Publications related to Aerodynamics

Aerodynamic study of a Hyperloop pod equipped with compressor to overcome the Kantrowitz limit

This paper describes an investigation of the aerodynamic performance of a Hyperloop pod equipped with an axial compressor using CFD simulation. The compressor is expected to reduce the drag if the operational speed of the pod exceeds the Kantrowitz Limit ( ...

2021

Tree effects on urban microclimate: Diurnal, seasonal, and climatic temperature differences explained by separating radiation, evapotranspiration, and roughness effects

Gabriele Manoli, Matthias Roth, Paolo Burlando

Increasing urban tree cover is an often proposed mitigation strategy against urban heat as trees are expected to cool cities through evapotranspiration and shade provision. However, trees also modify wind flow and urban aerodynamic roughness, which can pot ...

2021

Three-dimensional fluid-driven stable frictional ruptures

Brice Tanguy Alphonse Lecampion, Alexis Alejandro Sáez Uribe

We investigate the quasi-static growth of a fluid-driven frictional shear crack that propagates in mixed mode (II+III) on a planar fault interface that separates two identical half-spaces of a three-dimensional solid. The fault interface is characterized b ...

2021

A Multimodal, Enveloping Soft Gripper: Shape Conformation, Bioinspired Adhesion, and Expansion-Driven Suction

Yufei Hao, Shantonu Biswas

A key challenge in robotics is to create efficient methods for grasping objects with diverse shapes, sizes, poses, and properties. Grasping with hand-like end effectors often requires careful selection of hand orientation and finger placement. Here, we pre ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2021

Mixing and diffusion for rough shear flows

Maria Colombo, Klaus Martin Widmayer

This article addresses mixing and diffusion properties of passive scalars advected by rough (

C^\alpha

) shear flows. We show that in general, one cannot expect a rough shear flow to increase the rate of inviscid mixing to more than that of a smooth shear ...

2021

A snowfall downscaling scheme for mountainous terrain

Michael Lehning

In mountainous terrain, the spatial and temporal variability of the snow cover is driven by the interaction of meteorological processes with the underlying topography. Typically, terrain-precipitation-wind interactions predominantly shape the spatial snow ...

2021

Predicting unsteady flow separation in response to a flow disturbance

Karen Ann J Mulleners, Julien Dominique Claude Deparday, Sabrina Henne, Guosheng He

We present here a summary of the activities and results of dynamically stalling airfoils from the UNFoLD lab at EPFL that have been presented at the meetings of the NATO AVT-282 discussion group on Unsteady aerodynamic response of rigid wings in gust encou ...

American Institute of Aeronautics and Astronautics, Inc2020

Dynamic stall on an airfoil undergoing VAWT blade angle of attack variations

Karen Ann J Mulleners, Sébastien Le Fouest, Sabrina Henne

Vertical axis wind turbines have several attractive features in the context of energy production in urban areas, but the inherent aerodynamic complexity of the flow around them has challenged their development on a larger scale. They generally operate at l ...

2020

A bioinspired Separated Flow wing provides turbulence resilience and aerodynamic efficiency for miniature drones

Stefano Mintchev, Matteo Di Luca

Small-scale drones have enough sensing and computing power to find use across a growing number of applications. However, flying in the low-Reynolds number regime remains challenging. High sensitivity to atmospheric turbulence compromises vehicle stability ...

AMER ASSOC ADVANCEMENT SCIENCE2020

Physical Mechanism and Flow Control of Tip Vortex Cavitation

Ali Amini

Occurrence of cavitation in hydraulic machines is a challenging issue because it is often accompanied with loss of efficiency, noise emissions, vibrations, and erosion damages. Tip vortices, in particular, are an ideal site for the development of cavitatio ...

EPFL2020

Aerodynamics

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Aerodynamic study of a Hyperloop pod equipped with compressor to overcome the Kantrowitz limit

Tree effects on urban microclimate: Diurnal, seasonal, and climatic temperature differences explained by separating radiation, evapotranspiration, and roughness effects

Three-dimensional fluid-driven stable frictional ruptures

A Multimodal, Enveloping Soft Gripper: Shape Conformation, Bioinspired Adhesion, and Expansion-Driven Suction

Mixing and diffusion for rough shear flows

A snowfall downscaling scheme for mountainous terrain

Predicting unsteady flow separation in response to a flow disturbance

Dynamic stall on an airfoil undergoing VAWT blade angle of attack variations

A bioinspired Separated Flow wing provides turbulence resilience and aerodynamic efficiency for miniature drones

Physical Mechanism and Flow Control of Tip Vortex Cavitation

Tree effects on urban microclimate: Diurnal, seasonal, and climatic temperature differences explained by separating radiation, evapotranspiration, and roughness effects

Three-dimensional fluid-driven stable frictional ruptures

Aerodynamic study of a Hyperloop pod equipped with compressor to overcome the Kantrowitz limit

Mixing and diffusion for rough shear flows

A snowfall downscaling scheme for mountainous terrain

Dynamic stall on an airfoil undergoing VAWT blade angle of attack variations

A bioinspired Separated Flow wing provides turbulence resilience and aerodynamic efficiency for miniature drones

Physical Mechanism and Flow Control of Tip Vortex Cavitation

A Multimodal, Enveloping Soft Gripper: Shape Conformation, Bioinspired Adhesion, and Expansion-Driven Suction

Predicting unsteady flow separation in response to a flow disturbance