Direct Numerical Simulation of Very-Large-Scale Motions in Turbulent Pipe Flow
Seiten
2021
Cuvillier Verlag
978-3-7369-7369-5 (ISBN)
Cuvillier Verlag
978-3-7369-7369-5 (ISBN)
Turbulent pipe flow is not only of importance to engineering applications but also of fundamental interest to the study of wall-bounded turbulence. In the present work, the interaction of the so-called very-large-scale motions (VLSMs) with the near-wall, small-scale turbulence is explored by means of direct numerical simulation for friction Reynolds numbers up to Reτ = 2880 and pipe lengths up to L = 42R. Besides, the convergence and the scaling of different order moments of the velocity distribution are studied and also discussed with regard to VLSMs. The subsequent analysis of the streamwise energy budget equation of the filtered velocity field reveals that VLSMs obtain their energy from the mean velocity field via a production mechanism similar to the one known from the near-wall cycle. Moreover, the different energy budget terms are investigated by means of statistical averages, instantaneous flow field visualisations, and three-dimensional correlations, wherein the backscattering phenomenon is also dealt with. In brief, the research sheds new light on our understanding of the interaction between VLSMs and the near-wall cycle and leads to a better grasp of turbulent pipe flow in general.
| Erscheinungsdatum | 27.02.2021 |
|---|---|
| Verlagsort | Göttingen |
| Sprache | englisch |
| Maße | 148 x 210 mm |
| Themenwelt | Naturwissenschaften ► Physik / Astronomie ► Thermodynamik |
| Technik ► Maschinenbau | |
| Schlagworte | Anschlagdynamik • Anschlagdynamikspitzen • Auswürfe • Backscattering • boundary layer • Coherent Structures • convergence • cut-off filter • cylindrical coordinates • Diffusion • Direct Numerical Simulation • Direkte numerische Simulation • Dissipation • domain length • Domänenlänge • Ein-Punkt-Statistiken • ejections • Energiehaushalt • Energiekaskade • energy budget • energy cascade • Fertigung • finite-volume scheme • Flachheit • Flatness • Fluidbewegung • Fluid Motion • Geschwindigkeitskorrelation • Geschwindigkeitsnocken • Geschwindigkeitsschlieren • Grenzschicht • high-order statistics • höherwertige Statistik • inter-scale energy flux • interskaliger Energiefluss • kleinräumige Bewegungen • Konvergenz • Leapfrog-Euler scheme • Navier-Stokes Equation • Navier-Stokes-Gleichung • near-wall cycle • one-point statistics • outer-flow region • Production • Reynolds Belastung • Reynolds number dependence • Reynolds stresses • Reynoldszahl-Abhängigkeit • Rohrströmung • Rückstreuung • scale interaction • scaling • Schieflage • schlüssige Strukturen • sehr großräumige Bewegungen • Skaleninteraktion • Skalierung • Skewness • small-scale motions • Sperrfilter • Streuung • Strömungsgeometrie • sweeps • Turbulence • Turbulente kinetische Energie • turbulente Rohrströmung • turbulent kinetic energy • turbulent pipe flow • Turbulenz • two-point statistics • velocity correlation • velocity spikes • velocity streaks • very-large-scale motions • Wall-Bounded Turbulence • wandgebundene Turbulenz • wandnaher Zyklus • Zweipunkt-Statistiken • Zylinderkoordinaten |
| ISBN-10 | 3-7369-7369-1 / 3736973691 |
| ISBN-13 | 978-3-7369-7369-5 / 9783736973695 |
| Zustand | Neuware |
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Buch | Softcover (2023)
De Gruyter Oldenbourg (Verlag)
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