Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Photoelectric Effect02:26

Photoelectric Effect

39.8K
When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
39.8K
Design Example: Flow of Oil Through Circular Pipes01:25

Design Example: Flow of Oil Through Circular Pipes

478
Understanding fluid flow behavior through pipes is critical in fluid mechanics, especially in applications like oil transportation through pipelines. Hagen-Poiseuille's law provides an exact solution derived from the Navier-Stokes equations for steady, incompressible, and laminar flow within a circular pipe. Hagen-Poiseuille's law helps determine the necessary pressure drop across a pipeline section by determining parameters like pipe length, radius, oil viscosity, and the desired volumetric...
478
Gas Chromatography: Types of Columns and Stationary Phases01:17

Gas Chromatography: Types of Columns and Stationary Phases

2.5K
Gas chromatography (GC) relies on stationary phases to separate and analyze components in a sample. There are two main types of stationary phases: liquid and solid. Liquid stationary phases are non-volatile, thermally stable, and chemically inert liquids coated onto the column. Solid stationary phases are particles of adsorbent material, such as silica gel or molecular sieves.
For an analyte to remain on the column for a sufficient amount of time, it must exhibit some level of compatibility (or...
2.5K
Phase Transitions02:31

Phase Transitions

23.3K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
23.3K
Phase Diagrams02:39

Phase Diagrams

50.5K
A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
50.5K
Classifying Matter by Composition03:35

Classifying Matter by Composition

91.7K
Matter: Pure Substances and Mixtures
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures. 
A pure substance is a form of matter that has a constant composition throughout with uniform properties. For example, any sample of sucrose has the same composition and same physical properties, such as melting point, color, and sweetness, regardless of the source from which it is isolated. 
A mixture is composed of two or...
91.7K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

A Nomogram for Predicting Successful Weaning from Invasive Mechanical Ventilation Withdrawal in Patients with Chronic Obstructive Pulmonary Disease Complicated by Respiratory Failure.

International journal of chronic obstructive pulmonary disease·2026
Same author

Assessing symptom clusters in post-total knee arthroplasty patients: development and validation of a new scale.

BMC musculoskeletal disorders·2026
Same author

Fused pyrazolo[3,4-<i>d</i>]pyridazine <i>N</i>-oxides with balanced detonation performance and safety.

Chemical communications (Cambridge, England)·2026
Same author

Symptom experience of patients after total knee arthroplasty in China: a longitudinal qualitative study.

BMJ open·2026
Same author

Impact of school physical activity on physical and mental health in children and adolescents: A Meta-analysis based on RE-AIM.

European child & adolescent psychiatry·2026
Same author

Small airway dysfunction: a shared, early, measurable, and potentially treatable trait across COPD, asthma, and fibrotic lung disease.

Frontiers in medicine·2026

Related Experiment Video

Updated: Feb 14, 2026

Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors
07:13

Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors

Published on: November 15, 2016

10.7K

Photoelectric Composite Three-Phase Flow Sensor for Complex Oil and Gas Wells.

Qiang Chen1,2, Xueguang Qiao1, Tao Chen2

  • 1Xi'an Key Laboratory of Optical Fiber Sensing Technology for Underground Resources, School of Physics, Northwest University, Xi'an 710127, China.

Sensors (Basel, Switzerland)
|February 13, 2026
PubMed
Summary
This summary is machine-generated.

A novel photoelectric composite sensor accurately measures multiphase flow in oil and gas wells. This integrated device enhances production evaluation by providing precise measurements of gas and water holdup and phase velocities.

Keywords:
complex oil and gas wellsflow velocitygas holdupphotoelectric compositethree-phase flow sensorwater holdup

More Related Videos

Determination of the Gas-phase Acidities of Oligopeptides
11:00

Determination of the Gas-phase Acidities of Oligopeptides

Published on: June 24, 2013

11.7K
Measurement of H2S in Crude Oil and Crude Oil Headspace Using Multidimensional Gas Chromatography, Deans Switching and Sulfur-selective Detection
08:37

Measurement of H2S in Crude Oil and Crude Oil Headspace Using Multidimensional Gas Chromatography, Deans Switching and Sulfur-selective Detection

Published on: December 10, 2015

19.9K

Related Experiment Videos

Last Updated: Feb 14, 2026

Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors
07:13

Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors

Published on: November 15, 2016

10.7K
Determination of the Gas-phase Acidities of Oligopeptides
11:00

Determination of the Gas-phase Acidities of Oligopeptides

Published on: June 24, 2013

11.7K
Measurement of H2S in Crude Oil and Crude Oil Headspace Using Multidimensional Gas Chromatography, Deans Switching and Sulfur-selective Detection
08:37

Measurement of H2S in Crude Oil and Crude Oil Headspace Using Multidimensional Gas Chromatography, Deans Switching and Sulfur-selective Detection

Published on: December 10, 2015

19.9K

Area of Science:

  • Petroleum Engineering
  • Flow Measurement Technology
  • Sensor Development

Background:

  • Multiphase flow measurement is critical for oil and gas production evaluation.
  • Conventional sensors face limitations like low integration and environmental concerns.
  • Advanced sensing is needed for complex well conditions.

Purpose of the Study:

  • To develop an integrated photoelectric composite sensor for accurate three-phase flow measurement.
  • To overcome limitations of existing multiphase flow sensors.
  • To provide advanced tools for oil and gas well logging.

Main Methods:

  • Integration of electrode rings for water holdup and liquid velocity.
  • Incorporation of dual optical-fiber probes for gas holdup and gas velocity.
  • Application of a slip model for slip velocity quantification.

Main Results:

  • High sensitivity to bubble-flow structures and accurate phase velocity extraction.
  • Stable, full-range water holdup calibration (0-100%) with compensation.
  • Demonstrated advantages in integration, structure, and resolution over existing technologies.

Conclusions:

  • The developed sensor offers a highly integrated and accurate solution for multiphase flow measurement.
  • It provides advanced technical means for conventional profile three-phase flow logging.
  • The sensor exhibits superior performance, especially in low-saturation areas.