A method for the determination of shear viscosity of power–law fluids in a rectangular duct and concentric annulus
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F22%3A00352904" target="_blank" >RIV/68407700:21220/22:00352904 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1002/apj.2727" target="_blank" >https://doi.org/10.1002/apj.2727</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/apj.2727" target="_blank" >10.1002/apj.2727</a>
Alternative languages
Result language
angličtina
Original language name
A method for the determination of shear viscosity of power–law fluids in a rectangular duct and concentric annulus
Original language description
This work deals with a practical approach for the determination of the rheological parameters of the purely viscous power–law fluids in the rectangular channel and concentric annulus. The rectangular channels with a height to width ratio (aspect ratio) of less than 0.1 and concentric annulus of large aspect ratios are used for the determination of the shear viscosity of the non-Newtonian fluids. For rectangular channels of aspect ratio greater than 0.1, the determination of the shear viscosity for the power–law model requires two geometrical parameters, according to conventional methods. In this work, a practical method is introduced in order to determine rheological parameters of the power–law fluids for rectangular channels and concentric annulus with the aspect ratios between 0 and 1 using one geometric parameter. The validity of the suggested one-parameter method is firstly compared with the conventionally used two-parameter model analytically. Then, verification is carried out by experimental method using slit viscometer and a rectangular channel with an aspect ratio of 0.2. Obtained wall shear rate-wall shear stress values from both geometries are compared and finally obtained rheological parameters are verified by numerical methods. It has shown that the suggested method is successful for the determination of shear viscosity, and results reveal that rectangular channels with an aspect ratio greater than 0.1 can be used to obtain rheological parameters for power–law fluids.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20402 - Chemical process engineering
Result continuities
Project
<a href="/en/project/GA21-07851S" target="_blank" >GA21-07851S: Study of methods for modification of mechanical properties and structire of collagen matter</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Asia-Pacific Journal of Chemical Engineering
ISSN
1932-2135
e-ISSN
1932-2143
Volume of the periodical
17
Issue of the periodical within the volume
1
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
—
UT code for WoS article
000715632900001
EID of the result in the Scopus database
2-s2.0-85118553334