111results about "Flow properties on non-Newtonian fluids" patented technology

As system for measuring drilling fluid properties includes a capillary rheometer that is adapted to measure viscosity parameters of drilling fluid. The capillary rheometer includes a feed chamber, the feed chamber having a cavity, at least a first drain port for draining fluid out of the cavity, a double wall defining an annulus that opens to the cavity, and a feed port in an outer portion of the double wall that is in fluid communication with the annulus. The capillary rheometer also includes at least a first capillary tube coupled to at least the first drain port. Additionally, the disclosed system further includes a pump that is adapted to pump fluid to the feed port.

A rheometer apparatus includes an acoustic wave viscosity sensor associated with a flexural plate wave device configured to include a central cavity through which a fluid flows. A plurality of interdigital transducers cam be associated with the flexural plate wave device, wherein each interdigital transducer (IDT) thereof can measure viscosity associated with the fluid over a variable range of shear rates. The variable range of shear rates can be achieved by varying the flow rate of the fluid due to an adjustment of a vibrating amplitude associated with the flexural plate wave (FPW) device (e.g., an FPW pump).

The invention relates to a rheometer, comprising a rotatable shaft (1), to which a rotor plate (2) is fixed, and a measuring device (10), for measuring torques exerted on the rotor plate (2) by a substance under investigation during a rotation of the shaft (1), wherein a first measuring gap (5), for accommodating the substance (6) under investigation, is formed between a first side (3) of the rotor plate (2) and a first shear surface (4) and a second measuring gap (9), for accommodating the substance (6) under investigation, is formed between a second side (7) of the rotor plate (2) away fromthe first and a second shear surface (8). The rheometer contains a magnet for generating a magnetic field in the first and second measuring gaps (5, 9).

The invention relates to a concrete workability rapid recovery system. The concrete workability rapid recovery system comprises a workability induction device, a stirring device and an additive automatic spraying device. The system is arranged between a concrete tank truck discharging opening and a concrete pump feeding opening, through the workability induction device, the yield stress and the plastic viscosity of the concrete are measured in real time to judge the concrete workability, data are transmitted to a controller, according to the mixture state, the rotating speed of a stirring blade and the mixing amount of the additive are adjusted in real time, and the concrete workability is rapidly recovered within 15 seconds. The workability rapid recovery system has the advantages of being intelligent, rapid and wide in optimization, the problem that in the construction site, water is added at will can be thoroughly solved, and concrete engineering high-quality construction under adverse factors such as raw material quality fluctuation, environment temperature change and long-distance transportation can be effectively ensured.

Method and apparatus are disclosed for measuring an apparent viscosity of a non-Newtonian fluid. The method and apparatus involves calculating a power-law number n relating a shear stress of the fluid to a shear rate of the fluid, and then calculating an estimated apparent viscosity η_est of the fluid at a selected shear rate based on a yield stress Y of the fluid and on the calculated power-law number n. The estimated apparent viscosity of the fluid at a selected shear rate is calculated based on the experimental observation that reference shear stress is 1.5 times the yield stress for most shear thinning fluids (e.g., grease).

A method and means for determining a critical elongation strain rate of a polymer melt, which make it possible to subject a polymer melt to elongation to prepare a bulk oriented melt, are established, and a process for producing bulk polymer oriented crystals and polymer oriented crystals are provided. In the critical elongation strain rate determination process or critical elongation strain rate determining method, a polymer melt (3) in a disc shape having a radius x₀ and a thickness of Δz₀ is held between transparent plates (an upper transparent plate (1) and a lower transparent plate (2)). The polymer melt (3) is cooled to a supercooled state and is press in a thickness direction at a constant rate v by using the transparent plates. The critical point radius x*, at which the polymer melt (3) is turned to an oriented crystal, is measured, and the critical elongation strain rate ε is calculated by equation ε=ax*³ wherein α=v/(2Δz₀x₀³)

The invention relates to a method for testing the vibration rheological property of cement mortar. Frequency conversion vibration equipment is combined with a rheometer to test the rheological property of the cement mortar. In the test method, the composition, vibration frequency range and vibration amplitude of the frequency conversion vibration equipment are defined. The rheometer has the characteristics of rotor rotation speed, torque, resolution, and sample volume suitable for evaluation of mortar rheological property. According to the method for testing the vibration and rheological properties of the cement mortar provided by the invention, the matching simulation of the frequency conversion vibration equipment for the vibration compaction process and the advantage of the rheometer inaccurate evaluation of the rheological properties of the cement mortar are combined; based on the practice of compaction of the cement mortar, the rheological behavior of the cement mortar under thevibration state is accurately evaluated; and an important basis is provided for optimization and control of the working performance.

A viscometer comprises a plurality of capillary tubes connected in series with a mass flow meter. The capillary tubes are smooth, straight, and unimpeded, and each has a different known, constant diameter. Differential pressure transducers sense differential pressure across measurement lengths of each capillary tube, and the mass flow meter senses fluid mass flow rate and fluid density. A data processor connected to the mass flow meter and the differential pressure transducers computes viscosity parameters of fluid flowing through the viscometer using non-Newtonian fluid models, based on the known, constant diameters and measurement lengths of each capillary tube, the sensed differential pressures across each measurement length, the fluid mass flow rate, and the fluid density.

