Flow pattern and power consumption in a vibromixer

Wójtowicz, Ryszard

doi:10.1016/j.ces.2017.07.010

Cited by 23 publications

(7 citation statements)

References 18 publications

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“…The helpful tools that can be successfully used during design and optimizing the operation of device and equipment, applied in energy production processes [31][32][33], chemical engineering [34][35][36], process engineering [37][38][39] and environmental protection processes [40][41][42] are computer simulation packages, based on specially created codes of Computational Fluid Dynamics (CFD) [43,44]. Their advantages such as the universality of application, ability to quickly modify size and geometry of designed device and also broad possibility of simulations single and multiphase flows, make them useful for analysis, re-scaling and design optimization of dust separators, including cyclones.…”

Section: Methodology Of Numerical Simulationsmentioning

confidence: 99%

Numerical and Experimental Analysis of Flow Pattern, Pressure Drop and Collection Efficiency in a Cyclone with a Square Inlet and Different Dimensions of a Vortex Finder

Wójtowicz

Wolak²,

Wójtowicz-Wróbel

2020

Energies

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The paper presents results of numerical simulations and experimental investigations of a cyclone with a square inlet and different dimensions of a vortex finder. Investigations were conducted for five, different cyclone models. The main goal of the research was to determine the influence of cyclone vortex finder geometry (diameter, length) on key parameters for a cyclone operation, such as: gas flow pattern, gas velocity and pressure distribution, pressure drop and collection efficiency. The analysis of flow pattern inside the cyclone was carried out with the use of CFD (Computational Fluid Dynamics) simulations, verified using CTA (Constant Temperature Anemometry). Similarly, pressure distributions, pressure drop and collection efficiency for cyclones were determined numerically and with measurements. The study demonstrated that dimensions of the vortex finder have a significant effect on a cyclone performance. The numerical visualisations of flow showed some unfavorable and beneficial effects and phenomena that may occur in cyclones. Moreover, the smallest pressure drop (305 Pa) was predicted for the cyclone with a maximum diameter of the vortex finder (De = 0.105 m), the largest (358 Pa) when this diameter was the smallest (De = 0.075 m). The tests did not show any significant influence of the vortex finder length on the pressure drop in a cyclone. A different tendency was observed in the case of collection efficiency. The maximum value of this parameter (89.5%) was predicted for the cyclone with the shortest vortex finder (s = 0.060 m), minimum (85.5%) when the vortex finder was the longest (s = 0.220 m). In this case, however, tests did not show a significant impact of an outlet diameter on the collection efficiency. Results and conclusions presented in this paper can be practically used for design optimization of cyclone separators, and also to select their operating parameters.

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Section: Methodology Of Numerical Simulationsmentioning

confidence: 99%

Numerical and Experimental Analysis of Flow Pattern, Pressure Drop and Collection Efficiency in a Cyclone with a Square Inlet and Different Dimensions of a Vortex Finder

Wójtowicz

Wolak²,

Wójtowicz-Wróbel

2020

Energies

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“…The purpose of this article is the kinetostatic analysis of a planetary mechanism with two external gears operating as part of a drive of a rotationally reciprocating stirred tank. The idea of imparting various non-stationary types of motion, including rotationally reciprocating motion, to the impeller of the stirred tank has been supported by many researchers around the world [27][28][29]. Despite the increasing complexity of the drive constructions, the prospects of this research area are due to a significant increase in the mixing efficiency, which has been experimentally confirmed using various practical examples [30,31].…”

Section: Introductionmentioning

confidence: 94%

Force analysis of the two-satellite planetary mechanism with elliptical gears

Prikhodko

2021

Mechanics and Mechanical Engineering

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Non-circular gears can be used in modern machines and mechanisms for the implementation of various types of motion and have high strength and compactness compared to linkage mechanisms. This article presents the force analysis of non-circular gear on the example of the planetary mechanism with elliptical gears, providing the rotationally reciprocating motion of the impeller of the stirred tank. Based on the calculation schemes of the links, kinetostatic balance equations for each link of the mechanism are compiled and solved. Reaction forces in kinematic pairs and balancing moment on the input shaft of the mechanism are found. The results can be used in the synthesis and analysis of various machines with the proposed kinematic scheme of the mechanism.

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“…Подтверждением сложности задачи может являться тот факт, что задачи численного моделирования составляющих этого процесса являются нетривиальными и им посвящены отдельные исследования. Вид перемешивания теплоносителя, характерный для динамического режима размораживания, сначала был исследован в качестве задачи гидродинамики [82], а затемсмоделирован [83]. Процесс плавления вещества в капсулах или оболочках [84,85] является отдельной задачей в термодинамике.…”

Section: наименование вида информационных сведений об экспериментахunclassified

Thermolability of factor VIII in donor fresh frozen blood plasma

Lemondzhava

Чечеткин

Гудков

et al. 2021

Gematologiâ i transfuziologiâ

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A criterion of the quality of fresh frozen blood plasma (FFP) is the activity of clotting factor VIII (FVIII).Aim — to identify technological barriers in the study of FVIII thermolability and to describe the requirements for experiments, providing new knowledge about the thermolability of this factor.Basic information. An analysis of domestic and foreign publications devoted to the study of the mechanisms responsible for reducing the value of FVIII activity in donor blood plasma from the moment of donation to the moment of transfusion was carried out. Data on the decrease in FVIII activity at various stages of work with blood plasma are presented. An analysis of methods for preparing samples for studying changes in the values of FVIII in donor blood plasma was performed. The existence of contradictory conclusions about the infl uence on the change in FVIII at the thawing stage of various values of the effects on FFP and poor knowledge of the change in the indicator at the stage of heating to the transfusion temperature after the end of the phase transition in the samples was established. The fundamental differences in the methods of preparing and conducting experiments in previous works are determined. Methods for increasing the reliability of experimental results for studying the thermal lability of FVIII are proposed.

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Flow pattern and power consumption in a vibromixer

Cited by 23 publications

References 18 publications

Numerical and Experimental Analysis of Flow Pattern, Pressure Drop and Collection Efficiency in a Cyclone with a Square Inlet and Different Dimensions of a Vortex Finder

Numerical and Experimental Analysis of Flow Pattern, Pressure Drop and Collection Efficiency in a Cyclone with a Square Inlet and Different Dimensions of a Vortex Finder

Force analysis of the two-satellite planetary mechanism with elliptical gears

Thermolability of factor VIII in donor fresh frozen blood plasma

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