A microcontroller based wall shear stress measurement

Mourad Laghrouche (1) , David Meunier (1) , Jumana Boussey-Said (1) , Sedat F. Tardu (2) , A. Adane (3)

1 IMEP - Institut de Microélectronique, Electromagnétisme et Photonique
2 LEGI - Laboratoire des Écoulements Géophysiques et Industriels [Grenoble]
3 UMMTO - Université Mouloud Mammeri [Tizi Ouzou]

A new type of hot wire anemometer was developed by using surface micro machining techniques. The reduction of the microprobes section and the development of a thermal isolation cavity below the hot polycrystalline silicon wire reduced considerably indirect thermal exchanges between the hot wire and its substrate. As a consequence, the response time of the sensor is considerably improved allowing the detection of fast fluctuations and turbulent phenomena in fluid mechanics. In this paper we briefly describe the realisation technology of the developed sensors, its operation principles and the data acquisition circuit especially conceived and realised to perform turbulent flow detection in a low speed wind tunnel.

Keywords: MEMS; sensor data acquisition; wall shear stress sensor

Domains: Fluid mechanics [physics.class-ph]; Fluids mechanics [physics.class-ph]; Micro and nanotechnologies/Microelectronics

Mourad Laghrouche, David Meunier, Jumana Boussey-Said, Sedat F. Tardu, A. Adane. A microcontroller based wall shear stress measurement. IEEE International Symposium on Industrial Electronics, May 2004, Ajaccio, France. ⟨10.1109/ISIE.2004.1571793⟩. ⟨hal-00262264⟩