FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2031544963> ?p ?o ?g. }

• W2031544963 endingPage "1308" @default.
• W2031544963 startingPage "1302" @default.
• W2031544963 abstract "Ferrofluid spin-up flow is studied within a sphere subjected to a uniform rotating magnetic field from two surrounding spherical coils carrying sinusoidally varying currents at right angles and 90° phase difference. Ultrasound velocimetry measurements in a full sphere of ferrofluid shows no measureable flow. There is significant bulk flow in a partially filled sphere (1–14 mm/s) of ferrofluid or a finite height cylinder of ferrofluid with no cover (1–4 mm/s) placed in the spherical coil apparatus. The flow is due to free surface effects and the non-uniform magnetic field associated with the shape demagnetizing effects. Flow is also observed in the fully filled ferrofluid sphere (1–20 mm/s) when the field is made non-uniform by adding a permanent magnet or a DC or AC excited small solenoidal coil. This confirms that a non-uniform magnetic field or a non-uniform distribution of magnetization due to a non-uniform magnetic field are causes of spin-up flow in ferrofluids with no free surface, while tangential magnetic surface stress contributes to flow in the presence of a free surface. Recent work has fitted velocity flow measurements of ferrofluid filled finite height cylinders with no free surface, subjected to uniform rotating magnetic fields, neglecting the container shape effects which cause non-uniform demagnetizing fields, and resulting in much larger non-physical effective values of spin viscosity η′∼10−8−10−12 N s than those obtained from theoretical spin diffusion analysis where η′≤10−18 N s. COMSOL Multiphysics finite element computer simulations of spherical geometry in a uniform rotating magnetic field using non-physically large experimental fit values of spin viscosity η′∼10−8−10−12 N s with a zero spin-velocity boundary condition at the outer wall predicts measureable flow, while simulations setting spin viscosity to zero (η′=0) results in negligible flow, in agreement with the ultrasound velocimetry measurements. COMSOL simulations also confirm that a non-uniform rotating magnetic field or a uniform rotating magnetic field with a non-uniform distribution of magnetization due to an external magnet or a current carrying coil can drive a measureable flow in an infinitely long ferrofluid cylinder with zero spin viscosity (η′=0)." @default.
• W2031544963 created "2016-06-24" @default.
• W2031544963 creator A5053743388 @default.
• W2031544963 creator A5083954682 @default.
• W2031544963 date "2011-05-01" @default.
• W2031544963 modified "2023-09-30" @default.
• W2031544963 title "Ultrasound velocimetry of ferrofluid spin-up flow measurements using a spherical coil assembly to impose a uniform rotating magnetic field" @default.
• W2031544963 cites W1998767925 @default.
• W2031544963 cites W2013727158 @default.
• W2031544963 cites W2028922858 @default.
• W2031544963 cites W2033223524 @default.
• W2031544963 cites W2061978585 @default.
• W2031544963 cites W2085620180 @default.
• W2031544963 cites W2150608638 @default.
• W2031544963 cites W4249124549 @default.
• W2031544963 doi "https://doi.org/10.1016/j.jmmm.2010.11.035" @default.
• W2031544963 hasPublicationYear "2011" @default.
• W2031544963 type Work @default.
• W2031544963 sameAs 2031544963 @default.
• W2031544963 citedByCount "22" @default.
• W2031544963 countsByYear W20315449632012 @default.
• W2031544963 countsByYear W20315449632013 @default.
• W2031544963 countsByYear W20315449632014 @default.
• W2031544963 countsByYear W20315449632016 @default.
• W2031544963 countsByYear W20315449632017 @default.
• W2031544963 countsByYear W20315449632018 @default.
• W2031544963 countsByYear W20315449632020 @default.
• W2031544963 countsByYear W20315449632023 @default.
• W2031544963 crossrefType "journal-article" @default.
• W2031544963 hasAuthorship W2031544963A5053743388 @default.
• W2031544963 hasAuthorship W2031544963A5083954682 @default.
• W2031544963 hasConcept C115260700 @default.
• W2031544963 hasConcept C121332964 @default.
• W2031544963 hasConcept C168589914 @default.
• W2031544963 hasConcept C192562407 @default.
• W2031544963 hasConcept C26873012 @default.
• W2031544963 hasConcept C32546565 @default.
• W2031544963 hasConcept C46141821 @default.
• W2031544963 hasConcept C57879066 @default.
• W2031544963 hasConcept C60434167 @default.
• W2031544963 hasConcept C62520636 @default.
• W2031544963 hasConceptScore W2031544963C115260700 @default.
• W2031544963 hasConceptScore W2031544963C121332964 @default.
• W2031544963 hasConceptScore W2031544963C168589914 @default.
• W2031544963 hasConceptScore W2031544963C192562407 @default.
• W2031544963 hasConceptScore W2031544963C26873012 @default.
• W2031544963 hasConceptScore W2031544963C32546565 @default.
• W2031544963 hasConceptScore W2031544963C46141821 @default.
• W2031544963 hasConceptScore W2031544963C57879066 @default.
• W2031544963 hasConceptScore W2031544963C60434167 @default.
• W2031544963 hasConceptScore W2031544963C62520636 @default.
• W2031544963 hasIssue "10" @default.
• W2031544963 hasLocation W20315449631 @default.
• W2031544963 hasOpenAccess W2031544963 @default.
• W2031544963 hasPrimaryLocation W20315449631 @default.
• W2031544963 hasRelatedWork W1995424774 @default.
• W2031544963 hasRelatedWork W2008703925 @default.
• W2031544963 hasRelatedWork W2019101842 @default.
• W2031544963 hasRelatedWork W2049302239 @default.
• W2031544963 hasRelatedWork W2057077438 @default.
• W2031544963 hasRelatedWork W2065617652 @default.
• W2031544963 hasRelatedWork W2094794530 @default.
• W2031544963 hasRelatedWork W2106461167 @default.
• W2031544963 hasRelatedWork W2156253822 @default.
• W2031544963 hasRelatedWork W4285297155 @default.
• W2031544963 hasVolume "323" @default.
• W2031544963 isParatext "false" @default.
• W2031544963 isRetracted "false" @default.
• W2031544963 magId "2031544963" @default.
• W2031544963 workType "article" @default.