VISCOMETRY OF NANODISPERSE MAGNETIC LIQUIDS AND LUBRICATING OILS. 1. INSTRUMENTATION FOR RHEOLOGICAL STUDIES OF MAGNETIC NANODISPERSE LIQUID MEDIA

Analysis of the literature sources shows that the existing viscometers are not always and not completely able to provide comprehensive studies of magnetic nanofluids for scientific and practical purposes. Design has been developed of a magnetic rotary viscometer which makes it possible to carry out...

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Autores principales:	A.N. Bolotov, O.O. Novikova
Formato:	article
Lenguaje:	RU
Publicado:	Tver State University 2021
Materias:	magnetic nanofluid rheology coaxial viscometer shear stress shear rate coefficient of viscosity magnetic field external and internal friction Physical and theoretical chemistry QD450-801
Acceso en línea:	https://doaj.org/article/fc09eccf64e24f6291379e63b5a3a14a
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spelling	oai:doaj.org-article:fc09eccf64e24f6291379e63b5a3a14a2021-12-03T08:27:59ZVISCOMETRY OF NANODISPERSE MAGNETIC LIQUIDS AND LUBRICATING OILS. 1. INSTRUMENTATION FOR RHEOLOGICAL STUDIES OF MAGNETIC NANODISPERSE LIQUID MEDIA10.26456/pcascnn/2021.13.0442226-44422658-4360https://doaj.org/article/fc09eccf64e24f6291379e63b5a3a14a2021-12-01T00:00:00Zhttps://physchemaspects.ru/2021/doi-10-26456-pcascnn-2021-13-044/?lang=enhttps://doaj.org/toc/2226-4442https://doaj.org/toc/2658-4360Analysis of the literature sources shows that the existing viscometers are not always and not completely able to provide comprehensive studies of magnetic nanofluids for scientific and practical purposes. Design has been developed of a magnetic rotary viscometer which makes it possible to carry out investigations in a wide range of the magnetic field induction. The magnetic field in the device is directed orthogonally to the shear stress and can vary from zero to 1,7·10^5 A/m. The device has two measuring gaps filled with liquid, that increases the accuracy of the results of studies of low-viscosity liquids. The viscometer allows you to measure the standard characteristics of magnetic nanofluids (viscosity coefficient, plastic viscosity, ultimate shear stress, etc.), as well as to study the structural features of liquids under shear stresses. The shear rate in the liquid can be stably maintained in a wide range of (1÷5)·10^3 s^(-1). The viscosity of the studied liquids can vary from 10^(-3) Pa·s to ≈10^2 Pa·s. For studies on a viscometer, a small amount of magnetic nanofluid with a volume of about 3,5 cm^3 is required. Using experimental data, the mathematical description of the process of laminar fluid flow in the annular gap of the viscometer made it possible to optimize its geometric dimensions and obtain formulas for calculating the viscosity coefficient, shear stress and shear rate. A.N. BolotovO.O. NovikovaTver State Universityarticlemagnetic nanofluidrheologycoaxial viscometershear stressshear ratecoefficient of viscositymagnetic fieldexternal and internal frictionPhysical and theoretical chemistryQD450-801RUФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, Iss 13, Pp 44-55 (2021)
institution	DOAJ
collection	DOAJ
language	RU
topic	magnetic nanofluid rheology coaxial viscometer shear stress shear rate coefficient of viscosity magnetic field external and internal friction Physical and theoretical chemistry QD450-801
spellingShingle	magnetic nanofluid rheology coaxial viscometer shear stress shear rate coefficient of viscosity magnetic field external and internal friction Physical and theoretical chemistry QD450-801 A.N. Bolotov O.O. Novikova VISCOMETRY OF NANODISPERSE MAGNETIC LIQUIDS AND LUBRICATING OILS. 1. INSTRUMENTATION FOR RHEOLOGICAL STUDIES OF MAGNETIC NANODISPERSE LIQUID MEDIA
description	Analysis of the literature sources shows that the existing viscometers are not always and not completely able to provide comprehensive studies of magnetic nanofluids for scientific and practical purposes. Design has been developed of a magnetic rotary viscometer which makes it possible to carry out investigations in a wide range of the magnetic field induction. The magnetic field in the device is directed orthogonally to the shear stress and can vary from zero to 1,7·10^5 A/m. The device has two measuring gaps filled with liquid, that increases the accuracy of the results of studies of low-viscosity liquids. The viscometer allows you to measure the standard characteristics of magnetic nanofluids (viscosity coefficient, plastic viscosity, ultimate shear stress, etc.), as well as to study the structural features of liquids under shear stresses. The shear rate in the liquid can be stably maintained in a wide range of (1÷5)·10^3 s^(-1). The viscosity of the studied liquids can vary from 10^(-3) Pa·s to ≈10^2 Pa·s. For studies on a viscometer, a small amount of magnetic nanofluid with a volume of about 3,5 cm^3 is required. Using experimental data, the mathematical description of the process of laminar fluid flow in the annular gap of the viscometer made it possible to optimize its geometric dimensions and obtain formulas for calculating the viscosity coefficient, shear stress and shear rate.
format	article
author	A.N. Bolotov O.O. Novikova
author_facet	A.N. Bolotov O.O. Novikova
author_sort	A.N. Bolotov
title	VISCOMETRY OF NANODISPERSE MAGNETIC LIQUIDS AND LUBRICATING OILS. 1. INSTRUMENTATION FOR RHEOLOGICAL STUDIES OF MAGNETIC NANODISPERSE LIQUID MEDIA
title_short	VISCOMETRY OF NANODISPERSE MAGNETIC LIQUIDS AND LUBRICATING OILS. 1. INSTRUMENTATION FOR RHEOLOGICAL STUDIES OF MAGNETIC NANODISPERSE LIQUID MEDIA
title_full	VISCOMETRY OF NANODISPERSE MAGNETIC LIQUIDS AND LUBRICATING OILS. 1. INSTRUMENTATION FOR RHEOLOGICAL STUDIES OF MAGNETIC NANODISPERSE LIQUID MEDIA
title_fullStr	VISCOMETRY OF NANODISPERSE MAGNETIC LIQUIDS AND LUBRICATING OILS. 1. INSTRUMENTATION FOR RHEOLOGICAL STUDIES OF MAGNETIC NANODISPERSE LIQUID MEDIA
title_full_unstemmed	VISCOMETRY OF NANODISPERSE MAGNETIC LIQUIDS AND LUBRICATING OILS. 1. INSTRUMENTATION FOR RHEOLOGICAL STUDIES OF MAGNETIC NANODISPERSE LIQUID MEDIA
title_sort	viscometry of nanodisperse magnetic liquids and lubricating oils. 1. instrumentation for rheological studies of magnetic nanodisperse liquid media
publisher	Tver State University
publishDate	2021
url	https://doaj.org/article/fc09eccf64e24f6291379e63b5a3a14a
work_keys_str_mv	AT anbolotov viscometryofnanodispersemagneticliquidsandlubricatingoils1instrumentationforrheologicalstudiesofmagneticnanodisperseliquidmedia AT oonovikova viscometryofnanodispersemagneticliquidsandlubricatingoils1instrumentationforrheologicalstudiesofmagneticnanodisperseliquidmedia
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VISCOMETRY OF NANODISPERSE MAGNETIC LIQUIDS AND LUBRICATING OILS. 1. INSTRUMENTATION FOR RHEOLOGICAL STUDIES OF MAGNETIC NANODISPERSE LIQUID MEDIA

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