Title :
Thermal flow measurements at Gr/Re2≫1 by silicon anemometry
Author :
Van Putten, Michael J A M ; Van Putten, Maurice H P M ; Van Putten, Anton F P
Author_Institution :
Fac. of Appl. Phys., Delft Univ. of Technol., Netherlands
fDate :
6/1/1999 12:00:00 AM
Abstract :
We present the first characteristics of air flow measurements in the mixed convective region with strong buoyancy effects (Gr/Re2 ≫1), using a thermal silicon double-Wheatstone-bridge vector sensor. The alternating direction method is applied to eliminate additive drift influences. The upper limit on the mixed convective region is experimentally defined to be given by Gr/Re2=[0.3-0.8]. Flow velocity measurements of down to 1 mm/s (Reynolds ≈ 0.3) are realized with an accuracy better than 98%
Keywords :
anemometers; anemometry; bridge circuits; elemental semiconductors; forced convection; natural convection; silicon; Si; additive drift influences; air flow measurements; alternating direction method; double-Wheatstone-bridge vector sensor; flow velocity measurements; forced convection; mixed convective region; natural convection contribution; silicon anemometry; strong buoyancy effects; thermal flow measurements; thermal sensor; upper limit; Bridge circuits; Fluid flow measurement; Force measurement; Sensor phenomena and characterization; Silicon; Temperature distribution; Temperature sensors; Thermal force; Thermal sensors; Velocity measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
