Results 51 to 60 of about 114,827 (292)

Analysis of changes in the value of selected lubricant characteristics during use [PDF]

MATEC Web of Conferences, 2019
The problems connected with assessment of value changes of selected lubricants during the operation are addressed in this study. The lubricants which have been analyzed are engine oils used in internal combustion drive units of transport means.
Landowski Bogdan, Baran Monika
doaj   +1 more source

On the Ionisation Fraction in Protoplanetary Disks II: The Effect of Turbulent Mixing on Gas--phase Chemistry [PDF]

, 2005
We calculate the ionisation fraction in protostellar disk models using two different gas-phase chemical networks, and examine the effect of turbulent mixing by modelling the diffusion of chemical species vertically through the disk.
Balbus, Beckwith, Blaes, Carballido, Chiang, Fleming, Fromang, Gammie, Glassgold, Hawley, Hawley, Igea, Ilgner, Le Teuff, M. Ilgner, Matsumura, Muzerolle, Oppenheimer, Prosser, R. P. Nelson, Rawlings, Sano, Semenov, Wehrstedt, Wehrstedt, Willacy, Xie   +26 more
core   +4 more sources

Elimination of Necking and Aspect Ratio Dependence in Uniaxial Actuators by Continuous Fiber Reinforcement

Advanced Robotics Research, EarlyView.
A novel carbon fiber reinforcement for dielectric elastomer actuators enhances actuation force while decoupling electromechanical performance from the actuator's aspect ratio. Unlike conventional fiber reinforcements, it enables a uniform planar stretch state along the entire actuator.
Markus Koenigsdorff, Stefania Konstantinidi, Anett Endesfelder, Petr Osipov, Johannes Mersch, E.‐F. Markus Vorrath, Martina Zimmermann, Yves Perriard, Gerald Gerlach   +8 more
wiley   +1 more source

Analytical Method for Determining the Viscosity Index of Engine Lubricating Oils

Energies
This paper proposes a simple analytical method for determining the viscosity index (VI) that effectively aligns with results obtained from the applicable standards.
Leszek Chybowski, Marcin Szczepanek, Konrad Ćwirko, Konrad Marosek   +3 more
doaj   +1 more source

VISCOSITY OF TERNARY SOLUTIONS COMPOSED OF PROPYLENE GLYCOL, ETHANOL AND WATER

Holodilʹnaâ Tehnika i Tehnologiâ, 2016
This paper presents the experimental data on the kinematic viscosity of water / ethanol / propylene glycol solutions that are prospective as coolants. An experimental setup with capillary viscometers was used to measure the kinematic viscosity of samples
O. Ya. Khliyeva, A. S. Nikulina, A. S. Nikulina, M. P. Polyuganich, M. P. Polyuganich, S. S. Ryabikin, S. S. Ryabikin, V. P. Zhelezny, V. P. Zhelezny   +8 more
doaj   +1 more source

Hard‐Magnetic Soft Millirobots in Underactuated Systems

Advanced 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, Zixuan Zhang, Bingyan Li, Junkai Wang, Hongcheng Gu   +4 more
wiley   +1 more source

EFFECT OF HEATING INTERVAL AND CONTAMINATION WITH WATER ON STEAM TURBINE LUBRICANT VISCOSITY

Diyala Journal of Engineering Sciences, 2010
Several factors affect lubricant viscosity that make its value undesirable and out of the working range. This study includes the effect of two factors, heating interval and contamination with water, on kinematic viscosity at atmospheric pressure for ...
Shaker S. Hassan
doaj  

Analysis of the Effect of Biodiesel B20 and B100 on the Degradation of Viscosity and Total Base Number of Lubricating Oil in Diesel Engines with Long-Term Operation Using ASTM D2896 and ASTM D445-06 Methods

Teknik, 2020
Based on its characteristics, biodiesel has a higher density, viscosity, and acidity level than diesel fuel, so it has a disadvantages in terms of lubricants especially in the long run. The impact, it can decrease the kinematic viscosity of the lubricant,
Jayan Sentanuhady, Akmal Irfan Majid, W. Prashida, W. Saputro, N. P. Gunawan, T. Y. Raditya, Muhammad Akhsin Muflikhun   +6 more
doaj   +1 more source

Transition models for turbomachinery boundary layer flows : a review [PDF]

, 2017
Current models for transition in turbomachinery boundary layer flows are reviewed. The basic physical mechanisms of transition processes and the way these processes are expressed by model ingredients are discussed.
Dick, Erik, Kubacki, Slawomir
core   +2 more sources

3D Printing of Soft Robotic Systems: Advances in Fabrication Strategies and Future Trends

Advanced Robotics Research, EarlyView.
Collectively, this review systematically examines 3D‐printed soft robotics, encompassing material selections, function integration, and manufacturing methodologies. Meanwhile, fabrication strategies are analyzed in order of increasing complexity, highlighting persistent challenges with proposed solutions.
Changjiang Liu, Bin Cui, Xumin Huang, Xiaoyu (Rayne) Zheng, T. Thang Vo‐Doan, Ruirui Qiao   +5 more
wiley   +1 more source