Results 91 to 100 of about 60,299 (304)

Physico-mathematical modeling methods for the pressure distribution determination in the gas-dynamic bearing gap of the ball gyroscope

MATEC Web of Conferences, 2017
The considering problem in the article connects with solution methods of the specific questions in gas-dynamic lubrication theory. The comparative analysis of analytical and numerical methods for the calculating gas-dynamic bearing characteristics is ...
Ignatovskaya Anastasiya, Golikov Alexey
doaj   +1 more source

Droplet migration in a Hele-Shaw cell: Effect of the lubrication film on the droplet dynamics

, 2016
Droplet migration in a Hele--Shaw cell is a fundamental multiphase flow problem which is crucial for many microfluidics applications. We focus on the regime at low capillary number and three-dimensional direct numerical simulations are performed to ...
Fullana, Jose-Maria, Josserand, Christophe, Ling, Yue, Popinet, Stéphane   +3 more
core   +4 more sources

A Shear Thickening Colloidal Suspension Functioning via Progressive Impact Jamming with Persistent Lubrication Layer

Advanced Science, EarlyView.
An ionic liquid‐based shear‐thickening fluid (ILSTF) exhibits lubricated dynamics from strong shear thickening to impact‐triggered jamming. A persistent nanometric solvation layer around silica governs both the shear thickening saturation in rheology and jamming front propagation under dynamic impact compression.
Yiran Wu, Yifeng Yu, Yiqiu Zhao, Qin Xu, T. X. Yu, Xin Zhang, Jinglei Yang   +6 more
wiley   +1 more source

On the Influence of the Convective Term in the Navier–Stokes Equation on the Forces in Hydrodynamic Bearings

Lubricants
Many theories describing the flow of viscous fluids in thin lubrication layers during rotor motion inside a stator, including the influence of the convective term in the Navier–Stokes equation, are known and widely used.
Jiří Vacula, Pavel Novotný
doaj   +1 more source

Influence of surface roughness and waviness on film thickness and pressure distribution in elastohydrodynamic contacts [PDF]

The Christensen theory of a stochastic model for hydrodynamic lubrication of rough surfaces was extended to elastohydrodynamic lubrication between two rollers.
Cheng, H. S., Chow, L. S. H.
core   +1 more source

Wet gum labelling of wine bottles [PDF]

, 1996
It is shown that bubbling on wine bottle labels is due to absorption of water from the glue, with subsequent hygroscopic expansion. Contrary to popular belief, most of the glue's water must be lost to the atmosphere rather than to the paper.
Broadbridge, P., Chan, D.
core  

Combining the Pitcher and Lotus Plant: Supericephobic and Superhydrophobic Silicone Films

Advanced Science, EarlyView.
Based on bench‐top nanomolding of polydimethylsiloxane (PDMS) with optimized silicone oil content, we developed hierarchically structured silicone films by essentially combining the properties of the lotus and pitcher plant; particularly we are able to achieve water contact angle as high as 171° and ice adhesion strength as low as 11.5 kPa (i.e ...
Cliff L. W. Ng, Joshua Ham, Sanpreet Kaur, Clayton W. Schultz, Hua‐Zhong Yu   +4 more
wiley   +1 more source

Data set for determination of lubrication film thickness and lubrication state between bone and Ti–6Al–4V interface under three biolubrications

Data in Brief, 2019
The lubrication states between the friction pairs in lubrications have an important effect on its tribological behavior. Therefore, the aim of this complementary data article is to identify the corresponding lubrication states between bone and Ti–6Al–4V ...
Chenchen Wang, Gangqiang Zhang, Zhipeng Li, Xiangqiong Zeng, Yong Xu, Shichang Zhao, Hongxing Hu, Yadong Zhang, Tianhui Ren   +8 more
doaj   +1 more source

Orientation‐Confinement‐Engineered Stabilization of Ferroelectricity in HfO2 toward Maximum Polarization

Advanced Science, EarlyView.
Ferroelectric phase stability in Hf₀.5Zr₀.5O2 films is enhanced by confinement to the (111) crystal orientation, as demonstrated by first‐principles calculations and experiments. Polarization approaching its maximum value is achieved through selective ferroelectric switching paths, which are further tuned by oxygen vacancies and cation doping to ...
Fatoye Sawyerr, Yongqing Sun, Zekun Zhang, Kang Jia, Shuning Lv, Qi Hu, Shu Shi, Qiushi Huang, Xie Zhang, Xiaoli Fan, Li‐min Liu, Shifeng Wen, Zheng Wen, Tengfei Cao, Jingsheng Chen   +14 more
wiley   +1 more source

Improved Box Models for Newtonian and Power-Law Viscous Gravity Currents in Rectangular and Axisymmetric Geometries

Fluids
We consider the flow of gravity currents of Newtonian and power-law non-Newtonian viscous fluids, injected over a horizontal boundary in rectangular and cylindrical (axisymmetric) systems. We focus on some novel box model (BM) predictions.
M. Ungarish
doaj   +1 more source