Void Fraction Morphology
Void Fraction Morphology - Related Videos
01:12
Total Voids in Concrete
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2024
Total voids in concrete encompass gel water volume, capillary pores, and entrapped air. Gel water (retained within the cement hydration products) and physically entrapped or adsorbed water are significant for the hydration process. For complete hydration, it's estimated that the space needed for the products of a cubic centimeter of cement doubles. Capillary pores constitute the unoccupied space within the hydrated cement paste, with their size largely influenced by the water-to-cement ratio...
06:39
Real-Time Void Spot Assay
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Cited by 14 •
2023
This article describes a new method to study mouse voiding behavior by incorporating video monitoring in the conventional void spot assay. This approach provides temporal, spatial, and volumetric information on the voiding events and details of mouse behavior during the light and dark phases of the day.
01:22
Imaging Studies VI: Voiding Cystourethrography and Cystography
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2025
Voiding Cystourethrography (VCUG) and Cystography are specialized radiographic procedures used to examine the structure and function of the bladder and urethra.Voiding Cystourethrography (VCUG)A Voiding Cystourethrogram (VCUG) is a diagnostic imaging procedure that assesses the anatomy and function of the lower urinary tract. It focuses on the bladder, bladder neck, and urethra, helping detect abnormalities such as vesicoureteral reflux (VUR)—the backward or reverse flow of urine into the...
10:09
Fractional Distillation
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2023
Source: Laboratory of Dr. Nicholas Leadbeater — University of Connecticut Distillation is perhaps the most common laboratory technique employed by chemists for the purification of organic liquids. Compounds in a mixture with different boiling points separate into individual components when the mixture is carefully distilled. The two main types of distillation are "simple distillation" and "fractional distillation", and both are widely used in organic chemistry laboratories. Simple distillation...
03:47
Separation of Inner and Outer Membrane Fractions of Gram-Negative Bacteria
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2025
Source: Cian, M. B. et. al., Separation of the Cell Envelope for Gram-negative Bacteria into Inner and Outer Membrane Fractions with Technical Adjustments for Acinetobacter baumannii. J. Vis. Exp. (2020)This video demonstrates the separation of the inner and outer membrane fractions of Gram-negative bacteria using sucrose gradient ultracentrifugation. The membrane fractions are purified and stored at low temperatures for targeted analysis of membrane-specific components.
FAQs
Interfacial forces influence the evolution of bubble size, shape, distribution, and connectivity within a multiphase flow. As these morphological features change, the gas phase can occupy the control volume differently, altering the observed void fraction and the resulting flow structure. Examining these linked characteristics helps engineers distinguish flow behavior rather than relying on gas volume fraction alone.
Changes in superficial velocity, pressure, and channel geometry can modify both the amount of gas present and its spatial arrangement. These conditions influence whether bubbles remain small, become larger, change shape, redistribute, or form connected structures. Comparing morphology across operating conditions therefore helps engineers understand how a system moves between different flow regimes.
Flow regimes reflect characteristic arrangements and motions of phases, so bubble size, shape, distribution, and connectivity provide important evidence for distinguishing them. The same average gas-volume fraction can correspond to different spatial structures and transport behavior. Including morphology improves interpretation of multiphase flow and supports more meaningful engineering predictions.
Engineers can characterize the gas phase by considering its volume fraction together with bubble size, shape, distribution, and connectivity. Evaluating these features under different superficial velocities, pressures, channel geometries, and interfacial conditions reveals how the structure evolves. The resulting description can then be related to flow regime, pressure drop, heat transfer, mass transfer, and mixing.
Void Fraction Morphology supports analysis and design across pipelines, boiling systems, reactors, porous devices, and microfluidic devices. In each setting, the spatial arrangement of gas affects how phases move and interact. Accounting for these structures helps engineers model transport behavior more effectively and improve predictions of system performance under changing operating or geometric conditions.
Models become more informative when they represent both how much gas occupies a control volume and how that gas is arranged. Morphological information connects phase structure with pressure drop, heat transfer, mass transfer, and mixing. This connection helps engineers interpret transport behavior and develop more reliable predictions for multiphase equipment and flow systems.