Flow Visualisation by Condensing Steam – an Unusual Method Applied to Development of a Low Reynolds Number Fluidic Selector Valve

Authors

  • J. R. Tippetts
  • V. Tesař

DOI:

https://doi.org/10.14311/774

Keywords:

flow visualization, condensing steam, microfluidics, valves

Abstract

A visualization method so far not mentioned in the literature has been recently developed by the authors as a useful validation supplement to numerical flowfield computations in the design of microfluidic devices. The method is based upon water vapour condensation on device channel walls. It is extremely easy to set up with minimum expense – and yet it is very reliable. As an application example, the paper shows the method used in study of properties of a microfluidic valve intended for switching gaseous sample flows in a microfluidic selector sampling unit. A scaled-up model of the valve was built, as usual, in transparent acrylic material, making possible observation and photo-recording of the deposition and subsequent drying of the condensed droplets. The scaling-up slowed down the time scale enough for investigating the transition processes which takes place as the flow in the valve is switched on and off. 

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Author Biographies

J. R. Tippetts

V. Tesař

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Published

2005-01-06

How to Cite

Tippetts, J. R., & Tesař, V. (2005). Flow Visualisation by Condensing Steam – an Unusual Method Applied to Development of a Low Reynolds Number Fluidic Selector Valve. Acta Polytechnica, 45(6). https://doi.org/10.14311/774

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Section

Articles