Abstract
Water velocities in the centimeter or millimeter per second range are measurable by only a few instruments. Experimental laboratory studies frequently require such measurements. An inexpensive optical hydrogen bubble tracing device is described for velocity measurements in the range 0.5 to 8 cm/s. Modification to a thymol blue (pH) tracer method extends its applicability to the range 0.1 to 1.0 cm/s. Design and operational characteristics of the hydrogen bubble/thymol blue current meter are described. Analysis of low Reynolds number flow around a cylinder is used to explain meter calibration characteristics.
Translated title of the contribution | Hydrogen bubble/thymol blue water velocity meter |
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Original language | French |
Pages (from-to) | 187-196 |
Number of pages | 10 |
Journal | Journal of Hydraulic Research |
Volume | 25 |
Issue number | 2 |
DOIs | |
State | Published - Mar 1987 |
Externally published | Yes |
Bibliographical note
Funding Information:material is based on work done under National Science Foundation Grant No. CEE 830