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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Microphysical and non-thermal processes in the circumgalactic medium: turbulence, magnetic fields and cosmic rays
银河系 周介质 微物理 非热过程 湍流 磁场 宇宙射线
2023/4/18
Multiphase gas structure is ubiquitous in our universe. Recent observations suggest that large quantities of cool (10^4 K) gas are detected in the circumgalactic medium (CGM) of galaxy halos, which ex...
Fusion, which promises practically unlimited, carbon-free energy using the same processes that power the sun, is at the heart of a worldwide research effort that could help mitigate climate change.
Turbulence is everywhere -- it rattles our airplanes and makes tiny whirlpools in our bathtubs -- but it's one of the least understood phenomena in physics.Turbulence occurs when an ordered fluid flow...
Study sheds light on turbulence in astrophysical plasmas（图）
sheds light turbulence astrophysical plasmas
2017/12/19
Plasmas, gas-like collections of ions and electrons, make up an estimated 99 percent of the visible matter in the universe, including the sun, the stars, and the gaseous medium that permeates the spac...
Extreme Turbulence Roiling 'Most Luminous Galaxy' in the Universe
Extreme Turbulence Roiling Most Luminous Galaxy the Universe
2016/1/22
The most luminous galaxy in the Universe – a so-called obscured quasar 12.4 billion light-years away – is so violently turbulent that it may eventually jettison its entire supply of star-forming gas, ...
Extreme Turbulence Roiling 'Most Luminous Galaxy' in the Universe
Extreme Turbulence Most Luminous Galaxy the Universe
2016/2/22
The most luminous galaxy in the Universe – a so-called obscured quasar 12.4 billion light-years away – is so violently turbulent that it may eventually jettison its entire supply of star-forming gas, ...
As anyone who has experienced turbulence knows, its onset and departure are abrupt, and how long it lasts seems to be unpredictable. Fast flowing fluids are always turbulent, but at slower speeds the ...
Marine Turbulence—Theories,Models,and Observations,Results of the CARTUM Project
Marine Turbulence Theories Models Observations CARTUM Project
2015/7/28
Ocean turbulence is a rich and fascinating field of study, both for its own sake and in the service of large-scale circulation and climate modeling efforts. Marine Turbulence is a collection of chapte...
Turbulence Observations in a Buoyant Hydrothermal Plume on the East Pacific Rise
Turbulence Observations Buoyant Hydrothermal Plume East Pacific Rise
2015/7/14
Hot vent fluid enters the ocean at high-temperature hydrothermal vents, also known as black smokers. Because of the large temperature difference between the vent fluid and oceanic near-bottom waters, ...
Kelvin-Wave Cascade and Decay of Superfluid Turbulence
Kelvin wave distortion vortex line cryogenic superfluid turbulence dynamics
2014/12/20
Kelvin waves (kelvons), the distortion waves on vortex lines, play a key part in the relaxation of superfluid turbulence at low temperatures. We present a weak-turbulence theory of kelvons. We show th...
Scale-Separation Scheme for Simulating Superfluid Turbulence: Kelvin-Wave Cascade
Kelvin from the distorted wave of vortex superfluid turbulence low temperature the numerical simulation of vortex line
2014/12/20
A Kolmogorov-type cascade of Kelvin waves—the distortion waves on vortex lines—plays a key part in the relaxation of superfluid turbulence at low temperatures. We propose an efficient numeric scheme f...
Scanning Superfluid-Turbulence Cascade by its Low-Temperature Cutoff
Kolmogorov low temperature quantization the vortex line density coefficient of friction
2014/12/19
On the basis of a recently proposed scenario of the transformation of the Kolmogorov cascade into the Kelvin-wave cascade, we develop a theory of low-temperature cutoff. The theory predicts a specific...
Kolmogorov and Kelvin-wave cascades of superfluid turbulence at T=0: What lies between
Vorticity quantitative long wave physics super fluid turbulent flow the vortex line
2014/12/19
As long as vorticity quantization remains irrelevant for long-wave physics, superfluid turbulence supports a regime macroscopically identical to the Kolmogorov cascade of a normal liquid. At high enou...
Coupling a new turbulence parametrization to RegCM adds realistic stratocumulus clouds
turbulence parametrization RegCM adds realistic stratocumulus
2014/12/10
To model stratocumulus clouds in the regional climate model, RegCM4.1, the University of Washington (UW)
turbulence parametrization has been coupled to RegCM. We
describe improvements in RegCM’s coa...
Unified parameterization of the planetary boundary layer and shallow convection with a higher-order turbulence closure in the Community Atmosphere Model: single-column experiments
the planetary boundary layer higher-order turbulence closure Community Atmosphere Model single-column experiments
2014/12/10
This paper describes the coupling of the Community Atmosphere Model (CAM) version 5 with a unified multi-variate probability density function (PDF) parameterization, Cloud Layers Unified by Binormals ...