نتایج جستجو برای: rheometry

تعداد نتایج: 530  

Journal: :Chemical communications 2014
Fuhua Luo Zhifeng Cheng Man Wang Gaojian Chen Zexin Zhang

We report a novel method to prepare soft colloids with well-controlled softness. The softness of the colloids was characterised by atomic force microscopy and rheometry. Possible applications of such soft colloids in uniform particle coatings are demonstrated.

Journal: :Applied biochemistry and biotechnology 2010
M R Ehrhardt T O Monz T W Root R K Connelly C T Scott D J Klingenberg

The rheological properties of acid hydrolyzed corn stover at high solids concentration (20-35 wt.%) were investigated using torque rheometry. These materials are yield stress fluids whose rheological properties can be well represented by the Bingham model. Yield stresses increase with increasing solids concentration and decrease with increasing hydrolysis reaction temperature, acid concentratio...

Journal: :Nihon Reoroji Gakkaishi 2018

2015
D. Cheneler

In this paper, the design, fabrication and experimental analysis of a piezoelectrically actuated micro squeeze flow rheometer is presented. Being only 30x30x0.5 mm in size, the micro rheometer is sensitive to very small volumes of the order of 1-10 nano-litre of liquid and light enough to operate at frequencies in the kHz regime, an order of magnitude higher than normally attainable with conven...

Journal: :Ultrasonics 2006
David M Pfund Margaret S Greenwood Judith A Bamberger Richard A Pappas

This will be a discussion of the non-invasive determination of the viscosity of a non-Newtonian fluid in laminar pipe flow over the range of shear rates present in the pipe. The procedure used requires knowledge of the flow profile in and the pressure drop along a long straight run of pipe. The profile is determined by using a pulsed ultrasonic Doppler velocimeter. This approach is ideal for ma...

2001
Gareth H. McKinley Tamarapu Sridhar

■ Abstract Filament-stretching rheometers are devices for measuring the extensional viscosity of moderately viscous non-Newtonian fluids such as polymer solutions. In these devices, a cylindrical liquid bridge is initially formed between two circular end-plates. The plates are then moved apart in a prescribed manner such that the fluid sample is subjected to a strong extensional deformation. As...

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