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Wyszukujesz frazę "Piątkiewicz, W." wg kryterium: Autor


Wyświetlanie 1-4 z 4
Tytuł:
A New Method for Assessing Haemolysis in a Rotary Blood Pump Using Large Eddy Simulations (LES)
Autorzy:
Szwast, M.
Moskal, A.
Piątkiewicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/185020.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
rotary blood pump
large eddy simulations
haemolysis
obrotowa pompa krwi
duże symulacje wirów
hemoliza
Opis:
The opportunity to assess haemolysis in a designed artificial heart seems to be one of the most important stages in construction. We propose a new method for assessing haemolysis level in a rotary blood pump. This method is based on CFD calculations using large eddy simulations (LES). This paper presents an approach to haemolysis estimation and shows examples of numerical simulation. Our method does not determine the value of haemolysis but allows for comparison of haemolysis levels between different artificial heart constructions.
Źródło:
Chemical and Process Engineering; 2017, 38, 2; 231-239
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mathematical model for biological cell deformation in a cylindrical pore
Autorzy:
Szwast, M.
Suchecka, T.
Piątkiewicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/185778.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
deformacja komórek
czerwone krwinki
cell deformation
red blood cell
cell stamina
Opis:
Some studies show that cells are able to penetrate through pores that are smaller than cell size. It concerns especially Red Blood Cells but it also may concern different types of biological cells. Such penetration of small pores is a very significant problem in the filtration process, for example in micro or ultrafiltration. Deformability of cells allows them to go through the porous membrane and contaminate permeate. This paper shows how cells can penetrate small cylindrical holes and tries to assess mechanical stress in a cell during this process. A new mathematical approach to this phenomenon was presented, based on assumptions that were made during the microscopic observation of Red Blood Cell aspiration into a small capillary. The computational model concerns Red Blood Cell geometry. The mathematical model allows to obtain geometrical relation as well as mechanical stress relations.
Źródło:
Chemical and Process Engineering; 2012, 33, 3; 385-396
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of postproduction suspensions’ concentration processes by “batch” membrane microfiltration
Autorzy:
Szwast, M.
Szwast, Z.
Grądkowski, M.
Piątkiewicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/185409.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
microfiltration
mathematical modeling
membrane processes
filtration pseudocycles
postproduction suspension
mikrofiltracja
modelowanie matematyczne
proces membranowy
postprodukcja
Opis:
The mathematical model of postproduction suspension concentration by microfiltration has been developed. This model describes a process conducted in a batch system with membrane washing by reverse flow of permeate. The model considerations concern filtration pseudocycles consisting of the filtration period and the membrane washing period. The balances of continuous phase volume, dispersed phase mass and energy, for each period of pseudocycle respectively, have been presented.
Źródło:
Chemical and Process Engineering; 2013, 34, 3; 313-325
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhancement of supercritical fluid extraction in membrane cleaning process by addition of organic solvents
Autorzy:
Krzysztoforski, J.
Krasiński, A.
Henczka, M.
Piątkiewicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/185233.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
supercritical fluid
extraction
porous membrane
TIPS
płyn nadkrytyczny
wydobycie
membrana porowata
Opis:
In this study, the process of membrane cleaning by supercritical fluid extraction was investigated. Polypropylene microfiltration membranes, contaminated with oils, were treated in a batch process with a supercritical fluid (SCF). As extractant, pure supercritical carbon dioxide or supercritical carbon dioxide with admixtures of methanol, ethanol and isopropanol were used. Single-stage and multi-stage extraction was carried out and process efficiency was determined. The obtained results showed that addition of organic solvents significantly enhances the cleaning performance, which increases with increase of organic solvent concentration and decreases with increasing temperature. All three solvents showed a comparable effect of efficiency enhancement. The results confirmed that supercritical fluid extraction can be applied for polypropylene membrane cleaning.
Źródło:
Chemical and Process Engineering; 2013, 34, 3; 403-414
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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