Flow Regime Identification
Flow Regime Identification - Related Videos
03:03
Identification and Enumeration of Immune Cells in Bronchoalveolar Lavage Fluid by Flow Cytometry
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2025
This video demonstrates the use of flow cytometry to identify and count various immune cells in bronchoalveolar lavage fluid. Initially, single immune cells are identified using a viability dye, followed by differential staining of surface marker proteins, enabling the precise enumeration of each cell type.
08:59
Identification Of Erythromyeloid Progenitors And Their Progeny In The Mouse Embryo By Flow Cytometry
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Cited by 13 •
2017
While infiltrating macrophages are continuously recruited to adult tissues from circulating precursors, resident macrophages seed their tissue during development, where they are maintained without further input from progenitors. The progenitors for resident macrophages were recently identified. Here, we present methods for the genetic fate mapping of the resident macrophage progenitors.
15:32
Identification and Analysis of Mouse Erythroid Progenitors using the CD71/TER119 Flow-cytometric Assay
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Cited by 147 •
2011
A flow-cytometric method for identification and molecular analysis of differentiation-stage-specific murine erythroid progenitors and precursors, directly in freshly –harvested mouse bone marrow, spleen or fetal liver. The assay relies on cell-surface markers CD71, Ter119, and cell size.
09:40
Identification of a Murine Erythroblast Subpopulation Enriched in Enucleating Events by Multi-spectral Imaging Flow Cytometry
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Cited by 6 •
2014
The present protocol describes a novel method of identifying a population of enucleating orthochromatic erythroblasts by multi-spectral imaging flow cytometry, providing a visualization of the erythroblast enucleation process.
05:21
Operation of Laboratory Photobioreactors with Online Growth Measurements and Customizable Light Regimes
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Cited by 2 •
2021
This publication describes the design of laboratory photobioreactors (PBRs) with customizable light regimes. The growth of cyanobacteria or microalgae, using bicarbonate as their carbon source, is monitored continuously by measuring volumetric oxygen production. These PBRs facilitate rapid, replicated laboratory growth comparisons with little user intervention during experiments.
FAQs
Reynolds number helps connect fluid properties, velocity, and pipe geometry to the resulting flow condition. In flow regime identification, engineers use it with observations and pressure data to distinguish laminar from turbulent behavior rather than treating it as an isolated criterion. This classification supports subsequent estimates of pressure drop, transfer, and equipment performance.
In gas-liquid systems, phase fraction and superficial velocity add information that single-phase indicators cannot provide. These variables help interpret whether the mixture appears stratified, slug, annular, or dispersed, especially when combined with flow maps. Their inclusion makes identification more representative of the actual multiphase condition inside a pipe, channel, or reactor.
Visual distinctions provide the first basis for separating regimes, while pressure measurements and governing parameters add quantitative support. Laminar and turbulent conditions can therefore be evaluated differently from gas-liquid patterns such as slug or annular flow. Using both pattern recognition and measured conditions reduces reliance on a single observation when assessing system behavior.
Flow regime identification can begin with visual observation of the moving fluid or mixture, followed by pressure measurements and sensor readings. Engineers then compare those observations with velocity, fluid properties, geometry, and relevant flow maps. For gas-liquid service, they also consider phase fraction and superficial velocity before assigning the observed condition.
Correct classification helps engineers anticipate how a system may behave, including its pressure drop, heat and mass transfer, erosion, vibration, and equipment performance. The value is predictive: identifying the prevailing regime supplies a basis for evaluating these outcomes instead of treating all fluid motion through the system as equivalent.
Engineers apply the approach in pipes, channels, and reactors, as well as process, energy, and transport systems. It is particularly relevant when operating conditions can affect equipment performance or safe operation. A regime assessment links measured flow behavior to design and operating decisions involving hydraulic losses, transfer processes, erosion, vibration, and system safety.