Topic
Rheometer
About: Rheometer is a research topic. Over the lifetime, 5759 publications have been published within this topic receiving 125849 citations.
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TL;DR: In this paper, the effects of adding three commercial waxes and a polyphosphoric acid to three bitumens of 160/220 penetration grade were studied using different types of laboratory equipment, such as dynamic shear rheometer (DSR), bending beam rheometers (BBR), differential scanning calorimeter (DSC), force ductilometer (FD) as well as equipment for determining conventional parameters like penetration, softening point and Fraass breaking point.
152 citations
TL;DR: In this article, the impact of various fillers on paste rheological behaviors in a steady-state and dynamic rheology test was analyzed for screenprinting pastes and self-prepared pastes.
151 citations
TL;DR: Capillary thinning rheometry (CaBER) is used to characterize the relaxation times and apparent extensional viscosities of the semidilute cellulose solutions in a uniaxial extensional flow that mimics the dynamics encountered in the spin-line during fiber spinning processes.
151 citations
TL;DR: In this paper, the importance of viscoelastic properties of the membrane on the motion of a capsule freely suspended in a viscous liquid subjected to shear flow is assessed, and it is predicted that the deformation reaches a maximum value, which is consistent with experimental observations of red blood cells.
Abstract: Red blood cells or artificial vesicles may be conveniently represented by capsules, i.e. liquid droplets surrounded by deformable membranes. The aim of this paper is to assess the importance of viscoelastic properties of the membrane on the motion of a capsule freely suspended in a viscous liquid subjected to shear flow. A regular perturbation solution of the general problem is obtained when the particle is initially spherical and undergoing small deformations. With a purely viscous membrane (infinite relaxation time) the capsule deforms into an ellipsoid and has a continuous flipping motion. When the membrane relaxation time is of the same order as the shear time, the particle reaches a steady ellipsoidal shape which is oriented with respect to streamlines at an angle that varies between 45° and 0°, and decreases with increasing shear rates. Furthermore it is predicted that the deformation reaches a maximum value, which is consistent with experimental observations of red blood cells.
151 citations
TL;DR: In this paper, an overview of this type of test is presented, by examining in detail experimental results, elastoplastic finite elements simulations and visco-plastic fluid dynamic simulations in the specific case of penetrometer test, it is demonstrated that there exists a systematic correlation between these test results and the yield stress of the tested material.
151 citations