Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Diwan, Sourabh S."'
Delaying transition induced by a strip of distributed roughness using additional fine grit roughness
Distributed roughness occurs on aerodynamic surfaces like wind/gas turbine blades and aircraft wings causing early boundary layer transition resulting in a reduction of the lift-to-drag ratio/power production. Despite being a recurring theme in engin
Externí odkaz:
http://arxiv.org/abs/2302.09797
In this work, we propose a new detector function based on wavelet transform to discriminate between turbulent and non-turbulent regions in an intermittent velocity signal. The derivative-based detector function, which is commonly used in intermittenc
Externí odkaz:
http://arxiv.org/abs/2212.14576
Autor:
Srinivas, Kirthy K., Diwan, Sourabh S.
Here we report some interesting new features of the spatio-temporal instability of the incompressible plane Couette-Poiseuille flow (CPF). First of all, this flow represents the first instance of a "non-inflectional" absolute instability, within cons
Externí odkaz:
http://arxiv.org/abs/2202.08467
The COVID-19 pandemic has inspired several studies on the fluid dynamics of respiratory events. Here, we propose a computational approach in which respiratory droplets are coarse-grained into an Eulerian liquid field advected by the fluid streamlines
Externí odkaz:
http://arxiv.org/abs/2110.01875
Pathogens like the SARS-CoV-2 are transmitted not only through violent expiratory events like coughing, but also through routine activities like breathing/speaking/singing. We perform direct numerical simulations of the turbulent transport of potenti
Externí odkaz:
http://arxiv.org/abs/2103.16415
Autor:
Aadhishwaran, A. B., Diwan, Sourabh S.
Publikováno v:
Phys. Rev. Fluids 6, 091901 (2021)
In this letter, we report the outcome of a spatial energy budget performed for the linear convective instability of the plane incompressible mixing layer within the inviscid framework. We find that, as the critical condition for the onset of absolute
Externí odkaz:
http://arxiv.org/abs/2103.14279
Direct numerical simulation has been carried out on one attached and two separated boundary layer flows (involving small and large separation) under the influence of an adverse pressure gradient. A unified picture of the pre-transitional boundary lay
Externí odkaz:
http://arxiv.org/abs/2103.09105
Publikováno v:
In International Journal of Heat and Fluid Flow October 2023 103
Anomalous entrainment in cumulus clouds has been a topic of investigation over many decades in the past. Its importance stems from the fact that entrainment rate is one of the major inputs to several cumulus-parameterization schemes. Recently Narasim
Externí odkaz:
http://arxiv.org/abs/1911.10828
Publikováno v:
J. Fluid Mech. 913 (2021) R1
A three-layer asymptotic structure for turbulent pipe flow is proposed, revealing in terms of intermediate variables, the existence of a Reynolds-number invariant logarithmic region. It provides a theoretical foundation for addressing important quest
Externí odkaz:
http://arxiv.org/abs/1909.11951