555 results about "Newtonian fluid" patented technology

The invention discloses an ultra-precise curved surface finishing method based on non-Newtonian fluid shear thickening effect. The method includes: adding abrasive particles or micropowder into non-Newtonian fluid with shear thickening effect to prepare non-Newtonian fluid polishing solution, wherein the non-Newtonian fluid accounts for 50%-90% of the mass of the polishing solution, the abrasive particles or the micropowder account for 10%-50% of the mass of the polishing solution, and the particle size of the abrasive particles or the micropowder ranges from 0.05 micrometer to 50 micrometers. Relative motion is generated between a workpiece and the polishing solution during polishing, shear thickening is generated at a contact portion of the polishing solution and the workpiece under shearing action, viscosity of the polishing solution in the contact area is increased to enhance holding force to the abrasive particles or the micropowder, and removal of workpiece surface materials is achieved under the micro cutting or chemical mechanical action of the adding abrasive particles or micropowder with polishing effect in the polishing solution on the workpiece, so that polishing of the workpiece surface is achieved. The ultra-precise curved surface finishing method based on the non-Newtonian fluid shear thickening effect can achieve efficient and high-quality polishing to various curved surfaces, in particular to complex curved surfaces and has great economic and social benefits.

The invention relates to processing crustaceans such as krill to oils comprising phospholipids that are Newtonian fluids and/or and have low viscosity, and in particular to the production of oils containing astaxanthin and phospholipids that show Newtonian fluidity and have a low viscosity.

Methods and related apparatus embodiments are disclosed that allow novel Conformal Vortex Generator and/or Elastomeric Vortex Generator art to improve energy efficiency and control capabilities at many surface points of a body or object moving at speed in aero/hydrodynamic Newtonian fluids, by reducing; shock energy losses, surface flow turbulence, and/or momentum layer thicknesses.

The present invention is directed to methods for densifying cement spacer fluids for use in conjunction with drilling fluids and cement slurries for cementing operations involving oil and gas wells, wherein such densifying is done via the addition of nanoparticles to the spacer fluid. The present invention is also directed to analogous methods of densifying completion spacer fluids using nanoparticles, to Newtonian fluid compositions resulting from any such fluid densification, and to systems for implementing the use of such compositions in well cementing operations.

Occlusion devices, earpiece devices and methods of forming occlusion devices are provided. An occlusion device is configured to occlude an ear canal, but other biological and non-biological conduits or chambers can be occluded using the devices and methods herein. The occlusion device includes an insertion element and at least one occluding member or element (which can be expandable) disposed on the insertion element. The occluding member is configured to receive a medium via the insertion element and is configured to expand, responsive to the medium, to contact the ear canal. Alternatively, the occluding member is made of a non-Newtonian fluid and can be enclosed by a balloon or not. Physical parameters of the occlusion device are selected to produce a predetermined sound attenuation characteristic over a frequency band. Use of a non-Newtonian fluid provides additional options or variables in customizing or designing a predetermined sound attenuation characteristic.

By use of the vias a microfluidic autoregulator is fabricated comprising an origin of a fluid, a sink for the fluid, a main flow channel coupling the origin and the sink, a valve communicated to the main flow channel to selectively control flow of fluid therethrough, and means dependent on flow through the main flow channel for creating a pressure differential across the valve to at least partially activate the valve to control flow of fluid through the main flow channel. The means for dependent on flow for creating a pressure differential comprises either a dead-end detour channel from the flow channel to the valve, or a loop channel fed back to the control chamber of the valve.

An ultrasonic control shear thickening and polishing method comprises the following steps of 1 adding a non-Newtonian fluid polishing solution mixed with abrasive particles and having the shear thickening effect into a polishing pond and fixing a workpiece on a clamp, wherein the clamp is located above the polishing pond; 2 starting a polishing solution circulating system to enable the non-Newtonian fluid polishing solution to be circularly pumped out of the bottom of the polishing solution and fed into the upper portion of the polishing pond; 3 starting an ultrasonic wave generating device, and meanwhile setting the vibration frequency and vibration amplitude to enable the non-Newtonian fluid polishing solution in the polishing pond to rapidly vibrate and produce a strong shear thickening phenomenon; 4 adjusting the clamp to enable the workpiece to perform relative motion, wherein the abrasive particles having the polishing effect produce the micro-cutting effect or chemical mechanical effect on the workpiece to remove materials on the workpiece surface, and accordingly the workpiece surface polishing is achieved. The invention further provides an ultrasonic control shear thickening and polishing device. The ultrasonic control shear thickening and polishing method and device is high in polishing efficiency and low in cost.

