155 citations · 653 across the 11 of their papers we have counts for
11 papers
Direct numerical simulations of turbulent drag reduction via piezoelectric actuation
Amir Amjadimanesh, Aman Kidanemariam, David Chappell +2
We have conducted Direct Numerical Simulations of turbulent half-channel flow over realistic surface deformations at friction Reynolds number . We generated the surface d…
Results from Particle-Resolved Simulations
Agathe Chouippe, Aman G. Kidanemariam, Jos Derksen +2
We review some of the results obtained to date with the aid of the PR-DNS approach to turbulent particulate flows. It is shown that the method has matured to a point which allows t…
Pressure drag reduction via imposition of spanwise wall oscillations on a rough wall
Rahul Deshpande, Aman G. Kidanemariam, Ivan Marusic
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 transitiona…
On the role of turbulent large-scale streaks in generating sediment ridges
Markus Scherer, Markus Uhlmann, Aman G. Kidanemariam +1
The role of turbulent large-scale streaks in forming subaqueous sediment ridges on an initially flat sediment bed is investigated with the aid of particle-resolved direct numerical…
On the scaling of the instability of a flat sediment bed with respect to ripple-like patterns
Markus Scherer, Aman G. Kidanemariam, Markus Uhlmann
We investigate the formation of subaqueous transverse bedforms in turbulent open channel flow by means of direct numerical simulations with fully-resolved particles. The main goal…
Direct numerical simulations of ripples in an oscillatory flow
Marco Mazzuoli, Aman G. Kidanemariam, Markus Uhlmann
Sea ripples are small-scale bedforms which originate from the interaction of an oscillatory flow with an erodible sand bed. The phenomenon of sea ripple formation is investigated b…
Formation of sediment patterns in channel flow: minimal unstable systems and their temporal evolution
Aman G. Kidanemariam, Markus Uhlmann
The phenomenon of sediment pattern formation in a channel flow is numerically investigated by performing simulations which resolve all the relevant scales of the problem. The numer…
Interface-resolved direct numerical simulation of the erosion of a sediment bed sheared by laminar channel flow
Aman G. Kidanemariam, Markus Uhlmann
A numerical method based upon the immersed boundary technique for the fluid-solid coupling and on a soft-sphere approach for solid-solid contact is used to perform direct numerical…
Direct numerical simulation of pattern formation in subaqueous sediment
Aman G. Kidanemariam, Markus Uhlmann
We present results of direct numerical simulation of incompressible fluid flow over a thick bed of mobile, spherically-shaped particles. The algorithm is based upon the immersed bo…
DNS of horizontal open channel flow with finite-size, heavy particles at low solid volume fraction
Aman G. Kidanemariam, Clemens Chan-Braun, Todor Doychev +1
We have performed direct numerical simulation of turbulent open channel flow over a smooth horizontal wall in the presence of finite-size, heavy particles. The spherical particles…
DNS of vertical plane channel flow with finite-size particles: Voronoi analysis, acceleration statistics and particle-conditioned averaging
Manuel Garcia-Villalba, Aman G. Kidanemariam, Markus Uhlmann
We have performed a direct numerical simulation of dilute turbulent particulate flow in a vertical plane channel, fully resolving the phase interfaces. The flow conditions are the…