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[96280] Artykuł:

Validation of friction factor predictions in vertical slurry flows with coarse particles

(Walidacja przewidywania strat tarcia w pionowych przepływach grubo-dyspersyjnej hydromieszaniny)
Czasopismo: Journal of Hydrology and Hydromechanics   Tom: X, Zeszyt: 68, Strony: 1-9
ISSN:  1338-4333
Opublikowano: Luty 2020
Liczba arkuszy wydawniczych:  1.00
 
  Autorzy / Redaktorzy / Twórcy
Imię i nazwisko Wydział Katedra Do oświadczenia
nr 3		 Grupa
przynależności		 Dyscyplina
naukowa		 Procent
udziału		 Liczba
punktów
do oceny pracownika		 Liczba
punktów wg
kryteriów ewaluacji
Artur Bartosik orcid logo WZiMKKatedra Inżynierii ProdukcjiTakzaliczony do "N"Inżynieria mechaniczna10070.0070.00  

Grupa MNiSW:  Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A)
Punkty MNiSW: 70

Pełny tekstPełny tekst     Web of Science Logo Web of Science    
Słowa kluczowe:

przepływ grubo-dyspersyjnej fazy stałej  naprężenia ściana - cząstka stała  modelowanie pionowego przepływu 

Keywords:

flow with coarse particles  particle-wall stress  modelling of vertical flow 


Streszczenie:

Artykuł prezentuje walidację modelu matematycznego, opracowanego przez Shook i Bartosik, opisującego straty tarcia w turbulentnym przepływie grubo-dyspersyjnej fazy stałej w pionowych rurociągach tłocznych. Wyniki walidacji przedstawiono dla trzech różnych faz stałych, którymi są: Canasphere, PVC oraz Sand o gęstości od odpowiedni 1045, 1400 i 2650 kg/m3 i dla zakresu objętościowej koncentracji fazy stałej od 0.1 do 0.45. Fazę stałą stanowią cząstki o średnicach odpowiednio 1.5 mm, 2.8 mm i 3.4 mm. Wyniki walidacji jednoznacznie wskazują przydatność modelu matematycznego do przewidywania strat tarcia w pionowych instalacjach tłocznych. W artykule podjęto się dyskusji na temat zastosowanego modelu matematycznego ze szczególnym uwzględnieniem tłumienia turbulencji, która wg. autora istnieje przede wszystkim w średnio-dyspersyjnych, ale także w grubo-dyspersyjnych hydromieszaninach.



Abstract:

The paper presents validation of a mathematical model describing the friction factor by comparing the predicted and measured results in a broad range of solid concentrations and mean particle diameters. Three different types of solids, surrounded by water as a carrier liquid, namely Canasphere, PVC, and Sand were used with solids density from 1045 to 2650 kg/m3, and in the range of solid concentrations by volume from 0.10 to 0.45. All solid particles were narrowly sized with mean particle diameters between 1.5 and 3.4 mm. It is presented that the model predicts the friction factor fairly well. The paper demonstrates that solid particle diameter plays a crucial role for the friction factor in a vertical slurry flow with coarse solid particles. The mathematical model is discussed in reference to damping of turbulence in such flows. As the friction factor is below the friction for water it is concluded that it is possible that the effect of damping of turbulence is included in the KB function, which depends on the Reynolds number.


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