An assembly is provided for fixing the position of an adjustable component (22) of a vehicle, comprising in combination a fixed reference frame (20) within the vehicle such as a dash or a firewall, an adjustable component (22) also disposed in the vehicle such as an adjustable steering column (10), pedals, or a seat. Interconnecting the fixed reference frame (20) and the adjustable component (22) is a fluid locking mechanism (50) which permits selective positioning of the adjustable component relative to the fixed reference frame (20) and holds the adjustable component (22) in position. The fluid locking mechanism (50) is preferably a non-Newtonian flow fluid locking mechanism which uses a magneto-rheological fluid (97) to fix the position of the adjustable component (22) in place once the desired position is selected. To provide additional safety for the vehicle occupants, the fluid locking mechanism may be controlled by an electrical microprocessor (556) or circuit which adjusts the locking strength of the fluid locking mechanism (50) based upon user inputs and dynamic events.

The composite lithium-base lubricating grease consists of the following components: high alkality calcium sulfonate with calcium carbonate existing in calcite crystal and dispersed colloid particle form in 20-60 wt%; thickener comprising composite lithium soap in 3-15 wt%; and lubricating base oil in the rest amount. The preparation process of the lubricating grease includes mixing and heating Newtonian fluid high alkality calcium sulfonate, converting agent and base oil until thickening; adding C12-C24 fatty acid and auxiliary acid and producing saponification with lithium hydroxide aqua; heating to dewater and cooling to form grease. The composite lithium-base lubricating grease of the present invention has excellent mechanical stability, colloid stability, water resistance, rust resistance and high temperature use performance.

A projectile is provided comprising a body with a channel that contains a non-Newtonian fluid. In various embodiments a plunger is located in the channel, wherein the plunger transmits a force to the non-Newtonian fluid upon interacting with a target, causing the non-Newtonian fluid to exert a pressure in the channel, and wherein the viscosity of the non-Newtonian fluid changes upon interacting with the target. By way of non-limiting example, the non-Newtonian fluid of embodiments of the present invention can comprise a shear-thickening fluid that increases its viscosity with at least the rate of shear upon interacting with the target.

A method for transporting a substrate is provided. In this method, a non-Newtonian fluid is provided and the substrate is suspended in the non-Newtonian fluid. The non-Newtonian fluid is capable of supporting the substrate. Thereafter, a supply force is applied on the non-Newtonian fluid to cause the non-Newtonian fluid to flow, whereby the flow is capable of moving the substrate along a direction of the flow. Apparatuses and systems for transporting the substrate using the non-Newtonian fluid also are described.

A system and method to model and analyze the mixing energies of high-yielding non-Newtonian fluids to prevent chemical lost circulation is disclosed. Laboratory tests are preformed under varying conditions from which data on the mixing energies needed to optimize the use of high-yielding non-Newtonian fluids to prevent lost circulation is obtained. This data is then applied to a non-linear mathematical modeling system that is capable of scaling the data to give a dimensionless value. This value can be combined with historic information to predict optimal flow rates and mixtures to prevent chemical lost circulation. This data may be verified by means of simulation, lab testing, or application to a full-size well.

A rheological performance analyzer of supercritical fluid-polymer system consists of polymer-supercritical fluid mixing unit and rheological performance analysis unit. It is featured as adding supercritical fluid unit based on thin tube rheological instrument for making it be able to be used to carry out analysis on rheological performance of polymer-supercritical fluid system.

The invention relates to the technical field of traffic speed limitation and in particular relates to a settleable deceleration strip based on a non-Newtonian fluid. The settleable deceleration strip based on the non-Newtonian fluid comprises a deceleration strip; a non-Newtonian fluid filler is arranged at an inner layer of the deceleration strip; a soft rubber bag is arranged on an outer layer of the non-Newtonian fluid filler; a hard rubber protective cover is arranged on an outer layer of the soft rubber bag; the hard rubber protective cover is fixed on the floor through a plurality of fixing bolts. The settleable deceleration strip based on the non-Newtonian fluid has dual functions of limiting speeds of vehicles and protecting vehicles; besides, the settleable deceleration strip may settle when vehicles pass through the settleable deceleration strip at low speeds, such that the vehicles can smoothly pass through the settleable deceleration strip; as a result, the comfort of driving is enhanced and the wear of vehicles is reduced; besides, the settleable deceleration strip is simple in structure, ingenious in design and high in practicability.

A method and apparatus are disclosed that allow Conformal Vortex Generator art to improve energy efficiency and control capabilities at many points in a turbomachine or device processing aero/hydrodynamic Newtonian fluid-flows.

The invention provides an establishment method for a free surface flow model in a moving particle semi-implicit algorithm, comprising the following steps of: introducing a turbulence model which comprises a static Smagorinsky model and a dynamic Smagorinsky model in the form of Lagrange; treating a non-Newtonian fluid having a constitutive equation like mu = f(the absolute value ofgamma) by adopting a variable-viscosity Newtonian fluid model; and introducing a cubic spline kernel function, discretizing the shear stress of the non-Newtonian fluid by adopting the divergence discretization scheme of a smooth particle fluid dynamic method, and treating the free surface flow of the non-Newtonian fluid. According to the method provided by the invention, the sub-particle stress model of turbulence can be considered, and the method provided by the invention can be used for calculation for the non-Newtonian fluid.

