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Fluid properties evaluation

a technology of fluid properties and properties, applied in water supply installations, instruments, machines/engines, etc., can solve problems such as prone to settling problems of low viscosity products

Inactive Publication Date: 2014-06-10
RHEOLOGY SOLUTIONS PTY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The system described in this patent can measure the properties of a fluid while it flows in a pipe. This has several advantages: the fluid remains unpolluted, the system requires minimal maintenance, complex viscosity and viscoelastic properties can be measured quickly and on demand, and quantified measurements can be used for effective process control. A temperature sensor can be placed in the fluid flow to measure its temperature, and a shield can be positioned to help create a stagnant flow. Additionally, a shield can be used to trap the fluid between the cell surfaces.

Problems solved by technology

Highly viscous products may be undesirable due to expensive pumping costs, however low viscosity products may be prone to settling problems.

Method used

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Embodiment Construction

[0028]Referring to FIG. 1, the rheometer 1 is connected directly to a pipe 2 through which flows a process stream 3. A housing 4 of the rheometer 1 is fixed to the walls of the pipe 2. Two parallel smooth plates 5 and 6 extend from the housing into the pipe in line with the flow to form a test cell 20. The bottom plate 6 may be of complex design to reduce or eliminate edge effects and compensate for the non-compressibility of many fluids which may be measured in this immersed environment.

[0029]The rheometer 1 has an actuator stage 10 inside the housing 4 and a shaft 11, to connect it to the upper moveable plate 5. The shaft is provided with a thermal barrier so as to limit the heat flow out of the chamber. The cell also has a temperature sensor 7 such as a thermocouple or thermistor mounted in the stream. A piezoelectric AC transducer 13 is attached to the bottom plate 6 in the cell. Seals are provided to prevent ingress of the measured fluid around the shafts 11 and 16.

[0030]The ac...

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Abstract

Fluid flow properties often dictate the performance of processing operations. The present invention relates to a system for evaluating properties of a fluid flowing in a pipe. A test cell (20) which includes two parallel surfaces (5, 6) which are positioned in the flow. One of the surfaces is moveable relative to the other, to a position in close proximity to the other, to create a stagnant flow region between the surfaces. The system further includes a test input device (10) to apply input motion to one of the surfaces, and a test output device (13) to measure output motions from the cell in response to input motions. Furthermore, the system includes a processing device (9) to calculate rheological parameters of the fluid from signals produced from the test input and test output device. There is also a process for evaluating properties of a flowing fluid.

Description

[0001]This application is a 371 of PCT / AU02 / 00484, filed Apr. 18, 2002; the disclosure of which is incorporated herein by reference.TECHNICAL FIELD[0002]This invention concerns a system for evaluating properties of a flowing fluid. In another aspect, it concerns a test cell to evaluate the properties of a flowing fluid. In a further aspect it concerns a method for evaluating properties of a flowing fluid.BACKGROUND ART[0003]Rheology concerns the deformation and flow of matter. Materials can resist deformation in a solid-like manner or in a viscous-like manner. Solid-like materials store energy under deformation, upon removal of the stress, the material returns to its undeformed state. Viscous-like materials dissipate stress during deformation. Materials with combined solid-like and viscous-like properties are said to be viscoelastic.[0004]Most materials such as foodstuffs, paints, gels and polymer melts are viscoelastic in nature. Their viscoelasticity is often essential to performa...

Claims

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Application Information

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IPC IPC(8): G06F17/00G01N11/00G01L7/00G01N11/04G01N11/16G01N35/08
CPCG01N11/04G01N11/165G01N35/085Y10T137/0368
Inventor O'BRIEN, VINCENT T.
Owner RHEOLOGY SOLUTIONS PTY LTD
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