کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9675541 1454099 2005 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High-frequency ultrasonic imaging: A spatio-temporal approach of rheology
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
High-frequency ultrasonic imaging: A spatio-temporal approach of rheology
چکیده انگلیسی
We describe how high-frequency ultrasound can be used to measure and follow velocity profiles in complex fluids sheared in the Couette geometry with a 0.5-1 mm gap. The technique provides a spatial resolution of 40 μ m and velocity profiles can be recorded every second typically. Such ultrasonic velocimetry is coupled to a standard rheometer. The resulting “ultrasonic rheo-velocimeter” is tested on various complex fluids that display both inhomogeneous velocity profiles and temporal fluctuations close to a shear-induced transition: a lamellar phase, a triblock copolymer, a concentrated emulsion, and an organogel.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volumes 270–271, 1 December 2005, Pages 195-204
نویسندگان
, , , ,