Zobrazeno 1 - 10
of 369
pro vyhledávání: '"Marusic, Ivan"'
Autor:
Nagib, Hassan, Marusic, Ivan
Recently, Nagib et al (2024} utilized indicator functions of profiles of the streamwise normal stress to reveal the ranges of validity, in wall distance and Reynolds number, for each of two proposed models in Direct Numerical Simulations (DNS) of cha
Externí odkaz:
http://arxiv.org/abs/2410.23669
The amplitude modulation phenomena, defined originally by Mathis et al. (J. Fluid Mech., 628, 311-337; 2009), corresponds to a unique non-linear interaction between Reynolds number ($Re_{\tau}$) dependent large-scale motions and $Re_{\tau}$-invariant
Externí odkaz:
http://arxiv.org/abs/2409.00154
A phenomenological description is presented to explain the intermediate and low-frequency/large-scale contributions to the wall-shear-stress (${\tau}_w$) and wall-pressure (${p}_w$) spectra of canonical turbulent boundary layers, which are well known
Externí odkaz:
http://arxiv.org/abs/2406.15733
Wall-scaled (attached) eddies play a significant role in the overall drag experienced in high-Reynolds-number turbulent boundary layers (TBLs). This study aims to delve into the underlying mechanisms driving this phenomenon by dissecting the active a
Externí odkaz:
http://arxiv.org/abs/2404.18506
Publikováno v:
Journal of Fluid Mechanics 2024, Volume 979, A21
The present study tests the efficacy of the well-known viscous drag reduction strategy of imposing spanwise wall oscillations to reduce pressure drag contributions in a transitional- and fully-rough turbulent wall flow. This is achieved by conducting
Externí odkaz:
http://arxiv.org/abs/2308.13716
Autor:
Li, Mogeng, de Silva, Charitha M., Chung, Daniel, Pullin, Dale I., Marusic, Ivan, Hutchins, Nicholas
Publikováno v:
Journal of Fluid Mechanics, 923, A18 (2021)
This study presents an experimental dataset documenting the evolution of a turbulent boundary layer downstream of a rough-to-smooth surface transition. To investigate the effect of upstream flow conditions, two groups of experiments are conducted. Fo
Externí odkaz:
http://arxiv.org/abs/2308.02890
Autor:
Li, Mogeng, de Silva, Charitha M., Rouhi, Amirreza, Baidya, Rio, Chung, Daniel, Marusic, Ivan, Hutchins, Nicholas
Publikováno v:
Journal of Fluid Mechanics, 872, 472-491 (2019)
This paper examines recovery of the wall-shear stress of a turbulent boundary layer that has undergone a sudden transition from a rough to a smooth surface. Early works of Antonia and Luxton questioned the reliability of standard smooth-wall methods
Externí odkaz:
http://arxiv.org/abs/2308.01777
We investigate the underlying physics behind the change in amplitude modulation coefficient in non-canonical wall-bounded flows in the framework of the inner-outer interaction model (IOIM) (Baars et al., Phys. Rev. Fluids 1 (5), 054406). The IOIM cap
Externí odkaz:
http://arxiv.org/abs/2304.13707
Publikováno v:
Physical Review Fluids 8, 124604, 2023
We study the Reynolds-number effects on the outer region of moderate adverse-pressure-gradient (APG) turbulent boundary layers (TBLs) and find that their small scale energy reduces with increasing friction Reynolds-number ($Re_{\tau}$). The trend is
Externí odkaz:
http://arxiv.org/abs/2304.08714
Autor:
Cremades, Andres, Hoyas, Sergio, Deshpande, Rahul, Quintero, Pedro, Lellep, Martin, Lee, Will Junghoon, Monty, Jason, Hutchins, Nicholas, Linkmann, Moritz, Marusic, Ivan, Vinuesa, Ricardo
Despite its great scientific and technological importance, wall-bounded turbulence is an unresolved problem in classical physics that requires new perspectives to be tackled. One of the key strategies has been to study interactions among the energy-c
Externí odkaz:
http://arxiv.org/abs/2302.01250