oscillatory shear

[′äs·ə·lə‚tȯr·ē ′shir]

(fluid mechanics)

Application of small-amplitude oscillations to produce shear in viscoelastic fluids for the study of dynamic viscosity.

References in periodicals archive ?

Small-amplitude oscillatory shear (SAOS) measurements were implemented at 200[degrees]C in the oscillatory shear mode using the 25-mm parallel plate geometry; the gap was set at 1 mm, and frequency sweeps ranging from 0.01 to 100 rad/s were performed at 1 % strain to maintain the experiment within the linear viscoelastic domain.

Viscoelastic Behavior and Constitutive Modeling of PP/HNT Composites Prepared by Water-Assisted Extrusion

Bailly, "The potential of large amplitude oscillatory shear to gain an insight into the long-chain branching structure of polymers, "In: The 235th ACS National Meeting (2008), polymer preprints, ACS, vol.

Rheological characterization of mixing effects on natural rubber using an RPA

The scientists determined rheological properties using strain sweeps, frequency sweeps and large amplitude oscillatory shear (LAOS) measurements.

Better understand effects of fat content on structure-function relationships in Cheddar cheese

Figure 9 presents time-averaged wall shear stress (TAWSS), and Figure 10 presents the oscillatory shear index (OSI) distribution in the five models.

Biomechanical Aspects of Closing Approaches in Postcarotid Endarterectomy

Nehdi and Martini [17] studied the effects of the mixing time and temperature on the yield stress of cemented pastes incorporating various super plasticizers, where the yield stress was characterized by the oscillatory shear test.

Temperature Effects on Rheological Properties of Fresh Thickened Copper Tailings that Contain Cement

Oscillatory shear measurements of equilibrium water-swollen hydrogel materials offer frequency dependences of G' and G" (Figures 8 and 9).

Embedding of Bacterial Cellulose Nanofibers within PHEMA Hydrogel Matrices: Tunable Stiffness Composites with Potential for Biomedical Applications

Abbreviations CA: Carotid artery LCA: Left carotid artery RCA: Right carotid artery WSS: Wall shear stress EC: Endothelial cell DH: Dominant harmonic ICA: Internal carotid artery CT: Computerised tomography MRI: Magnetic resonance imaging TAWSS: Time averaged wall shear stress OSI: Oscillatory shear index WSST: Temporal gradient of WSS.

Assessment of Influences of Stenoses in Right Carotid Artery on Left Carotid Artery Using Wall Stress Marker

The highest oscillatory nature was confined to the outer wall of the LCX, and the highly restricted distributions of flow and oscillatory shear stress along the walls firmly corresponded with the principal locations of atheroma in the left coronary artery; hence, the rates of atherosclerosis in LCX are, in theory, higher.

Intravascular Ultrasound Classification of Plaque in Angiographic True Bifurcation Lesions of the Left Main Coronary Artery

Measurements with a 10W30 engine oil showed that cold lubricant is a viscoelastic medium that exhibits both a storage (elastic) modulus and a loss (viscous) modulus when submitted to a small oscillatory shear rate.

Estimation of oil supply time during engine start-up at very low temperatures

The oscillatory shear index was defined as follows: |retrograde shear|/(antegrade shear + |retrograde shear|) (22).

Effects of disturbed blood flow during exercise on endothelial function: a time course analysis

Using this technique, stable lesions develop distal to the cast under conditions of oscillatory shear stress, whereas vulnerable lesions (containing a small amount of collagen) develop proximal to the cast due to a low shear stress.

Overexpression of Prolyl-4-hydroxylase-[alpha]1 stabilizes but increases shear stress-induced atherosclerotic plaque in apolipoprotein E-deficient mice

Three oil-in-water cosmetic emulsions were studied using simple and oscillatory shear rheological tests.

The influence of emulsifier on rheological and sensory properties of cosmetic lotions