A compression test rig apparatus for determining a mechanical characterization of a gel-based LCM test sample comprising an LCM test cell configured to contain the gel-based LCM test sample, the LCM test cell comprising a cylinder wall defining a cell space volume configured to hold the gel-based LCM test sample, and a floor defining an extrusion hole configured to extrude the gel-based LCM test sample to create an extruded gel; an extruded gel collector configured to receive the extruded gel from the extrusion hole as an extruded gel volume; a perforated disc comprising perforations, wherein the perforated disc is configured to allow the gel-based LCM test sample to pass through the perforations; and a flat foot disc piston in flush contact with the cylinder wall, the flat foot disc piston configured to compress the gel-based LCM test sample at a displacement speed to produce compression data.

A viscometer includes a viscosity sensor with a liquid flow channel and at least two pressure sensors positioned along the liquid flow channel and configured to measure a pressure drop of a liquid flowing through the liquid flow channel, and a dispensing mechanism configured to cause dispensing of a liquid from the syringe to the viscosity sensor at a known flow rate. The dispensing mechanism and the viscosity sensor are configured to couple with a syringe configured to contain a liquid. The viscometer further includes an electronic controller configured to control operations of the dispensing mechanism and receive and process data from the viscosity sensor. The viscometer includes a sample loading interface, included in the syringe, through which the viscometer is configured to receive the liquid. The sample loading interface includes a selection valve coupled with, and located between, the viscosity sensor and the syringe.

Method and apparatus are disclosed for estimating an apparent viscosity of a non-Newtonian fluid. The results may be used for selecting equipment for pumping systems.

A method is provided to determine the predisposition of a polymer to form network or gel in a lubricating oil which comprises obtaining a composition of a polymer in a diluent, measuring the shear stress as a function of shear rate, determining the yield stress using the Herschel-Bulkley equation and assessing the yield stress. A method is also provided to determine the predisposition of a polymer to form network or gel in a lubricating oil which comprises obtaining a composition of a polymer in a diluent, determining at least one of (i) the storage modulus G′ and loss modulus G″ of the composition by subjecting the composition to sinusoidal (oscillating) stress or strain of certain amplitude and frequency, (ii) the phase lag (angle) of the response strain or stress δ, or (iii) the tangent (tan) δ, and (c) assessing at least one of the G′, G″, δ, or tan(δ) determined.

The invention relates to a determination apparatus and determination method of flowability of coal water slurry based on digital image technology. The determination apparatus is characterized by comprising a pedestal, a charging tray, a vertical support, a robotic arm guide rail, a power apparatus, a robotic arm clamping device, a container, a shooting device and a control apparatus. The top of the pedestal is provided with a groove, the charging tray for loading released coal water slurry is fixed in the groove, the vertical support is fixed at one side of the top of the pedestal, and the robotic arm guide rail is in slide arrangement with the vertical support and is in fixed connection to an output end of the power apparatus. One end of the robotic arm clamping device is in fixed connection to the robotic arm guide rail, and the other end of the robotic arm clamping device clamps and fixes the container for holding coal water slurry. The shooting apparatus is in fixed connection to the vertical support and is in electrical connection to the control apparatus fixed on the vertical support. The determination apparatus and determination method can be widely applied to quantitative and qualitative determination process of flowability of coal water slurry.

The present disclosure provides improved viscosity measuring assemblies, and related methods of use. More particularly, the present disclosure provides advantageous measuring assemblies configured to measure the viscosity of samples/fluids (e.g., opaque or transparent liquids) using microchannels. The present disclosure provides for a viscosity measuring assembly (e.g., hand-held electronic measuring assembly) that is configured to measure the viscosity of samples/fluids (e.g., opaque or transparent Newtonian and non-Newtonian liquids, including blood, etc.), in a short period of time (e.g., within a couple of minutes) utilizing only about a droplet of fluid. The viscosity measuring assembly can include a substrate having a microchannel, a light source (e.g., a collimated low coherence light source), and a sensor (e.g., photodiode). The micro-channeled substrate may be disposable, and some of the other components may be reusable since they are substantially not directly exposed to the sample during operation of the viscosity measuring assembly.

The embodiment of the invention provides an end face effect error elimination method and device for measuring the apparent viscosity of non-Newtonian fluid. At least four groups of measured data of fluid to be measured are measured by using a coaxial double-cylinder rheometer, and linear fitting is performed according to the measured four groups of measured data and a theoretical linear function model to obtain a correlation coefficient after the linear fitting; and when the correlation coefficient of the linear fitting is greater than a preset correlation coefficient, an additional height ofan inner cylinder measured by the coaxial double-cylinder rheometer is calculated by an intercept and a slope of the theoretical linear function model, and a viscosity value in the fluid to be measured after end face effect errors are corrected is determined according to the calculated additional height of the inner cylinder, geometric parameters of the coaxial double-cylinder rheometer, running parameters of the coaxial double-cylinder rheometer and the measured data. The end face effect error elimination method for measuring the apparent viscosity of non-Newtonian fluid provided by the embodiment of the invention has higher operability and better practicality, accuracy, and efficiency.