Autor: Kuncewicz, Cz. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Naprężenia turbulentne w pobliżu mieszadła Rushtona
Turbulent stresses in the vicinity of Rushton impeller
Autorzy:: Stelmach, J.
Kuncewicz, Cz.
Powiązania:: https://bibliotekanauki.pl/articles/2073328.pdf
Data publikacji:: 2018
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: mieszadło Rushtona
naprężenia turbulentne
PIV
Rushton impeller
turbulent stresses
Opis:: Przedstawiono wyniki pomiarów naprężeń turbulentnych powstających w cieczy w pobliżu mieszadła Rushtona. Stwierdzono, że naprężenia turbulentne osiągają największe wartości w pobliżu końców łopatek mieszadła. Poza niewielkim obszarem w pobliżu mieszadła wartości naprężeń turbulentnych szybko zmniejszają się.
The paper presents measurement results of turbulent stresses occurring in liquid near the Rushton impeller. It was found that turbulent stresses reached the highest values near impeller blades tips. Outside the small area near the impeller, the turbulent stresses values quickly decreased.
Źródło:: Inżynieria i Aparatura Chemiczna; 2018, 5; 150--151
0368-0827
Pojawia się w:: Inżynieria i Aparatura Chemiczna
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Gravity Drainage Kinetics of Papermaking Fibrous Suspensions
Autorzy:: Przybysz, P.
Kuncewicz, Cz.
Rieger, F.
Powiązania:: https://bibliotekanauki.pl/articles/185583.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: drenaż
zawiesina włóknista
kinetyka odwadniania
drainage
fibrous suspensions
drainage kinetics
Opis:: The study analyses application possibilities of filtration and thickening models in evaluation of papermaking suspension drainage rate. The authors proposed their own method to estimate the drainage rate on the basis of an existing Ergun capillary model of liquid flow through a granular material. The proposed model was less sensitive to porosity changes than the Ergun model. An empirical verification proved robustness of the proposed approach. Taking into account discrepancies in the published data concerning how the drainage velocity of papermaking suspension is defined, this study examines which of the commonly applied models matches experimental results the best.
Źródło:: Chemical and Process Engineering; 2014, 35, 4; 421-434
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: A new device for character isation of the drainage kinetics of fibrous suspensions under gravity
Autorzy:: Przybysz, P.
Kuncewicz, Cz.
Rieger, F.
Powiązania:: https://bibliotekanauki.pl/articles/185015.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: drenaż
zawiesina włóknista
drainage
fibrous suspensions
drainage apparatus
Opis:: Gravity dewatering of fibrous suspension is one of basic technological operations in paper production process. Although there are numerous methods to determine dewatering of such suspensions, none of them can measure undisturbed flow of removed water. In the paper the idea and design of a new apparatus for the determination of drainage rate of fibrous suspensions is presented. The apparatus differs from other known devices by minimisation of filtrate flow resistance in the outlet part of the equipment. In the second part of the paper measurements of the drainage rate have been presented. The flow resistance of the fluid through the bottom wire screen in the device was determined. The calculated flow resistance will be used in the developed model of dynamic drainage of fibrous suspensions, which will be discussed in our following paper (Przybysz et al., 2014).
Źródło:: Chemical and Process Engineering; 2014, 35, 4; 409-420
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Analysis of the mechanism of gas bubble break-up in liquids during the self-aspirating impeller operation
Autorzy:: Stelmach, J.
Kuncewicz, Cz.
Musoski, R.
Powiązania:: https://bibliotekanauki.pl/articles/185320.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: self-aspirating impeller
PIV
gas bubble size distribution
energy dissipation rate
gas bubble sizes
pęcherzyk gazu
rozpraszanie energii
Opis:: Feasibility of a model of gas bubble break-up and coalescence in an air-lift column enabling determination of bubble size distributions in a mixer with a self-aspirating impeller has been attempted in this paper. According to velocity measurements made by the PIV method with a self-aspirating impeller and Smagorinski’s model, the spatial distribution of turbulent energy dissipation rate close to the impeller was determined. This allowed to positively verify the dependence of gas bubble velocity used in the model, in relation to turbulent energy dissipation rate. Furthermore, the range of the eddy sizes capable of breaking up the gas bubbles was determined. The verified model was found to be greatly useful, but because of the simplifying assumptions some discrepancies of experimental and model results were observed.
Źródło:: Chemical and Process Engineering; 2016, 37, 3; 441-457
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

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