Browsing ODA Open Digital Archive by Author "Örlü, Ramis"
Now showing items 1-5 of 5
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Direct Numerical Simulations of Turbulent Flow in Helical Pipes
Lupi, V.; Örlü, Ramis; Schlatter, P. (ERCOFTAC Series;, Chapter; Peer reviewed; Conference object; Journal article, 2023)Direct numerical simulations of the fully developed turbulent flow through helical pipes are performed. The numerical procedure is described, and a validation of the volume force driving the flow is presented. A comparison ... -
Flow resistance over heterogeneous roughness made of spanwise-alternating sandpaper strips
Frohnapfel, B.; von Deyn, L. H.; Yang, J.; Neuhauser, J.; Stroh, A.; Örlü, Ramis; Gatti, D. (Peer reviewed; Journal article, 2024)The Reynolds number dependent flow resistance of heterogeneous rough surfaces is largely unknown at present. The present work provides novel reference data for spanwise-alternating sandpaper strips as one idealised case ... -
In-Situ Analysis of Backflow Events and Their Relation to Separation in Wings Through Well-Resolved LES
Mallor, F.; Liu, J.; Peplinski, A.; Vinuesa, R.; Örlü, Ramis; Weinkauf, Tino; Schlatter, P. (ERCOFTAC (European Research Community on Flow, Turbulence and Combustion);, Chapter; Peer reviewed; Conference object; Journal article, 2023)Wall-bounded turbulent flows as those occurring in transportation (e.g. aviation) or industrial applications (e.g turbomachinery), are usually subjected to pressure gradients (PGs). The presence of such PGs affects greatly ... -
Measurements in a Turbulent Channel Flow by Means of an LDV Profile Sensor
Pasch, S.; Leister, R.; Gatti, D.; Örlü, Ramis; Frohnapfel, B.; Kriegseis, J. (Peer reviewed; Journal article, 2023)Spatially and temporally resolved velocity measurements in wall-bounded turbulent flows remain a challenge. Contrary to classical laser Doppler velocimetry (LDV) measurements, the laser Doppler velocity profile sensor ... -
Modal stability analysis of toroidal pipe flow approaching zero curvature
Lupi, V.; Canton, J.; Rinaldi, E.; Örlü, Ramis; Schlatter, P. (Peer reviewed; Journal article, 2024)The present study investigates the modal stability of the steady incompressible flow inside a toroidal pipe for values of the curvature δ (ratio between pipe and torus radii) approaching zero, i.e. the limit of a straight ...