Inertial Ordering
Inertial Ordering - Related Videos
08:08
Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis
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Cited by 35 •
2014
Body segmental inertial properties are required for inverse dynamics modeling. Using an oscillation and reaction board technique, inertial properties of below-knee prostheses were measured. Using direct measures of prosthesis inertia in the inverse dynamics model of the prosthetic leg resulted in lower magnitudes of resultant joint forces and moments.
01:03
Inertial Frames of Reference
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2023
Newton’s first law is usually considered to be a statement about reference frames. It provides a method for identifying a special type of reference frame: the inertial reference frame. In principle, we can make the net force on a body zero. If its velocity relative to a given frame is constant, then that frame is said to be inertial. So, by definition, an inertial reference frame is a reference frame where Newton's first law holds valid. Newton's first law applies to objects with constant...
01:27
Non-inertial Frames of Reference
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2023
A reference frame accelerating or decelerating relative to an inertial frame is a non-inertial frame. To help understand this, consider what taking off in an airplane, turning a corner in a car, riding a merry-go-round, and the circular motion of a tropical cyclone all have in common. All these systems are accelerating, decelerating, or rotating relative to the Earth; hence, they all are non-inertial frames. All these systems exhibit inertial forces, which merely seem to arise from motion,...
05:32
3D Printing of In Vitro Hydrogel Microcarriers by Alternating Viscous-Inertial Force Jetting
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Cited by 5 •
2021
Presented here is a mild 3D printing technique driven by alternating viscous-inertial forces to enable the construction of hydrogel microcarriers. Homemade nozzles offer flexibility, allowing easy replacement for different materials and diameters. Cell binding microcarriers with a diameter of 50-500 µm can be obtained and collected for further culturing.
07:37
Label-free Neutrophil Enrichment from Patient-derived Airway Secretion Using Closed-loop Inertial Microfluidics
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Cited by 2 •
2018
In this research, we demonstrate a label-free neutrophil separation method from clinical airway secretions using closed-loop operation of spiral inertial microfluidics. The proposed method would expand the clinical in vitro assays for various respiratory diseases.
FAQs
Stable focusing arises from a balance of lift forces and particle interactions. Shear-gradient lift acts within the velocity profile, while wall-induced lift changes the particle’s lateral position near channel boundaries. Once particles approach preferred locations, hydrodynamic interactions can align them into trains and establish ordered spacing during flow.
Finite-Reynolds-number flow is important because inertial effects generate the lateral forces needed for ordering. In a regime with appreciable inertia, shear-gradient and wall-induced lift can move suspended objects toward stable positions rather than leaving their distribution governed only by the initial flow arrangement. This enables reproducible focusing.
Channel geometry does more than contain the fluid: it influences where particles focus and how ordered trains develop. Curved channels add flow effects that can modify the focusing behavior produced by lift forces. Consequently, channel shape becomes a design variable when a device must produce consistent positions, spacing, or downstream handling.
To promote inertial ordering, a microfluidic design must coordinate flow with channel geometry and the presence of appreciable inertia. The relevant outcome is not simply particle motion, but stable lateral positions or ordered trains. Evaluating focusing and spacing therefore helps determine whether the channel supports uniform processing.
Bioengineering uses inertial ordering for label-free cell focusing, sorting, and counting. These functions exploit the formation of stable positions or trains within a flowing sample and can support continuous sample processing. The same principle also applies to suspended microorganisms and engineered particles, making the approach relevant across several bioengineering workflows.
Controlling the degree of ordering can improve the uniformity and throughput of a microfluidic device. More consistent positions or spacing can make particle handling easier to coordinate as samples move through the channel. In practice, this connects the physical organization of blood cells, microorganisms, or engineered particles with more precise downstream processing.