Articles | Volume 4, issue 1
J. Sens. Sens. Syst., 4, 239–247, 2015
J. Sens. Sens. Syst., 4, 239–247, 2015

Regular research article 18 Jun 2015

Regular research article | 18 Jun 2015

Novel microthermal sensor principle for determining the mixture ratio of binary fluid mixtures using Föppl vortices

B. Schmitt et al.

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Cited articles

Albright, P. S. and Gosting, L. J.: Dielectric Constants of the Methanol-Water System from 5 to 55°, J. Am. Chem. Soc., 68, 1061–1063,, 1946.
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Föppl, L.: Wirbelbewegung hinter einem Kreiszylinder, Verl. d. K. B. Akad. d. Wiss., München, 1913.
Hucho, W. H.: Aerodynamik der stumpfen Körper, 2. Auflage, Vieweg + Teubner, Springer, Wiesbaden, Germany, 2011.
Short summary
A novel sensor principle for determining binary fluid mixtures of known components is presented. A bluff body is placed in the fluid channel, causing the formation of a stationary pair of vortices behind the body. The length of the vortex pair depends on the mixture’s viscosity and thus its composition. It is measured by placing a microheater in the vortex area and making use of forced convection which changes with the size of the vortices.