14 citations · 27 across the 9 of their papers we have counts for
9 papers
Delaying transition induced by a strip of distributed roughness using additional fine grit roughness
Robin Joseph, P Phani Kumar, Sourabh S Diwan
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…
A wavelet-based detector function for characterizing intermittent velocity signals
Satyajit De, Aditya Anand, Sourabh S. Diwan
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 deri…
Absolute and "upstream" convective instabilities in plane Couette-Poiseuille flow
Kirthy K. Srinivas, Sourabh S. Diwan
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 fi…
Direct numerical simulation of a moist cough flow using Eulerian approximation for liquid droplets
Rohit Singhal, S. Ravichandran, Sourabh S. Diwan
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-g…
Predominance of pressure transport in spatial energy budget for a mixing layer approaching absolute instability
A. B. Aadhishwaran, Sourabh S. Diwan
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 framew…
Virus transmission by aerosol transport during short conversations
Rohit Singhal, S. Ravichandran, Rama Govindarajan +1
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 perf…
Instability Mechanisms and Intermittency Distribution in Adverse Pressure Gradient Attached and Separated Boundary Layers
A. Samson, Karthik Naicker, Sourabh S. Diwan
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 pre…
Laboratory Investigations of the Dynamics of Anomalous Entrainment in Cumulus-cloud flows
Sourabh S. Diwan, Roddam Narasimha, G. S. Bhat +1
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 majo…
Intermediate Scaling and Logarithmic Invariance in Turbulent Pipe Flow
Sourabh S. Diwan, Jonathan F. Morrison
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 regio…