Results 21 to 30 of about 21,991 (265)

Non-Hydrostatic RegCM4 (RegCM4-NH): model description and case studies over multiple domains [PDF]

Geoscientific Model Development, 2021
We describe the development of a non-hydrostatic version of the regional climate model RegCM4, called RegCM4-NH, for use at convection-permitting resolutions. The non-hydrostatic dynamical core of the Mesoscale Model MM5 is introduced in the RegCM4, with
E. Coppola, P. Stocchi, E. Pichelli, J. A. Torres Alavez, R. Glazer, G. Giuliani, F. Di Sante, R. Nogherotto, F. Giorgi   +8 more
doaj   +1 more source

Convective mass-flux from long term radar reflectivities over Darwin, Australia [PDF]

Journal of Geophysical Research: Atmospheres, 2021
AbstractMost cumulus parametrizations today make use of a simple conceptual model of convection, called the mass‐flux approach. This approach depicts convection as an ensemble of updrafts and downdrafts occurring within a model grid‐box. The aim of this study is to determine convective mass‐fluxes and their constituents on the scale of a 100 km GCM ...
Alessandro C. M. Savazzi, Christian Jakob, A. Pier Siebesma   +2 more
openaire   +4 more sources

Analysis of observation characteristic of FY-3 microwave hygrometer during an extreme short-term heavy precipitation process

暴雨灾害, 2020
Based on data of FY-3 satellite microwave hygrometer and conventional observation, microwave observational characteristics of convective clouds during a heavy precipitation event from Giuzhou to Hubei province in 2016 were analyzed. The results show that
Pingping ZHANG, shuangzhu XU, Liangpeng DONG, Mengmeng ZHANG   +3 more
doaj   +1 more source

Existence of Bounded Solutions for a Class of Degenerate Fourth-Order Elliptic Equations with Convection Terms

Mathematics
This paper deals with the existence of bounded and locally Hölder continuous weak solutions of the following nonlinear fourth-order Dirichlet problem: ∑|α|=1,2(−1)|α|DαAα(x,u,D1u,D2u)−Eα(x) |u|λ(pα−1) signu=f in Ω, where the coefficients Aα satisfy a ...
Salvatore D’Asero
doaj   +1 more source

Singular quasilinear elliptic problems with convection terms

AIP Conference Proceedings, 2022
In this paper we present some very recent results regarding existence, uniqueness, and multiplicity of solutions for quasilinear elliptic equations and systems, exhibiting both singular and convective reaction terms. The importance of boundary conditions (Dirichlet, Neumann, or Robin) is also discussed.
openaire   +2 more sources

Elliptic Problems with Superlinear Convection Terms

Journal of Differential Equations
In this manuscript we deal with elliptic equations with superlinear first order terms in divergence form of the following type \[ -\mbox{div}(M(x)\nabla u)= -\mbox{div}(h(u)E(x))+f(x), \] where $M$ is a bounded elliptic matrix, the vector field $E$ and the function $f$ belong to suitable Lebesgue spaces, and the function $s\to h(s)$ features a ...
Boccardo, Lucio, Buccheri, Stefano, Cirmi, Giuseppa Rita   +2 more
openaire   +5 more sources

Nonlinear degenerate elliptic equations with a convection term

Journal of Elliptic and Parabolic Equations, 2022
AbstractWe prove some existence and regularity results for the solutions of the Dirichlet problem associated with a nonlinear degenerate elliptic equation with a convection term.
giuseppa rita Cirmi, salvatore D'Asero
openaire   +3 more sources

Convective Cold Pools in Long-Term Boundary Layer Mast Observations

Monthly Weather Review, 2021
AbstractCold pools are mesoscale features that are key for understanding the organization of convection, but are insufficiently captured in conventional observations. This study conducts a statistical characterization of cold-pool passages observed at a 280-m-high boundary layer mast in Hamburg (Germany) and discusses factors controlling their signal ...
Kirsch, B., Ament, F., Hohenegger, C.
openaire   +2 more sources

Investigation of Oxygen‐Free Wetting Behavior of Aluminum on Copper via Molecular Dynamics Simulations and Experiments

Advanced Engineering Materials, EarlyView.
The wettability of aluminum droplets (Al) on different copper substrates (Cu), where liquid Al spreads on solid Cu surfaces to form a liquid–solid interface, is studied numerically and experimentally. The experimental and numerical results show good agreement in the fast‐spreading regime.
Shan Lyu, Timon Steinhoff, Finn‐Lennard Janthur, Sarah Seffer, Jörg Hermsdorf, Christian Klose, Ludger Overmeyer, Hans‐Jürgen Maier, Nina Merkert   +8 more
wiley   +1 more source

Cool Kitchen: Processing Starch and Eggshell Powder into Sustainable Coatings for Passive Daytime Cooling

Advanced Functional Materials, EarlyView.
A food‐grade cooling composite made from starch and recycled eggshell powder offers a scalable, ultra‐low‐cost solution for passive daytime radiative cooling. Easily prepared using basic kitchen tools, this material empowers communities, even in areas with limited infrastructure, to stay cooler during worsening summer heat waves.
Qimeng Song, Evelyn Kubacki, Alexander Berger, Markus Retsch   +3 more
wiley   +1 more source