Wachter F, Becker S, Schlatter P (2026)
Publication Type: Book chapter / Article in edited volumes
Publication year: 2026
Publisher: Springer Science and Business Media B.V.
Edited Volumes: Direct and Large Eddy Simulation XIV - Proceedings of DLES14
Series: ERCOFTAC Series
Book Volume: 21
Pages Range: 45-51
DOI: 10.1007/978-3-032-19268-4_7
The focus of the investigation is on axisymmetric turbulent boundary layers that develop around streamwise oriented long cylindrical objects, such as those found in applications like towed array sonars or marine seismic streamers. Such devices have, in a simplified view, a long tube-like geometry (circular cross-section) with several hydrophones embedded in their center and are typically towed underwater behind a vessel. Capable of sensing acoustic waves, they are widely used for navigation, communication, maritime surveillance and geophysical exploration. For these and many other applications, the turbulent fluctuations within the turbulent boundary layer (TBL) often have a negative impact compared to a laminar flow situation. Turbulence in wall-bounded flows can excite vibrations in exposed solid structures and generally leads to increased wall shear stress. Furthermore, sound waves can be diffracted or absorbed when traveling
through a region of turbulent flow, and turbulent fluctuations of velocity, wall shear stress and pressure can act as intense sound sources. Such sound sources induce the unwanted flow noise of the towed array sonar or marine seismic streamer, which limits the performance of the acoustic pressure sensing device by decreasing the signal-to-noise ratio. With the motivation to improve the performance of these devices, the aim of the work was to design a surface modification that influences the TBL around a cylinder in axial flow to reduce the near-wall turbulence. The surface modification investigated consists of streamwise-aligned grooves and convex regions with strong transverse curvature between the grooves.
APA:
Wachter, F., Becker, S., & Schlatter, P. (2026). The Influence of Regions of Convex Transverse Curvature and Concave Grooves on the Turbulent Boundary Layer Along a Cylinder in Axial Flow. In Direct and Large Eddy Simulation XIV - Proceedings of DLES14. (pp. 45-51). Springer Science and Business Media B.V..
MLA:
Wachter, Florian, Stefan Becker, and Philipp Schlatter. "The Influence of Regions of Convex Transverse Curvature and Concave Grooves on the Turbulent Boundary Layer Along a Cylinder in Axial Flow." Direct and Large Eddy Simulation XIV - Proceedings of DLES14. Springer Science and Business Media B.V., 2026. 45-51.
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