Abstract
The Reynolds number effect on the turbulent structure of a d-type rough wall turbulent boundary layer was studid experimentally in terms of the coherent structure. Mean bursting frequency, conditional averaged velocity signals and fractional contribution of the stress-generating motions were obtained with both the VITA method and the four-quadrant analysis, respectively. The effect of the three parameters, namely, bulk Reynolds number Rθ, roughness Reynolds number and friction parameter uτ/U1, were considered in the present study. Even scaled with the inner, outer and mixed variables, the nondimensional bursting frequency depends on the Reynolds number. The relative magnitude of fractional stress contribution of ejection to that of sweep increases with decreasing Reynolds number.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
