80 citations · 260 across the 20 of their papers we have counts for
21 papers
Optimal airfoils in the intermediate Reynolds number range
Gleb Zhdanko, Dmitry Kolomenskiy
We revisit a classical airfoil design problem: the search for shapes that maximize aerodynamic performance metrics, targeting the underexplored intermediate Reynolds-number regime…
An experimental data-driven mass-spring model of flexible Calliphora wings
Hung Truong, Thomas Engels, Henja Wehmann +3
Insect wings can undergo significant deformation during flapping motion owing to inertial, elastic and aerodynamic forces. Changes in shape then alter aerodynamic forces, resulting…
Super-Resolution of Near-Surface Temperature Utilizing Physical Quantities for Real-Time Prediction of Urban Micrometeorology
Yuki Yasuda, Ryo Onishi, Yuichi Hirokawa +2
The present paper proposes a super-resolution (SR) model based on a convolutional neural network and applies it to the near-surface temperature in urban areas. The SR model incorpo…
Fluid-structure interaction using volume penalization and mass-spring models with application to flapping bumblebee flight
Hung Truong, Thomas Engels, Dmitry Kolomenskiy +1
Wing flexibility plays an essential role in the aerodynamic performance of insects due to the considerable deformation of their wings during flight under the impact of inertial and…
Burst-and-coast swimmers optimize gait by adapting unique intrinsic cycle
G. Li, I. Ashraf, B. François +4
This paper addresses the physical mechanism of intermittent swimming by considering the burst-and-coast regime of fish swimming at different speeds. The burst-and-coast regime cons…
A mass-spring fluid-structure interaction solver: Application to flexible revolving wings
Hung Truong, Thomas Engels, Dmitry Kolomenskiy +1
The secret to the spectacular flight capabilities of flapping insects lies in their wings, which are often approximated as flat, rigid plates. Real wings are however delicate struc…
The impact of turbulence on flying insects in tethered and free flight: high-resolution numerical experiments
Thomas Engels, Dmitry Kolomenskiy, Kai Schneider +3
Flapping insects are remarkably agile fliers, adapted to a highly turbulent environment. We present a series of high resolution numerical simulations of a bumblebee interacting wit…
WaveRange: Wavelet-based data compression for three-dimensional numerical simulations on regular grids
Dmitry Kolomenskiy, Ryo Onishi, Hitoshi Uehara
A wavelet-based method for compression of three-dimensional simulation data is presented and its software framework is described. It uses wavelet decomposition and subsequent range…
Helical vortices generated by flapping wings of bumblebees
T. Engels, D. Kolomenskiy, K. Schneider +3
High resolution direct numerical simulations of rotating and flapping bumblebee wings are presented and their aerodynamics is studied focusing on the role of leading edge vortices…
Numerical simulation of vortex-induced drag of elastic swimmer models
T. Engels, D. Kolomenskiy, K. Schneider +1
We present numerical simulations of simplified models for swimming organisms or robots, using chordwise flexible elastic plates. We focus on the tip vortices originating from three…
Bees with attitude: the effect of gusts on flight dynamics
Timothy Jakobi, Dmitry Kolomenskiy, Teruaki Ikeda +4
Flight is a complicated task at small scales in part due to the ubiquitous unsteady air which contains it. Flying organisms deal with these difficulties using active and passive co…
Closed-form solution for the edge vortex of a revolving plate
Di Chen, Dmitry Kolomenskiy, Hao Liu
Flapping and revolving wings can produce attached leading edge vortices (LEVs) when the angle of attack is large. In this work, a low order model is proposed for the edge vortices…
Added costs of insect-scale flapping flight in unsteady airflows
Dmitry Kolomenskiy, Sridhar Ravi, Taku Takabayashi +8
The aerial environment in the operating domain of small-scale natural and artificial flapping wing fliers is highly complex, unsteady and generally turbulent. Considering flapping…
Bumblebees minimize control challenges by combining active and passive modes in unsteady winds
Sridhar Ravi, Dmitry Kolomenskiy, Thomas Engels +4
The natural wind environment that volant insects encounter is unsteady and highly complex, posing significant flight control and stability challenges. Unsteady airflows can range f…
Bumblebee flight in heavy turbulence
T. Engels, D. Kolomenskiy, K. Schneider +2
High-resolution numerical simulations of a tethered model bumblebee in forward flight are performed superimposing homogeneous isotropic turbulent fluctuations to the uniform inflow…
FluSI: A novel parallel simulation tool for flapping insect flight using a Fourier method with volume penalization
Thomas Engels, Dmitry Kolomenskiy, Kai Schneider +1
FluSI, a fully parallel open source software for pseudo-spectral simulations of three-dimensional flapping flight in viscous flows, is presented. It is freely available for non-com…
Aerodynamic ground effect in fruitfly sized insect takeoff
Dmitry Kolomenskiy, Masateru Maeda, Thomas Engels +3
Aerodynamic ground effect in flapping-wing insect flight is of importance to comparative morphologies and of interest to the micro-air-vehicle (MAV) community. Recent studies, howe…
Leading-edge vortex shedding from rotating wings
Dmitry Kolomenskiy, Yossef Elimelech, Kai Schneider
The paper presents a numerical investigation of the leading-edge vortices generated by rotating triangular wings at Reynolds number . A series of three-dimensional numerica…
Analysis and discretization of the volume penalized Laplace operator with Neumann boundary conditions
Dmitry Kolomenskiy, Romain Nguyen van yen, Kai Schneider
We study the properties of an approximation of the Laplace operator with Neumann boundary conditions using volume penalization. For the one-dimensional Poisson equation we compute…
Adaptive gradient-augmented level set method with multiresolution error estimation
Dmitry Kolomenskiy, Jean-Christophe Nave, Kai Schneider
A space-time adaptive scheme is presented for solving advection equations in two space dimensions. The gradient-augmented level set method using a semi-Lagrangian formulation with…
Approximation of the Laplace and Stokes operators with Dirichlet boundary conditions through volume penalization: a spectral viewpoint
Romain Nguyen van yen, Dmitry Kolomenskiy, Kai Schneider
We report the results of a detailed study of the spectral properties of Laplace and Stokes operators, modified with a volume penalization term designed to approximate Dirichlet con…