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Related Concept Videos

Measurement of Fluid Pressure01:16

Measurement of Fluid Pressure

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Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
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Fluid Pressure01:14

Fluid Pressure

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In mechanical engineering, fluid pressure plays a critical role in designing systems that utilize liquid flow, such as hydraulic systems, pumps, and valves. When designing these systems, engineers must ensure they can withstand the forces created by fluid pressure to avoid damage or failure.
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Static, Stagnation, Dynamic and Total Pressure01:24

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The concept of static, stagnation, dynamic, and total pressure is fundamental in fluid dynamics, often explained using Bernoulli's equation:
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Fluid Pressure over Flat Plate of Variable Width01:02

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When a flat plate is submerged in a fluid, the fluid exerts pressure on the plate. This pressure can lead to many different phenomena, including drag and buoyancy. To understand the behavior of the fluid over a flat plate of variable width, it is essential to analyze the distribution of the pressure exerted.
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Pressure Variation in a Fluid at Rest01:11

Pressure Variation in a Fluid at Rest

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In a fluid at rest, the pressure at any point beneath the fluid surface depends solely on the depth, not on the container's shape or size. This principle, known as hydrostatic pressure, arises because, in stationary fluids, there is no acceleration, meaning the forces within the fluid balance out. Only vertical forces, caused by the weight of the fluid above, contribute to pressure changes with depth.
When measuring pressure at two different levels within the fluid, the difference in...
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Fluid Pressure over Flat Plate of Constant Width01:05

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When a body is submerged in water, it experiences fluid pressure acting normal on its surface and distributed over its area. For better design structures, it is crucial to determine the magnitude and location of the resultant force acting on the surface. In the case of a rectangular plate of constant width submerged in water, the pressure increases with depth, resulting in a linearly varying trapezoidal pressure distribution from the upper to the lower edge of the plate.
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The Measurement of Unsteady Surface Pressure Using a Remote Microphone Probe
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Passive Wireless Pressure Gradient Measurement System for Fluid Flow Analysis.

Partha P Dutta1, Alexander C Benken1, Tao Li2

  • 1Center for Wireless Integrated MicroSensing and Systems (WIMS2), ECE Division, EECS Department, University of Michigan, Ann Arbor, MI 48109, USA.

Sensors (Basel, Switzerland)
|March 11, 2023
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Summary
This summary is machine-generated.

This study introduces passive wireless inductive-capacitive (LC) pressure sensors for precise flow rate measurement in challenging core-flood experiments. The system achieves high-resolution pressure sensing under extreme conditions, enabling continuous monitoring.

Keywords:
differentialenergy industryharsh environmenthigh resolutionphysical sensors

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Area of Science:

  • Geosciences
  • Engineering
  • Materials Science

Background:

  • Measuring small flow rates in high-resistance fluidic channels, common in core-flood experiments, faces challenges from extreme conditions like high bias pressures, temperatures, and corrosive fluids.
  • Traditional pressure measurement methods struggle with the resolution and environmental robustness required for long-term core-flood studies.

Purpose of the Study:

  • To develop and validate a system using passive wireless inductive-capacitive (LC) pressure sensors for accurate pressure gradient measurement in core-flood experiments.
  • To address the limitations of existing sensors in harsh experimental conditions, enabling continuous monitoring of flow rates.

Main Methods:

  • Designed and modeled microfabricated passive wireless LC pressure sensors (smaller than ø15 × 3.0 mm³) to minimize pressure resolution, considering packaging and environmental factors.
  • Developed a system for wireless interrogation of distributed LC sensors with external readout electronics, allowing continuous monitoring.
  • Validated the sensor system using a test setup simulating core-flood conditions, including pressures up to 20 bar and temperatures up to 125 °C.

Main Results:

  • The microsystem demonstrated reliable operation across a full-scale pressure range of 20,700 mbar and temperatures up to 125 °C.
  • Achieved a pressure resolution of less than 1 mbar.
  • Successfully resolved flow rate gradients of 10-30 mL/min, typical for core-flood experiments.

Conclusions:

  • Passive wireless LC pressure sensors offer a robust solution for high-resolution pressure gradient measurement in challenging core-flood experiments.
  • The developed system enables continuous, reliable monitoring under harsh conditions, improving the accuracy of flow rate determination in porous media studies.