scholarly journals Materials for Radiative Cooling: A Review

2017 ◽  
Vol 38 ◽  
pp. 752-759 ◽  
Author(s):  
Roxana Family ◽  
M. Pinar Mengüç
Keyword(s):  
Radiative Cooling

Saturation mechanism and generated viscosity in gravito-turbulent accretion disks

2020 ◽  
Vol 640 ◽  
pp. A53
Author(s):  
L. Löhnert ◽  
S. Krätschmer ◽  
A. G. Peeters
Keyword(s):  
Growth Rate ◽  
Numerical Simulations ◽  
Accretion Disks ◽  
Gravitational Instability ◽  
Turbulent Viscosity ◽  
Radial Distance ◽  
Maximum Growth ◽  
Wave Number ◽  
Radiative Cooling ◽  
Mixing Length

Here, we address the turbulent dynamics of the gravitational instability in accretion disks, retaining both radiative cooling and irradiation. Due to radiative cooling, the disk is unstable for all values of the Toomre parameter, and an accurate estimate of the maximum growth rate is derived analytically. A detailed study of the turbulent spectra shows a rapid decay with an azimuthal wave number stronger than ky−3, whereas the spectrum is more broad in the radial direction and shows a scaling in the range kx−3 to kx−2. The radial component of the radial velocity profile consists of a superposition of shocks of different heights, and is similar to that found in Burgers’ turbulence. Assuming saturation occurs through nonlinear wave steepening leading to shock formation, we developed a mixing-length model in which the typical length scale is related to the average radial distance between shocks. Furthermore, since the numerical simulations show that linear drive is necessary in order to sustain turbulence, we used the growth rate of the most unstable mode to estimate the typical timescale. The mixing-length model that was obtained agrees well with numerical simulations. The model gives an analytic expression for the turbulent viscosity as a function of the Toomre parameter and cooling time. It predicts that relevant values of α = 10−3 can be obtained in disks that have a Toomre parameter as high as Q ≈ 10.

A SIMPLIFIED PANEL FOR BOTH DIURNAL PHOTOVOLTAIC CONVERSION AND NOCTURNAL RADIATIVE COOLING

2018 ◽  
Author(s):  
Bin Zhao ◽  
Mingke Hu ◽  
Xianze Ao ◽  
Gang Pei
Keyword(s):  
Radiative Cooling ◽  
Photovoltaic Conversion

Cellulose-Based Hybrid Structural Material for Radiative Cooling

Nano Letters ◽  
2020 ◽  
Author(s):  
Yipeng Chen ◽  
Baokang Dang ◽  
Jinzhou Fu ◽  
Chao Wang ◽  
Caicai Li ◽  
...  
Keyword(s):  
Structural Material ◽  
Radiative Cooling

scholarly journals Wearable Optoelectronics: Outdoor‐Useable, Wireless/Battery‐Free Patch‐Type Tissue Oximeter with Radiative Cooling (Adv. Sci. 10/2021)

2021 ◽  
Vol 8 (10) ◽  
pp. 2170057
Author(s):  
Min Hyung Kang ◽  
Gil Ju Lee ◽  
Joong Hoon Lee ◽  
Min Seok Kim ◽  
Zheng Yan ◽  
...  
Keyword(s):  
Radiative Cooling ◽  
Patch Type

scholarly journals Adaptive covers for combined radiative cooling and solar heating. A review of existing technology and materials

2021 ◽  
Vol 230 ◽  
pp. 111275
Author(s):  
Roger Vilà ◽  
Ingrid Martorell ◽  
Marc Medrano ◽  
Albert Castell
Keyword(s):  
Solar Heating ◽  
Radiative Cooling

Scalable and Flexible Electrospun Film for Daytime Subambient Radiative Cooling

2021 ◽  
Author(s):  
Weilong Jing ◽  
Shuai Zhang ◽  
Wei Zhang ◽  
Zhang Chen ◽  
Canying Zhang ◽  
...  
Keyword(s):  
Radiative Cooling

scholarly journals Quasi-periodic selective multilayer emitter for sub-ambient daytime radiative cooling

AIP Advances ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 025109
Author(s):  
Yeqing Zhu ◽  
Yong-Hong Ye ◽  
Dong Wang ◽  
Yurong Cao
Keyword(s):  
Radiative Cooling
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