Browsing EÚ-odbor termomechaniky a techniky prostředí by Title
Now showing items 1-20 of 41
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2D and 3D numerical modelling of internal flow of Pressure-swirl atomizer
(EDP Sciences, 2019-06-28)This paper compares 2D axisymmetric and 3D numerical models used to predict the internal flow of a pressure-swirl atomizer using a commercial software Ansys Fluent 18.1. The computed results are compared with experimental ... -
An accuracy analysis of the front tracking method and interface capturing methods for the solution of heat transfer problems with phase changes
(IOP Publishing, 2016-06-19)Materials undergoing a phase change have a number of applications in practice and engineering. Computer simulation tools are often used for investigation of such heat transfer problems with phase changes since they are ... -
Air–liquid interactions in a pressure-swirl spray
(Elsevier, 2018-01-02)The energy transfer between a liquid hollow cone spray and the surrounding air has been studied using both imaging and phase-Doppler techniques. The spray was produced by a pressure-swirl atomizer discharging Jet A-1 fuel ... -
Application of big data analysis technique on high-velocity airblast atomization: Searching for optimum probability density function
(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 ... -
Characterization of aerosol nebulized by Aerogen Solo mesh nebulizer
(EDP Sciences, 2020-11-18)Nebulizers are commonly used devices for inhalation treatment of various disorders. There are three main categories of medical nebulization technology: jet nebulizers, ultrasound nebulizer, and mesh nebulizer. The mesh ... -
Comparison of turbulent models in the case of a constricted tube
(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 ... -
Effect of liquid preheating on high-velocity airblast atomization: From water to crude rapeseed oil
(Elsevier, 2019-04-01)Airblast atomization is a suitable model platform to understand atomization physics since the atomizer geometry has an insignificant influence on the spray formation. Besides its theoretical relevance, this configuration ... -
Effect of multiple liquid inlets on mass transfer in rotating packed beds
(EDP Sciences, 2020-11-18)This study deals with optimalization of rotating packed bed design using computational fluid dynamics approach. Comparison of three variants of liquid distributor were performed on 2D geometry. Turbulence was modelled using ... -
Effect of nanoparticles concentration on the characteristics of nanofluid sprays for cooling applications
(Springer, 2019-03-01)This study addresses the effect of nanofluid synthesis on the rheological properties of the resulting fluid and their consequent effect on the characteristics (size and velocity distribution of droplets, spray cone angle, ... -
Empirical correlation for spray half cone angle in plain-jet airblast atomizers
(Elsevier, 2020-10-01)Plain-jet airblast atomizers are widely used in industrial applications. The literature contains numerous papers on Sauter mean diameter, however, there is no estimation method available for spray cone angle, SCA, which ... -
Experimental verification of boundary conditions for numerical simulation of airflow in a benchmark ventilation channel
(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 ... -
Flow Behaviour of Inhaled Fibres – Equations of Motion and Preliminary Results of Real Trajectories Recorded by a High-Speed Camera
(EDP Sciences, 2020-11-18)The ability to precisely predict the fate of inhaled fibres is important for toxicologists as well as for pharmaceutists struggling to utilize fibres as carriers of a medication. However, the complexity of fibre movement ... -
High Quality Steel Casting by Using Advanced Mathematical Methods
(MDPI, 2018-12-04)The main concept of this paper is to utilize advanced numerical modelling techniques with self-regulation algorithm in order to reach optimal casting conditions for real-time casting control. Fully 3-D macro-solidification ... -
Impact of measurable physical phenomena on contact thermal comfort
(EDP Sciences, 2017-05-12)Cabin HVAC (Heating Ventilation and Air-conditioning) systems have become an essential part of personal vehicles as demands for comfortable transport are still rising. In fact, 85 % of the car trips in Europe are shorter ... -
Influence of operating conditions and atomizer design on circumferential liquid distribution from small pressure-swirl atomizer
(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 ... -
The influence of spill-line geometry on a spray generated by a pressure-swirl atomizer
(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 ... -
Inhalers and nebulizers: basic principles and preliminary measurements
(E D P SCIENCES, 2017-11-21)Inhalers are hand-held devices which are used for administration of therapeutic aerosols via inhalation. Nebulizers are larger devices serving for home and hospital care using inhaled medication. This contribution describes ... -
Internal flow and air core dynamics in Simplex and Spill-return pressure-swirl atomizers
(Elsevier, 2018-08-01)Spill-return (SR) atomizers enhance the construction of Simplex atomizers by addition of a passage in the rear wall of the swirl chamber through which the liquid can be spilled away. It allows to discharge the liquid always ... -
Internal flow characteristics in scaled pressure-swirl atomizer
(Technical University Liberec, 2018-06-04)Pressure-swirl atomizers are used in a wide range of industrial applications, e.g.: combustion, cooling, painting, food processing etc. Their spray characteristics are closely linked to the internal flow which predetermines ... -
Internal flow characteristics in Spill-return pressure-swirl atomizers
(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 ...