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In-line rheometry of particulate suspensions by pulsed ultrasound velocimetry combined with pressure difference method

Wiklund, Johan (författare)
RISE,Lund University,Lunds universitet,Livsmedelsteknik,Avdelningen för livsmedel och läkemedel,Institutionen för processteknik och tillämpad biovetenskap,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Food Technology, Engineering and Nutrition,Division of Food and Pharma,Department of Process and Life Science Engineering,Departments at LTH,Faculty of Engineering, LTH,SIK – Institutet för livsmedel och bioteknik,Lund University, Sweden
Birkhofer, B. (författare)
Sika Services AG, Switzerland; ETH Zurich, Switzerland
Jeelani, S. A. K. (författare)
ETH Zurich, Switzerland
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Stading, Mats, 1962 (författare)
RISE,SIK – Institutet för livsmedel och bioteknik,Chalmers University of Technology, Sweden
Windhab, E. J. (författare)
ETH Zurich, Switzerland
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 (creator_code:org_t)
2012
2012
Engelska.
Ingår i: Applied Rheology. - 1617-8106 .- 1430-6395. ; 22:4, s. Article Number: 42232-5
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • The in-line rheometer concept based on the combination of the ultrasonic velocity profiling (UVP) technique and pressure difference (PD) measurements was utilized for investigating the influence of particle concentration and size distribution on the rheology of particulate suspensions in pipe flow under realistic industrial process conditions. Well defined model suspensions were used, consisting of 11 mu m and 90 mu m diameter polyamide particles suspended in rapeseed oil at concentrations ranging from 1 to 25 % by volume. The variation of concentration and particle size distribution had the expected effects on the shear viscositiy of the investigated uni-modal and bimodal suspensions. The in-line results showed that the investigated suspensions exhibit Sisko flow behavior and demonstrated that the UVP+PD method can be used to determine the flow behavior of complex fluids and suspensions, even at high solid concentrations, under industrial conditions in-line. The obtained in-line results were in good agreement with measurement data obtained using a conventional rotational controlled-stress rheometer. Limitations of commercially available transducer technology were identified and other possible sources of inaccuracy of the UVP+PD method were investigated. Several improvements of the UVP+PD measurement method were proposed.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Materials Engineering (hsv//eng)
TEKNIK OCH TEKNOLOGIER  -- Annan teknik -- Livsmedelsteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Other Engineering and Technologies -- Food Engineering (hsv//eng)
LANTBRUKSVETENSKAPER  -- Lantbruksvetenskap, skogsbruk och fiske -- Livsmedelsvetenskap (hsv//swe)
AGRICULTURAL SCIENCES  -- Agriculture, Forestry and Fisheries -- Food Science (hsv//eng)

Nyckelord

bimodal suspensions
rheological characterization
wall shear rate
concentrated suspensions
bimodal suspensions
particle
velocity profiles
in-line rheology
flow
doppler ultrasound
viscosity
velocity profiles
signals
particulate suspensions
in-line rheology
particulate suspensions
bimodal suspensions
velocity
profiles

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