TY - GEN A1 - Zanoun, El-Sayed A1 - Durst, F. A1 - Saleh, O. A1 - Al-Salaymeh, Ahmed T1 - Wall skin friction and mean velocity profiles of fully developed turbulent pipe flows T2 - Experimental Thermal and Fluid Science Y1 - 2006 U6 - https://doi.org/10.1016/j.expthermflusci.2007.04.002 SN - 0894-1777 VL - 32 IS - 1 SP - 249 EP - 261 ER - TY - CHAP A1 - Öngüner, Emir A1 - Dittmar, Mirko A1 - Meyer, P. A1 - Zanoun, El-Sayed A1 - Egbers, Christoph T1 - Wall-bounded turbulent Structures in pipe flow based on streamwise and cross-sectional PIV at Re=10^4-10^5 T2 - 11th European Fluid Mechanics Conference, Sept. 12-16, 2016, Sevilla, Spain Y1 - 2016 UR - http://www.efmc11.org/download/com/com_0703_KFARSY.pdf ER - TY - GEN A1 - Borcia, Ion-Dan A1 - Richter, Sebastian A1 - Borcia, Rodica A1 - Schön, Franz-Theo A1 - Harlander, Uwe A1 - Bestehorn, Michael T1 - Wave propagation in a circular channel: sloshing and resonance T2 - The European Physical Journal Special Topics N2 - Surface wave resonance of a liquid (water) layer confined in a circular channel is studied both experimentally and numerically. For the experiment, eight unevenly distributed ultrasonic distance sensors measure the local height of the wave surface. The resonance curves show maxima only for odd multiples of the fundamental resonance frequency . We explained this behavior using a simple intuitive “ping-pong” like model. Collision of wave fronts can be observed for higher frequencies. Also, the wave reflection on the walls can be treated as wave collision with itself. The non-linearity seems to be weak in our study so the delay in the wave propagation before and after the collision is small. Time-space plots show localized propagating waves with high amplitudes for frequencies near resonance. Between the peaks low amplitude and harmonic patterns are observed. However, for higher frequencies, the frequency band for localized waves becomes wider. In the Fourier space-time plane, this can be observed as a point for the harmonic patterns or a superposition of two lines: one line parallel to wave-vector k axis corresponding to the excitation frequency and a second line with inclination given by wave propagation velocity . For planned future work, this result will help us to reconstruct the whole water surface elevation using time-series from only a few measurement points Y1 - 2023 UR - https://link.springer.com/article/10.1140/epjs/s11734-023-00790-z U6 - https://doi.org/10.1140/epjs/s11734-023-00790-z SN - 1951-6401 SN - 1951-6355 VL - Vol. 232 IS - 4 SP - 461 EP - 468 ER - TY - GEN A1 - Koch, Sandy A1 - Harlander, Uwe A1 - Egbers, Christoph T1 - Wave-attractors and mean flow in a spherical shell due to time-modulated rotation Y1 - 2010 ER - TY - CHAP A1 - Öngüner, Emir A1 - Zanoun, El-Sayed A1 - Fiorini, Tommaso A1 - Bellani, Gabriele A1 - Shahirpour, Amir A1 - Egbers, Christoph A1 - Talamelli, Alessandro ED - Örlü, Ramis ED - Talamelli, Alessandro ED - Peinke, Joachim ED - Oberlack, Martin T1 - Wavenumber Dependence of Very Large-Scale Motions in CICLoPE at 4800 ≤ Reτ ≤ 37.000 T2 - Progress in Turbulence VII, Proceedings of the iTi Conference in Turbulence 2016 Y1 - 2017 UR - https://link.springer.com/chapter/10.1007/978-3-319-57934-4_15 SN - 978-3-319-57933-7 SP - 101 EP - 106 PB - Springer CY - Cham ER - TY - CHAP A1 - Koch, Sandy A1 - Harlander, Uwe A1 - Hollerbach, Rainer A1 - Rabitti, A. A1 - Maas, L. R. M. A1 - Egbers, Christoph T1 - Wellen und Wellenattrktoren in einer Kugelschale mit zeitlich modulierter Rotation Y1 - 2010 ER - TY - CHAP A1 - Froitzheim, Andreas A1 - Merbold, Sebastian A1 - Egbers, Christoph T1 - Wide gap Taylor-Couette flow T2 - ICTW 19, Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany Y1 - 2015 SP - 28 EP - 29 CY - Cottbus ER - TY - CHAP A1 - Seelig, Torsten A1 - Harlander, Uwe A1 - Borcia, Ion-Dan A1 - Egbers, Christoph T1 - Zonal mean flow excitation due to inertial waves propagating in the meridional plane T2 - European Geosciences Union (EGU), 9th General Assembly, Vienna, Austria, 22-27 April Y1 - 2012 UR - http://meetingorganizer.copernicus.org/EGU2012/EGU2012-4981-1.pdf N1 - EGU2012-4981-1 ER - TY - THES A1 - Larcher, Thomas von T1 - Zur Stabilität barokliner Wellen im starr rotierenden Zylinderspalt Y1 - 2007 SN - 3-18-348607-6 PB - VDI-Verl. CY - Düsseldorf ER - TY - JOUR A1 - Travnikov, Vadim A1 - Egbers, Christoph T1 - Zur Stabiliät thermischer Konvektion im Kugelspalt unter Erdbedingungen Energietheorie Y1 - 2001 ER - TY - CHAP A1 - Uhlig, Benedict A1 - Kirner, Claus A1 - Preuß, Ann-Christin A1 - Graf, Johann A1 - Neben, Matthias T1 - Öltransport durch die Kolbenringe T2 - Abschluss- und Zwischenberichte der Forschungsstellen, gehalten auf der Informationstagung der FVV am 29. September 2016 in Madgeburg Y1 - 2016 SP - 197 EP - 230 PB - FVV, Forschungsvereinigung Verbrennungskraftmaschinen CY - Frankfurt ER - TY - JOUR A1 - Stücke, Peter A1 - Schwarz, M. A1 - Scurtu, Nicoleta A1 - Egbers, Christoph T1 - Über die exzentrische Zylinderspaltströmung bei engen Spaltweiten Y1 - 2006 ER -