Velocity Sensors
Reference work entry
DOI: https://doi.org/10.1007/978-0-387-48998-8_1662
Synonyms
Flow sensors; Flow meters
Definition
Flow velocity in microchannels can be measured by means of flow sensors. The basic principle of measuring flow velocity is by monitoring the flight time of particles or elements in the moving fluid after heat impulses are injected. The time taken for the particles or elements to move between two predetermined points is called the flight time. In addition, some principles in heat transfer and fluid dynamics are also applied to give precise estimation of flow conditions. Flow velocity is obtainable from flow rate. The flight time unit is second (s), the flow velocity unit is micrometer per second (\( \mu \)
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References
- 1.Kaltsas G, Nassiopoulou AG (1999) Novel C-MOS compatible monolithic silicon gas flow sensor with porous silicon thermal isolation. Sens Actuators 76:133–138 CrossRefGoogle Scholar
- 2.Fürjes P, Légrádi G, Dücsó C, Aszódi A, Bársony I (2004) Thermal characterisation of a direction dependent flow sensor. Sens Actuators A 115:417–423 CrossRefGoogle Scholar
- 3.Sengupta S, Ziaie B, Barocas VH (2004) Lag-after-pulsed-separation microfluidic flowmeter for biomacromolecular solutions. Sens Actuators B 99:25–29 CrossRefGoogle Scholar
- 4.Kohl M, Liu Y, Dittmann D (2004) A polymer-based microfluidic controller. 17th IEEE Int Conf Micro Electro Mechanic Sys :288–291 Google Scholar
- 5.Navier-Stokes Equations: 3-dimensional-unsteady. Glenn Research Center. National Aeronautics and Space Administration. http://www.grc.nasa.gov/WWW/K-12/airplane/nseqs.html
- 6.Lienhard IV JH, Lienhard V JH (2006) A Heat Transfer Textbook, 3rd ed. Phlogiston Press, Cambridge, Massachusetts Google Scholar
- 7.Okulan N, Henderson HT, Ahn CH (2000) A pulsed mode micromachined flow sensor with temperature drift compensation. IEEE Transact Electron Dev 47(2):340–347 CrossRefGoogle Scholar
- 8.Wikipedia: The Free Encyclopedia. http://en.wikipedia.org/wiki/Microfluidics
- 9.Fung CKM, Sin MLY, Lei TKF, Chow WWY, Lai KWC, Li WJ (2005) Flow rate measurement inside polymer microfluidic systems using carbon nanotube sensors. Sensors 2005 IEEE Oct-Nov: 541–544 Google Scholar
- 10.Poghossian A, Berndsen L, Schöning MJ (2003) Chemical sensor as physical sensor: ISFET-based flow-velocity, flow-direction and diffusion-coefficient sensor. Sens Actuators B 95:384–390 CrossRefGoogle Scholar
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