scholarly journals Low-Velocity Flow Doppler Enhancement for the Study of Spontaneous Echo Contrasts

2021 ◽  
Vol 0 (0) ◽  
pp. 0
Author(s):  
George Thomas
Keyword(s):  
Low Velocity ◽  
Velocity Flow

scholarly journals A Portable & Disposable Ultra-Low Velocity Flow Sensor from Bioinspired Hair-Like Microstructures

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 731 ◽  
Author(s):  
Harish Devaraj ◽  
Rajnish Sharma ◽  
Enrico Haemmerle ◽  
Kean Aw
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Modular Design ◽  
Measurement Range ◽  
Flow Sensor ◽  
Design Development ◽  
Low Velocity ◽  
Velocity Flow ◽  
Loop Feedback ◽  
Air Flow Velocity

We present, for the first time, the design, development and testing of a portable ultra-lowvelocity flow sensor with a disposable architecture for use in medical applications. 3Dmicroprintingtechnique was used to fabricate high aspect ratio microscopic hair-like structuresfrom conducting polymers, in particular, poly(3,4-ethylenedioxythiophene):polystyrene-sulfonate(PEDOT:PSS). These high aspect ratio micro-hairs are flexible and conductive that can respond toair flowing over them. A disposable and portable flow sensor with a modular design that allowstuning of measurement range was developed, for integration with an automated neonatalresuscitator to provide closed-loop feedback. The developed portable sensor architecture is capableof real-time indication of the air flow velocity range down to few millimeters/second.

scholarly journals Gravitational Focusing of Low-Velocity Dark Matter on the Earth’s Surface

Galaxies ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 42 ◽  
Author(s):  
Yoshiaki Sofue
Keyword(s):  
Dark Matter ◽  
Solar System ◽  
High Efficiency ◽  
Focal Point ◽  
Flow Speed ◽  
Low Velocity ◽  
The Earth ◽  
Velocity Flow ◽  
Solar System Objects

We show that the Earth acts as a high-efficiency gravitational collector of low-velocity flow of dark matter (DM). The focal point appears on the Earth’s surface, when the DM flow speed is about 17 km/s with respect to the geo-center. We discuss diurnal modulation of the local DM density influenced by the Earth’s gravity. We also touch upon similar effects on galactic and solar system objects.

Representation of a new physics-based non-Darcy equation for low-velocity flow in tight reservoirs

2020 ◽  
Vol 184 ◽  
pp. 106518 ◽  
Author(s):  
Lin Zhao ◽  
Hanqiao Jiang ◽  
Hao Wang ◽  
Hanxu Yang ◽  
Fengrui Sun ◽  
...  
Keyword(s):  
New Physics ◽  
Low Velocity ◽  
Darcy Equation ◽  
Velocity Flow ◽  
Tight Reservoirs

Measurements of low‐velocity flow noise on pressure and pressure gradient hydrophones

1979 ◽  
Vol 65 (6) ◽  
pp. 1407-1412 ◽  
Author(s):  
Robert A. Finger ◽  
Louis A. Abbagnaro ◽  
Benjamin B. Bauer
Keyword(s):  
Pressure Gradient ◽  
Low Velocity ◽  
Flow Noise ◽  
Velocity Flow
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