The object of the invention relates to a dildo for sexual stimulation, comprising a tubular body (1) with a hollow structure made of a smooth material, such as silicone or rubber, having a shape and size similar to a penis, filled with a non-Newtonian fluid (2), the viscosity of which increases as the tension gradient applied thereto increases.

The invention discloses an ultra-precision flexible chemical mechanical polishing device and method for a micro bearing core element. The core element comprises an inner ferrule, a retainer, a rollingbody and an outer ferrule. The polishing device comprises an element rotation module, an outer ferrule steering module, an element clamping module, a polishing liquid pool rotation module and a support. The element clamping module provides an inner ferrule clamp, a retainer clamp, a rolling body clamp and an outer ferrule clamp in a targeted manner. The polishing method comprises the steps of installing and debugging the polishing device, preparing flexible chemical mechanical polishing liquid, setting polishing process parameters, measuring the surface quality and conducting feedback. The flexible chemical mechanical polishing liquid comprises non-Newtonian fluid, 0.01-40 wt% of grinding particles, 0-10 wt% of an oxidizing agent, 0-10 wt% of a metal complexing agent, 0-5 wt% of a metal corrosion inhibitor and the balance water, and the pH value is 2.0 to 10.0. According to the ultra-precision flexible chemical mechanical polishing device and method, by optimizing the synergistic effect of the chemical reaction and the mechanical force of the force rheological effect, ultra-precision low-damage machining and complex curved surface shape-preserving machining of the surface of the core element can be achieved, and the device and method are green and environment-friendly.

The invention relates to a blood viscosity acquiring method and system. The method comprises the following steps: using a microprocessor to instruct an electromagnetic driving device to drive a cassette mechanism to rotate, thereby driving a disc and a cone to rotate at an accelerated speed by the cassette mechanism; using the microprocessor to instruct the electromagnetic driving device to stop driving when determining that the rotation speed of the cone reaches a preset first switching rate, thereby driving the disc and the cone to rotate at a decelerated speed by the cassette mechanism; using the microprocessor to instruct a photoelectric sensor to acquire the rotation angular velocity and the angular acceleration of the cone in the process of rotating at the decelerated speed; and acquiring the viscosity of the sample according to the rotation angular velocity and the angular acceleration. By using the embodiment of the invention, the influence on the viscosity of the sample caused by a frictional force generated between the electromagnetic driving device and the disc is avoided, the accuracy of the viscosity of the sample is increased, and the measurement for the viscosities of Newtonian fluid and non-Newtonian fluid under the condition of a determined switching rate is realized.

The invention concerns a method and a system for predicting the apparent flow conductivity of a heterogeneous medium. According to the invention, the following steps are implemented:—choosing a flow conductivity element type with a given set of characteristic parameters;—determining equations for said flow in said element type;—determining a network statistics for said given set of characteristic parameters; and—performing a stochastic homogenisation of said equations, for said network statistics. The invention applies more particularly to the predicting of the apparent viscosity of non-Newtonian fluids in a heterogeneous porous medium.

The composite mixed mode and flow mode double-channel magnetic rheologic damper includes work cylinder, piston type magnetic field generator, compensator and sealing unit. The piston type magnetic field generator has two flow channels, including the outer channel without magnetic field and operating in mixed mode and the inner channel inside magnetic field and operating in flow mode. The damper may operate in no outer exciting current state with relatively small damping and in large outer exciting current state with relatively great damping. This kind of double-channel structure makes the magnetic rheologic damper possess greatly lowered damping under the condition of no external magnetic field, has expanded dynamic regulation range and even suitable for the semi-active control of vehicle suspension.

The invention relates to a rock-soil medium progressive failure, solid-like. The smooth particle dynamics (SPH) method is improved from three aspects: boundary condition, constitutive relation and artificial stress, so that the SPH can reproduce the progressive failure of rock and soil media under strong earthquake dynamic condition, solid-like-liquid phase change behavior, constructing slip-freeboundary modified by seismic wave velocity to apply seismic wave, creating free-field boundary to prevent seismic wave reflection, using particle rheology for reference, combining Drucker-Prager constitutive model and Newtonian fluid constitutive model construct a new unified constitutive model, which can describe the phase from sliding (solid-like) to flowing (liquid-like) in geotechnical media.The invention effectively reproduces the kinematic characteristics of the start-up, high-speed flow and accumulation process of the landslide, analyzes the progressive failure of the rock and soil medium and the penetration process of the sliding surface under the action of the strong earthquake, thereby accurately predicting the sliding distance, and reasonably assesses the earthquake-triggered landslide. The hazard caused by debris flow provides scientific basis for the planning and design of earthquake prevention and disaster reduction.