Results 91 to 100 of about 32,763 (309)

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

open access: yesAdvanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui   +5 more
wiley   +1 more source

Evaluation of bed shear stress under turbid flows through measures of flow deceleration

open access: yes, 2006
In previous work it has been observed that the direct application of the law-of-the-wall in flows of high concentrations of cohesive sediments, results in overestimation of the bed shear stress.
Angelaki, M.
core  

Strong‐Magnetic Flexible Composites for Magnetically Responsive Soft Robots

open access: yesAdvanced Robotics Research, EarlyView.
This perspective provides an overview of the performance mechanisms, preparation methods, and applications of strong magnetic flexible composite materials in soft actuators (such as gripping, movement, and sensing), and further explores current opportunities and challenges.
Wenwen Li   +4 more
wiley   +1 more source

Hard‐Magnetic Soft Millirobots in Underactuated Systems

open access: yesAdvanced Robotics Research, EarlyView.
This review provides a comprehensive overview of hard‐magnetic soft millirobots in underactuated systems. It examines key advances in structural design, physics‐informed modeling, and control strategies, while highlighting the interplay among these domains.
Qiong Wang   +4 more
wiley   +1 more source

An investigation into unsteady base bleed for drag reduction in bluff two-box SUVs

open access: yes, 2009
This paper discusses a preliminary investigation into the use of base bleed on a production SUV using CFD analysis. The paper shows the methods used in creating the computational model and conducting the analysis, and present the findings to date.
Kennedy, Johnathan J.   +4 more
core  

Drag Coefficient for Stokes Flow

open access: yes, 2022
Although the flow around a sphere is a problem well-understood at all ranges of Reynolds number, the flow around a cylinder is an unresolved problem at creeping flow conditions. At creeping flow, Reynolds number is small, typically less than one. Because
Patel, Aadarshi
core  

Multimodal Locomotion in Insect‐Inspired Microrobots: A Review of Strategies for Aerial, Surface, Aquatic, and Interfacial Motion

open access: yesAdvanced Robotics Research, EarlyView.
This review identifies key design considerations for insect‐inspired microrobots capable of multimodal locomotion. To draw inspiration, biological and robotic strategies for moving in air, on water surfaces, and underwater are examined, along with approaches for crossing the air–water interface.
Mija Jovchevska   +2 more
wiley   +1 more source

Case study of wave dependent drag coefficient in the Baltic Sea

open access: yesMeteorologische Zeitschrift, 2000
Proper estimation of air flow over sea waves plays a key role in wave, storm surge, wind field prediction. Most hydrological models assume the drag coefficient Cd to be dependent only on the local wind speed. However this is a simplification.
Barbara Paplinska
doaj   +1 more source

Drag modulation by inertial particles in a drag-reduced turbulent channel flow with spanwise wall oscillation

open access: yes
Harmonic oscillations of the walls of a turbulent plane channel flow laden with inertial particles are studied by point-particle direct numerical simulation to improve our understanding of the physical mechanism for friction drag reduction.
Gao, Wei, Parsani, Matteo, Wang, Minmiao
core   +1 more source

Satellite Drag Coefficient modeling for Thermosphere Science and Mission Operations

open access: yes, 2022
Satellite drag modeling remains the largest source of uncertainty affecting space operations in low Earth orbit. The uncertainty stems from inaccurate models for mass density and drag coefficient.
Mehta, Piyush M. (author)   +21 more
core   +1 more source

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