Temat: pipe flow - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Multiphase flow mixture in 180[degrees] pipe bends
Autorzy:: Pietrzak, M.
Witczak, S.
Powiązania:: https://bibliotekanauki.pl/articles/185343.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: hydrodynamics
gas-liquid flow
pipe bends
hydrodynamika
przepływ gazu i cieczy
kolanko
Opis:: This paper presents the results of research regarding measurements of the values of pressure drops during horizontal flow of gas-liquid and gas-liquid-liquid mixture through 180o pipe bends. The conducted insightful analysis and assessment during multi-phase flow in pipe bends has enabled to develop a new method for determination of their values. This new method for determining pressure drops ensures higher precision of calculation in comparison to other methods presented in literature and can be applied for calculation of these parameters during multi-phase flows in pipe bends with various geometries.
Źródło:: Chemical and Process Engineering; 2013, 34, 2; 227-239
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Energetic efficiency of mixing in a periodically reoriented Dean flow
Autorzy:: Rożeń, Antoni
Kopytowski, Janusz
Powiązania:: https://bibliotekanauki.pl/articles/2086805.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: computational fluid dynamics
laminar flow
chaotic advection
curvilinear pipe
time analysis
obliczeniowa dynamika płynów
przepływ laminarny
rura krzywoliniowa
analiza czasu
Opis:: The energetic efficiency of mixing is studied numerically in a continuous flow mixer constructed from a sequence of alternately twisted pipe bends. Counter-rotating vortices present in the curved channels and known as Dean vortices narrow the distribution of the residence time of fluid elements and accelerate the generation of a new material surface without obstructing the main flow and increasing the risk of fouling or flow stoppage. Cyclic twisting of the pipe curvature allows for quick reorientation of Dean vortices. The reorientation induces chaotic advection in a stable three-dimensional flow and speeds up mixing. The effect of computational domain discretisation for the low and medium Reynolds numbers (20 < Re < 2000º on the head loss, primary and secondary flow, residence time distribution, and the energetic efficiency of generation of the inter material surface is determined. The energetic efficiency is calculated in the time space, a standard approach in modelling reactive micromixing, and at the reactor exit. The maximum energetic efficiency is determined for Re = 600 : 700. It is also found that the initial orientation of the material surface to the pipe curvature has a significant impact on the energetic efficiency of mixing.
Źródło:: Chemical and Process Engineering; 2021, 42, 4; 391--410
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

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