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Global non-hydrostatic atmospheric models are becoming increasingly important for studying the climates of planets and exoplanets. However, such models suffer from computational difficulties due to the large aspect ratio between the…

Earth and Planetary Astrophysics · Physics 2020-08-12 Huazhi Ge , Cheng Li , Xi Zhang , Dongwook Lee

The geospace environment is volatile and highly driven. Space weather has effects on Earth's magnetosphere that cause a dynamic and enigmatic response in the thermosphere, particularly on the evolution of neutral mass density. Many models…

Space Physics · Physics 2023-06-07 Richard J. Licata , Piyush M. Mehta

Demand flexibility is increasingly important for power grids. Careful coordination of thermostatically controlled loads (TCLs) can modulate energy demand, decrease operating costs, and increase grid resiliency. We propose a novel…

Systems and Control · Electrical Eng. & Systems 2020-12-09 Bingqing Chen , Jonathan Francis , Marco Pritoni , Soummya Kar , Mario Bergés

Recently, meshless methods have become popular in numerically solving partial differential equations and have been employed to solve equations governing fluid flows, heat transfer, and species transport. In the present study, a numerical…

Fluid Dynamics · Physics 2024-04-18 Akash Unnikrishnan , Vinod Narayanan , Surya Pratap Vanka

We consider the Lorenz equations, a system of three dimensional ordinary differential equations modeling atmospheric convection. These equations are chaotic and hard to study even numerically, and so a simpler "geometric model" has been…

Dynamical Systems · Mathematics 2024-05-14 Tali Pinsky

We use a linear shallow-water model to investigate the global circulation of the atmospheres of tidally locked planets. Simulations, observations, and simple models show that if these planets are sufficiently rapidly rotating, their…

Earth and Planetary Astrophysics · Physics 2018-12-26 Mark Hammond , Raymond T. Pierrehumbert

The harsh environment on the lunar surface presents unique technological challenges for space exploration. This paper presents research on the design and development of the Tele- scope-deployment High-vacuum teleOperated Rover (THOR),…

Instrumentation and Methods for Astrophysics · Physics 2014-12-12 Chris Womack , Miles Crist , Laura Kruger , Kelsey DeGeorge , Karynna Tuan , Jack Burns

We use an idealized three-dimensional general circulation model to study condensible-rich atmospheres with an ineffective cold trap on slowly rotating tidally locked terrestrial planets. In particular, we show the climate dynamics in a thin…

Earth and Planetary Astrophysics · Physics 2020-10-05 Feng Ding , Raymond T. Pierrehumbert

We construct a class of global, dynamical solutions to the 3d Euler equations near the stationary state given by uniform "rigid body" rotation. These solutions are axisymmetric, of Sobolev regularity, have non-vanishing swirl and scatter…

Analysis of PDEs · Mathematics 2022-10-10 Yan Guo , Benoit Pausader , Klaus Widmayer

This paper describes the Habitable Energy balance model for eXoplaneT ObseRvations (HEXTOR), which is a model for calculating latitudinal temperature profiles on Earth and other rapidly rotating planets. HEXTOR includes a lookup table…

Earth and Planetary Astrophysics · Physics 2022-03-07 Jacob Haqq-Misra , Benjamin P. C. Hayworth

The complexity of atmospheric modelling and its inherent non-linearity, together with the limited amount of data of exoplanets available, motivate model intercomparisons and benchmark tests. In the geophysical community, the Held-Suarez…

Earth and Planetary Astrophysics · Physics 2015-05-20 Kevin Heng , Kristen Menou , Peter J. Phillipps

We present a new version of our code for modeling the atmospheric circulation on gaseous exoplanets, now employing a "double-gray" radiative transfer scheme, which self-consistently solves for fluxes and heating throughout the atmosphere,…

Earth and Planetary Astrophysics · Physics 2015-06-03 Emily Rauscher , Kristen Menou

In this work, we propose a modified Newton dynamics (MOND) model to study the rotation curves of galaxies. The model is described by an arctangent interpolating function and it fits the rotation curves of several galaxies without invoking…

General Relativity and Quantum Cosmology · Physics 2025-03-03 Ana C. M. Ciqueira , Geanderson A. Carvalho , Paulo H. Faccin , Fabrício T. Dalmolin

The atmospheric circulation models are deduced from the very complex atmospheric circulation models based on the actual background and meteorological data. The models are able to show features of atmospheric circulation and are easy to be…

Analysis of PDEs · Mathematics 2015-01-09 Hong Luo

3D modifications to the well-studied 2D flow topology around an embedded planet have the potential to resolve long-standing problems in planet formation theory. We present a detailed analysis of the 3D isothermal flow field around a 5…

Earth and Planetary Astrophysics · Physics 2015-09-30 Jeffrey Fung , Pawel Artymowicz , Yanqin Wu

The three-dimensional characterization of magnetic flux-ropes observed in the heliosphere has been a challenging task for decades. This is mainly due to the limitation to infer the 3D global topology and the physical properties from the 1D…

Solar and Stellar Astrophysics · Physics 2023-05-03 Teresa Nieves-Chinchilla , Miguel Angel Hidalgo , Hebe Cremades

Octo-Tiger is a code for modeling three-dimensional self-gravitating astrophysical fluids. It was particularly designed for the study of dynamical mass transfer between interacting binary stars. Octo-Tiger is parallelized for distributed…

Distributed, Parallel, and Cluster Computing · Computer Science 2021-10-22 Patrick Diehl , Gregor Daiß , Dominic Marcello , Kevin Huck , Sagiv Shiber , Hartmut Kaiser , Juhan Frank , Dirk Pflüger

The Aether-Scalar-Tensor (AeST) theory is an extension of General Relativity (GR) which can support Modified Newtonian Dynamics (MOND) behaviour in its static weak-field limit, and cosmological evolution resembling $\Lambda$CDM. We consider…

Cosmology and Nongalactic Astrophysics · Physics 2023-12-05 Amel Durakovic , Constantinos Skordis

Global hydrodynamic simulations of internal solar dynamics have focused on replicating the conditions for solar-like differential rotation and meridional circulation using the results of helioseismic inversions as a constraint. Inferences…

We present a three dimensional hot Jupiter model, extending from 200 bar to 1 mbar, using the Intermediate General Circulation Model from the University of Reading. Our horizontal spectral resolution is T31 (equivalent to a grid of 48x96),…

Earth and Planetary Astrophysics · Physics 2015-05-13 Emily Rauscher , Kristen Menou