Results 31 to 40 of about 203,745 (355)
Coulomb drag in graphene: perturbation theory
, 2012 We study the effect of Coulomb drag between two closely positioned graphene monolayers. In the limit of weak electron-electron interaction and small inter-layer spacing ($\mu_{1(2)}, T\ll v/d$) the drag is described by a universal function of the ...
Gornyi, I. V. +3 more
core +1 more source
DRAG COEFFICIENT OF VEGETATION IN FLOW MODELING [PDF]
Coastal Engineering Proceedings, 2012 Flow through vegetation has a significant impact on sediment transport and ecosystem robustness in the coastal and fluvial environment. Numerical models (Nepf and Vivoni, 2000; Uittenbogaaard, 2003) have been developed to simulate this type of flow. The success of these models depends on proper characterization of the main processes and appropriate ...
Hu, Z. (author) +3 more
openaire +2 more sources
Surface Tension Measurement of Ti‐6Al‐4V by Falling Droplet Method in Oxygen‐Free Atmosphere
Advanced Engineering Materials, EarlyView.In this article, the temperature‐dependent surface tension of free falling, oscillating Ti‐6Al‐4V droplets is investigated in both argon and monosilane doped, oxygen‐free atmosphere. Droplet temperature and oscillation are captured with one single high‐speed camera, and the surface tension is calculated with Rayleigh's formula.
Johannes May +9 more
wiley +1 more source
Space WeatherSatellite drag coefficients are crucial for determining the neutral mass densities that affect spacecraft operations in the thermosphere. Many studies typically utilize a constant drag coefficient of 2.2 to calculate the neutral density.
Xin Wang +9 more
doaj +1 more source
气体物理Drag reduction for flows over blunt bodies has always been a hot topic of research in aerospace and other fields, which is very important to improve aircraft performance and reduce energy consumption.
Qiujing HU, Yan WANG
doaj +1 more source
Numerical calculation of boundary layers and wake characteristics of high-speed trains with different lengths. [PDF]
PLoS ONE, 2017 Trains with different numbers of cars running in the open air were simulated using the delayed detached-eddy simulation (DDES). The numbers of cars included in the simulation are 3, 4, 5 and 8.
Lirong Jia, Dan Zhou, Jiqiang Niu
doaj +1 more source
Can solar wind viscous drag account for CME deceleration?
, 2012 The forces acting on solar Coronal Mass Ejections (CMEs) in the interplanetary medium have been evaluated so far in terms of an empirical drag coefficient $C_{\rm D} \sim 1$ that quantifies the role of the aerodynamic drag experienced by a typical CME ...
Borgazzi, Andrea +2 more
core +1 more source
Advanced Functional Materials, EarlyView.Reprogrammable multi‐material smart textiles knitted from liquid crystal elastomer fibers undergo 2D and 3D deformation under thermal and photo stimuli. Circularly knitted tubular structures reversibly contract in radial and axial directions, enabling autonomous climbing, liquid release, and micro pumping.
Xue Wan +8 more
wiley +1 more source
Evaluation drag coefficients for circular patch vegetation with different riverbed roughness
Cogent Engineering, 2022 The drag coefficient of a one-line circular patch of emergent sparse vegetation in an open-channel flow or riverbeds with varying bed roughness sizes was experimentally investigated.
Karim R. Gubashi +3 more
doaj +1 more source
Energy and momentum relaxation of heavy fermion in dense and warm plasma
, 2010 We determine the drag and the momentum diffusion coefficients of heavy fermion in dense plasma. It is seen that in degenerate matter drag coefficient at the leading order mediated by transverse photon is proportional to $(E-\mu)^2$ while for the ...
Abhee K. Dutt-Mazumder +5 more
core +1 more source