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SUMMARY:From Theory to Reality: Ultrasonic Characterisation of Complex Mat
 erials - Valerie Pinfield (Loughborough University)\, Megan Povey (Univers
 ity of Leeds)
DTSTART:20230113T144500Z
DTEND:20230113T154500Z
UID:TALK193151@talks.cam.ac.uk
DESCRIPTION:Dr Valerie Pinfield (Loughborough University) and Prof Megan P
 ovey (University of Leeds)\nMathematical theories of multiple wave scatter
 ing of necessity make simplifications and assumptions in order to render a
  system tractable. For example\, we might construct a semi-infinite half-s
 pace with randomly distributed identical point scatterers. In reality\, ho
 wever\, we want to use multiple wave scattering theories to enable us to i
 nvestigate rather more complex systems than these simplified theoretical p
 ropositions. Here we present the use of ultrasonic measurements to explore
  the properties of complex materials such as emulsions\, suspensions of so
 lid particles\, and crystallising fats or pharmaceutical ingredients. We w
 ill show how multiple wave scattering theories can be used to interpret ex
 perimental measurements and their power in studying system behaviour. We w
 ill highlight some of the differences between the theoretical constructs o
 f scattering models and experimental reality\, for example the use of a fi
 nite source\, a finite system (boundaries)\, finite signal duration\, time
 -averaging\, spatial averaging and phase sensitivity of the detector among
 st others.
LOCATION:Seminar Room 1\, Newton Institute
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