Results 81 to 90 of about 510,808 (288)

Mechanical Flexibility Enables DNA Origami to Overcome Steric Confinement in Mucus

Advanced Science, EarlyView.
Mechanical flexibility is introduced as a design parameter to enhance nanocarrier transport in mucus. Using DNA origami, flexibility is decoupled from size, shap and surface chemistry, revealing improved passage through confined hydrogel networks. While surface passivation reduces aggregation, flexibility further boosts transport, offering a general ...
Matteo Tollemeto, Emily Tsang, Marie Karen Tracy Hong Lin, Luca Mannino, Kurt V. Gothelf, Anja Boisen   +5 more
wiley   +1 more source

Optimization and Experimental Testing of the Drag Torque Model Based on the Cavitation Effect

Jixie chuandong
In the non-braking operation of the wet brake in a heavy vehicle's hybrid power transmission system, the friction pair produces a drag torque due to the power loss caused by the viscous action of the oil.
Li Jie, Lian Hailong, Lan Hai, Wang Zhiyong   +3 more
doaj  

Prediction and optimization of drill string torque and drag in horizontal wells based on dynamic friction coefficient testing

Unconventional Resources
With the large-scale development of unconventional oil and gas resources, extended-reach horizontal wells have been increasingly utilized in shale reservoirs.
Chi Peng, Haoxuan Li, Yayun Zhang, Kehao Bo, Guofa Qiao   +4 more
doaj   +1 more source

Drag, lift and torque correlations for non-spherical particles from Stokes limit to high Reynolds numbers

International Journal of Multiphase Flow, 2018
Accurate direct numerical simulations are performed to determine the drag, lift and torque coefficients of non-spherical particles. The numerical simulations are performed using the lattice Boltzmann method with multi-relaxation time.
S. Sanjeevi, J. Kuipers, Jt Johan Padding   +2 more
semanticscholar   +1 more source

Emergent Spinning and Orbital Motion in Clustered Wind‐Assisted Flyers

Advanced Science, EarlyView.
Inspired by natural snowflake geometries, paper‐cut flyers exhibit geometry‐defined spinning and orbital motions during cluster formation in a wind tunnel. Collective flights of multiple paperflakes reveal dynamic clustering, fragmentation, and continuously evolving spin behaviors.
Bingnan Zhou, Rahul Chand, Fahad Ahmed Korai, Jianfeng Yang, Valtteri Savonen, Fan Liu, Qi Yang, Hao Zeng   +7 more
wiley   +1 more source

An estimation method of full scale performance for pulling type podded propellers

International Journal of Naval Architecture and Ocean Engineering, 2014
: This paper presents a new estimation method of full scale propulsive performance for the pulling type podded propeller. In order to estimate the drag of pod housing, a drag velocity ratio, which includes the effects of podded propeller loading and ...
Hyoung-Gil Park, Jung-Kyu Choi, Hyoung-Tae Kim   +2 more
doaj   +1 more source

Stochastic Entanglement of Deterministic Origami Tentacles For Robust Robotic Grasping

Advanced Science, EarlyView.
This study introduces an origami tentacle gripper to robustly grasp objects‐in air, underwater, and even in orbital space‐by exploiting a synergy between local, deterministic deformation programming and global, stochastic entanglements. A single origami tentacle can be designed to coil with a simple tendon pull.
Alec Boron, Bokun Zheng, Ziyang Zhou, Noel Naughton, Suyi Li   +4 more
wiley   +1 more source

Engineering Morphological Anisotropy to Control the In Vivo Transport Dynamics, Clearance, and Biodistribution of Silica Nanocarriers

Advanced Science, EarlyView.
Morphological anisotropy directs the in vivo transport under physiological flow and clearance of silica nanocarriers. Increasing anisotropy reduces cellular uptake, suppresses hepatic and splenic sequestration, and prolongs systemic circulation by steering particles toward the central flow core.
Xiaofei Li, Yingjie Yu, Tianchang He, Xiaoyan Fang, Wenhua Yang, Luying Zhou, Hao Fan, Guimei Lin, Daniel Crespy, Katharina Landfester, Junfeng Zhang, Shuai Jiang   +11 more
wiley   +1 more source

Drag Reduction Control for Torsion and Oscillation in Top Drive System Slide Drilling

Shiyou jixie, 2018
The domestic technology of drag reduction control for torsion and oscillation in top drive system (TDS) slide drilling is not yet mature. The torque limit and torsion angle during drilling are still set by experience, which is inconsistent with the ...
Li Qian, Ji Guodong, Zhang Hui, Ge Yunhua, Wang Bo, Cui Meng   +5 more
doaj  

Modeling of the Dynamics of Conical Separate Plates in a Wet Multi-Disc Clutch

Lubricants
Wet multi-disc clutches in transmission systems suffer from the incomplete separation of the friction components, which raises the drag torque and results in power loss and heightened fuel consumption.
Qin Zhao, Biao Ma, Cenbo Xiong, Liang Yu, Bing Fu, Shufa Yan   +5 more
doaj   +1 more source