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Showing 1 to 20 of 168 for “"rheometer"”.
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The Design and Analysis of a Micro Squeeze Flow Rheometer
… the analysis and design of a micro squeeze flow rheometer. The need to analyse the rheology of complex liquids occurs regularly in industry and during research. However, frequently the amount of fluid available is too small, precluding the use of conventional rheometers. Conventional rheometers …
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Electro-Mechanical Design and Testing of a Prototype Low-Cost Rheometer
… to design an accurate but low-cost (<$200) rheometer using fused deposition modeling 3-dimensional printing (FDM 3D printing) and off-the-shelf components. Both designs utilized a cylinder rotating concentrically inside a cylindrical cup of sample fluid. The first prototype used an encoded …
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Design and Development of a Squeeze-Mode Rheometer for Evaluating Magneto-Rheological Fluids
… mode through the use of a custom designed rheometer. Squeeze mode is the least understood of the three operational modes of MR fluid and thus its potential has yet to be realized in practical applications. By identifying the behavior of MR fluid in this mode, the foundation for future …
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Mini-Portable Rheometer: A device for the on-site rheological characterization of viscoelastic fluids
… applications. Typically, laboratory-based rheometers are used to characterize rheological properties of fluids, which include, elasticity, relaxation time, and shear viscosity. However, this can be challenging as some samples, in particular biological fluids, may degrade over time and …
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Transient Shear Flow Rheology of Concentrated Long Glass Fiber Suspensions in a Sliding Plate Rheometer
… is the neutral direction. A sliding plate rheometer incorporating a shear stress transducer was constructed in the lab. It was shown that this device works well for the tested materials including a Newtonian oil, a low density polyethylene (LDPE) and short glass fiber-filled polypropylene. …
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Rheological characterization of lubricants in automotive industries through development of a novel capillary breakup extensional rheometer
… design of the Capillary Breakup Extensional Rheometer (CaBER) is introduced. The new instrument features higher resolution and faster sampling of the laser micrometer measurements, better controlled motor actuation, a novel environmental temperature control system as well as customized …
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Using a Sliding Plate Rheometer to Obtain Material Parameters for Simulating Long Fiber Orientation in Injection Molded Composites
… the material parameters using a sliding plate rheometer to measure the rheology of fiber suspensions at increased fiber lengths subjected to transient shear flow. Fiber orientation was measured in conjunction with shear stress to determine the relationship between stress and fiber orientation. …
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Assessing an Orientation Model and Stress Tensor for Semi-Flexible Glass Fibers in Polypropylene Using a Sliding Plate Rheometer: for the Use of Simulating Processes
… stress data obtained using a sliding plate rheometer. Results showed the semi-flexible orientation model and stress tensor combination, overall, provided improved rheological results as compared to the Folgar-Tucker model when coupled with the stress tensor of Lipscomb (1988). Furthermore, …
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Comparative Study of the Effects of Physical and Chemical Aging on Extracted and Recovered Asphalt Binders from Some Municipal and Provincial Roads in Canada
… Superpave® methods such as Dynamic Shear Rheometer (DSR) and Bending Beam Rheometer (BBR) and the improved Ministry of Transportation of Ontario methods (LS-308 Extended Bending Beam Rheometer (eBBR) and LS-299 Double-Edge Notched Tension (DENT) test). Chemical test methods like Fourier …
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A methodology for coupled CFD-DEM modeling of particulate suspension rheology
… properties, commonly employing devices such as rheometers to measure fluid properties under different conditions. A numerical model that is able to simulate the real-world interactions that determine particulate suspension rheology would complement those experimental studies. Accordingly, this …
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Extensional rheology of bread dough
… of wheat flour dough on the Filament Stretching Rheometer (FISER), in which the sample approaches uniform uni-axial extension flow at a constant strain rate over a large portion of the experiment, thereby allowing us to directly probe the transient material function characterizing the behavior of …
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Analysis and Control of Rate and Uniformity for Granular Fertilizer Application Systems
… tube method discussed in this paper and a rheometer method. In the latter method, the particles are fixed in placeholders, and a spinning disc is kept in contact with them under a controlled normal force. The measured torque on the disc is then a measure for the friction coefficient. Data …
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INVESTIGATING RHEOLOGICAL TECHNIQUES TO MODEL AND PREDICT OPERATING CONDITIONS OF A SINGLE SCREW EXTRUDER WITH INTERNAL RESTRICTIONS
… Investigations on use of an off-line capillary rheometer to model apparent viscosity of full fat soy flours revealed inability of the capillary rheometer to handle food/biological materials high in oil content (20%) at high temperature (80C) and low moisture content (15% wet basis). The lack …
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Comparison of in-place versus laboratory binder properties of asphalt
… Absolute Viscosity, Penetration, Bending Beam Rheometer creep stiffness, Bending Beam Rheometer m-value and Direct Tension failure strain. The data for the study were collected from Clark County Public Works project files. The comparisons showed that: (1) there was no difference between the …
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On-line shear and extensional rheometry of polymer melts in the extrusion process.
A novel on-line capillary rheometer (OLR) was used to examine the shear and extensional characteristics of polyolefin melts during twin screw extrusion (TSE). Comparisons with off-line rheometry were made using a twin-bore capillary rheometer and a modular in-line slit die rheometer (ILR) provided …
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On-line shear and extensional rheometry of polymer melts in the extrusion process.
A novel on‑line capillary rheometer (OLR) was used to examine the shear and extensional characteristics of polyolefin melts during twin screw extrusion (TSE). Comparisons with off‑line rheometry were made using a twin‑bore capillary rheometer and a modular in‑line slit die rheometer (ILR) provided …
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Real-time rheological investigation of complex behaviour in cornstarch suspensions
… In this thesis, the design of a novel custom rheometer for the investigation of these suspensions is described. The results of applying the custom rheometer are shown and analysed in the context of the popular Wyart-Cates model of jamming suspensions. The work confirms the presence of unsteady …
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Development of Antioxidant Treatments for Asphalt Binders and Mixtures
… Rheological measurements using the Dynamic Shear Rheometer and the Bending Beam Rheometer were used to screen those antioxidants showing the most promise. Asphalt concrete mixtures containing the most promising antioxidants were fabricated and subjected to a battery of laboratory mixture tests …
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EVALUATION OF PHASE ANGLE AS A PRACTICAL PARAMETER FOR LOW TEMPERATURE SPECIFICATION GRADING OF ASPHALT BINDERS
… performance tests such as the bending beam rheometer (BBR) and extended BBR (EBBR) tests are not without limitations. They could be time-consuming and require more sample quantity even though they are rigorous and accurate. Hence, this study aims to examine the viability of limiting phase …
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