I would like to use Preston tube to measure the bed shear stress in open channel, but I do not have idea how can I get static pressure. what is the type of static pressure tube? how can I use the static pressure tube?
For the application of Preston tube to the estimation of bed shear stress, I would suggest to read the paper from Ackerman et al. (J. Fluids Eng, 1994)
In general the static pressure is mesured by a hole perpendicular to the streamed wall. one possibility is a second tube at the side of the preston tube with a hole at the side or direct a hole in the wall at the area of interest.
Dear Harith,
I recommend the following interesting article that anwers your question.
http://onlinelibrary.wiley.com/doi/10.4319/lo.2001.46.8.2080/pdf
With my best regards
Prof. Bachir ACHOUR
Thanks Carlo Gualtieri, can you send me the paper if that possible or just address of the paper.
Dear Prof. Bachir Achour,
I'll read this paper carefully.
thanks for your answer and recommended paper.
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