A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Boundary Shear Stress Measurement in Open Channels
The report presents the results of research into the development of a modified Preston tube for the measurement of boundary shear stresses in hydraulically smooth channels. Modifications made to the conventional tube comprise the addition of a 'wake' pressure tube to which Preston tube pressures may be differentially compared. Initial development and calibration of the modified Preston tube, (referred to as the Roving Preston tube or RPT), was experimentally undertaken using air in a closed circular conduit. Verification and further development of the RPT concept was undertaken using water in an open channel. Shear stresses were measured within the range 0.2 to 1.8 Nm2. Average boundary shear stresses, derived from integration of measured distributions within the channel, were in good agreement with those estimated from energy grade line slopes associated with flow within the channel. In view of the good experimental correlations obtained between average RPT and energy grade lines slope derived shear stresses, it is concluded that the RPT technique may be reliably applied to the measurement of boundary shear stresses.
Boundary Shear Stress Measurement in Open Channels
The report presents the results of research into the development of a modified Preston tube for the measurement of boundary shear stresses in hydraulically smooth channels. Modifications made to the conventional tube comprise the addition of a 'wake' pressure tube to which Preston tube pressures may be differentially compared. Initial development and calibration of the modified Preston tube, (referred to as the Roving Preston tube or RPT), was experimentally undertaken using air in a closed circular conduit. Verification and further development of the RPT concept was undertaken using water in an open channel. Shear stresses were measured within the range 0.2 to 1.8 Nm2. Average boundary shear stresses, derived from integration of measured distributions within the channel, were in good agreement with those estimated from energy grade line slopes associated with flow within the channel. In view of the good experimental correlations obtained between average RPT and energy grade lines slope derived shear stresses, it is concluded that the RPT technique may be reliably applied to the measurement of boundary shear stresses.
Boundary Shear Stress Measurement in Open Channels
L. T. Isaacs (author) / J. C. Macintosh (author)
1988
72 pages
Report
No indication
English
Boundary shear stress in smooth rectangular open channels
| British Library Conference Proceedings | 2002
Boundary shear stress measurement in open channel
| TIBKAT | 1988
Estimation of boundary shear stress distribution in open channels using flownet
| British Library Online Contents | 2007
Boundary shear stress distributions in trapezoidal channels
| Online Contents | 2005