Viscosimétrie ultrasonore ultra large bande

Abstract : The main goal of this thesis is to set specific piezoelectric elements emitting longitudinal waves (L) on a well-known container in the field of biomedical and chemistry (a test tube) and to implement with some optimizations various ultrasonic methods to measure viscosities quickly, without changing the measurement bench. The measurement has to be done from a few Hz to several tens of megahertz around room temperature. Up to now it is possible to determine in a few minutes the rheological behavior of the liquid studied thanks to the evaluation of its shear viscosity. Furthermore, the viscosity range reached is extremely wide: the measurements are possible from a few tens of mPa.s to several hundred Pa.s. Finally, beyond quantitative results in terms of viscosity, the measurement bench can also be used to qualitatively monitor reactions (polymerization for example).
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Mohamed Abderrahmane Mograne. Viscosimétrie ultrasonore ultra large bande. Autre. Université Montpellier, 2018. Français. ⟨NNT : 2018MONTS089⟩. ⟨tel-02139470⟩

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