Results 1 to 10 of about 221,050 (74)

Optimization of Sparse Sensor Placement for Estimation of Wind Direction and Surface Pressure Distribution Using Time-Averaged Pressure-Sensitive Paint Data on Automobile Model [PDF]

Journal of Wind Engineering and Industrial Aerodynamics Volume 227, August 2022, 105043, 2022
This study proposes a method for predicting the wind direction against the simple automobile model (Ahmed model) and the surface pressure distributions on it by using data-driven optimized sparse pressure sensors. Positions of sparse pressure sensor pairs on the Ahmed model were selected for estimation of the yaw angle and reconstruction of pressure ...
arxiv   +1 more source

Pressure-induced volumetric negative thermal expansion in CoZr2 superconductor [PDF]

, 2023
We investigate the thermal expansion and superconducting properties of a CuAl2-type (tetragonal) superconductor CoZr2 under high pressures. We perform high-pressure synchrotron X-ray diffraction in a pressure range of 2.9 GPa < P < 10.4 GPa and discover that CoZr2 exhibits volumetric negative thermal expansion under high pressures.
arxiv   +1 more source

Topological pressures for $ε$-stable and stable sets [PDF]

Pacific J. Math. 263 (2013) 117-142, 2010
Topological pressures of the preimages of $\epsilon$-stable sets and some certain closed subsets of stable sets in positive entropy systems are investigated. It is showed that the topological pressure of any topological system can be calculated in terms of the topological pressure of the preimages of $\epsilon$-stable sets.
arxiv   +1 more source

Pressure of thermal excitations in superfluid helium [PDF]

J. Phys.: Condens. Matter 20, 245103 (2008), 2012
We find the pressure, due to the thermal excitations of superfluid helium, at the interface with a solid. The separate contributions of phonons, $R^-$ rotons and $R^+$ rotons are derived. The pressure due to $R^-$ rotons is shown to be negative and partially compensates the positive contribution of $R^+$ rotons, so the total roton pressure is positive ...
arxiv   +1 more source

Observation of superconductivity in pressurized Weyl semimetal candidate TaIrTe4 [PDF]

Phys. Rev. B 99, 020503 (2019), 2018
Here we report the observation of superconductivity in pressurized type-II Weyl semimetal (WSM) candidate TaIrTe4 by means of complementary high-pressure transport and synchrotron X-ray diffraction measurements. We find that TaIrTe4 shows superconductivity with transition temperature (TC) of 0.57 K at the pressure of ~23.8 GPa.
arxiv   +1 more source

Raman excitation spectroscopy of carbon nanotubes: effects of pressure medium and pressure [PDF]

High Pressure Research, iFirst, 1-5 (2012), 2012
Raman excitation and emission spectra for the radial breathing mode (RBM) are reported, together with a preliminary analysis. From the position of the peaks on the two-dimensional plot of excitation resonance energy against Raman shift, the chiral indices (m, n) for each peak are identified.
arxiv   +1 more source

Nano-Confinement Effects on Liquid Pressure [PDF]

Physics of Fluids 33, 042007 (2021), 2020
In this work, molecular dynamics simulations are performed to estimate the equilibrium pressure of liquid confined in nanopores. The simulations show that the pressure is highly sensitive to the pore size and can significantly change from absolute positive to negative values for a very small (0.1 nm) change in pore size. The contribution from the solid-
arxiv   +1 more source

First principles investigation of pressure related quantum transport in pure black phosphorus devices [PDF]

, 2018
We propose a first-principles calculation to investigate the pressure-related transport properties of two kinds of pure monolayer black phosphorus (MBP) devices. Numerical results show that semi-conducting MBP can withstand a considerable compression pressure until it is transformed to be a conductor.
arxiv   +1 more source

Ideal bulk pressure of active Brownian particles [PDF]

Phys. Rev. E 93, 062605 (2016), 2015
The extent to which active matter might be described by effective equilibrium concepts like temperature and pressure is currently being discussed intensely. Here we study the simplest model, an ideal gas of non-interacting active Brownian particles.
arxiv   +1 more source

Path-integral simulation of ice Ih: The effect of pressure [PDF]

Phys. Rev. B 84, 224112 (2011), 2012
The effect of pressure on structural and thermodynamic properties of ice Ih has been studied by means of path-integral molecular dynamics simulations at temperatures between 50 and 300 K. Interatomic interactions were modeled by using the effective q-TIP4P/F potential for flexible water. Positive (compression) and negative (tension) pressures have been
arxiv   +1 more source