constricted tube 

Elcner, Jakub; Lízal, František; Jícha, Miroslav (EDP Sciences, 2016-11-15)
The validation of a proper solution is an indispensable phase of every numerical simulation. Nowadays, many turbulent models are available, whose application leads to slightly different solution of flow behaviour depending ...
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Experimental verification of boundary conditions for numerical simulation of airflow in a benchmark ventilation channel 

Lízal, František; Niedoba, Pavel; Šeda, Libor; Jedelský, Jan; Jícha, Miroslav (EDP Sciences, 2016-03-28)
Correct definition of boundary conditions is crucial for the appropriate simulation of a flow. It is a common practice that simulation of sufficiently long upstream entrance section is performed instead of experimental ...
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Influence of operating conditions and atomizer design on circumferential liquid distribution from small pressure-swirl atomizer 

Malý, Milan; Janáčková, Lada; Jedelský, Jan; Jícha, Miroslav (EDP Sciences, 2017-05-12)
The spray symmetry is an important aspect in most practical applications. However, it is often an overlooked parameter. A measurement of circumferential distribution was carried out by a circular-sectored vessel on several ...
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AuthorJedelský, Jan (25)Jícha, Miroslav (19)Lízal, František (13)Malý, Milan (12)Elcner, Jakub (8)Sapík, Marcel (5)Janáčková, Lada (4)Bělka, Miloslav (3)Cejpek, Ondřej (3)Farkas, Árpád (3)... View MoreSubjectAtomization (4)CFD (4)Pressure-swirl (3)Rapeseed oil (3)Two-phase flow (3)Airblast (2)Airflow (2)Comparison of atomizers (2)computational fluid mechanics (2)experiment (2)... View MoreDate Issued2021 (1)2020 (5)2019 (10)2018 (5)2017 (3)2016 (6)2015 (1)2014 (3)

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