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After the companion dynamically plunges through the primary's envelope, the two cores remain surrounded by a common envelope and the decrease of the orbital period $P_\text{orb}$ stalls. The subsequent evolution has never been…

Solar and Stellar Astrophysics · Physics 2023-06-14 Damien Gagnier , Ondřej Pejcha

Experiments are conducted in a laboratory flume on the propagation of a surface wave against unidirectional flow with a sediment bed. This paper presents the spatial variation of bed forms induced by the wave-blocking phenomenon by a…

Fluid Dynamics · Physics 2019-05-22 Debasmita Chatterjee , Subir Ghosh , B. S. Mazumder , K. Sarkar

We build a rigorous statistical framework to provide constraints on the chemical and dust evolution parameters for nearby late-type galaxies with a wide range of gas fractions ($3\%<f_g<94\%$). A Bayesian Monte Carlo Markov Chain framework…

Astrophysics of Galaxies · Physics 2021-07-08 P. De Vis , S. J. Maddox , H. L. Gomez , A. P. Jones , L. Dunne

We apply a model for sand dunes to calculate formation of dunes on Mars under the present Martian atmospheric conditions. We find that different dune shapes as those imaged by Mars Global Surveyor could have been formed by the action of…

Other Condensed Matter · Physics 2009-11-13 Eric J. R. Parteli , Hans J. Herrmann

Hydrodynamical simulations of semi-detached, polytropic binary stars are presented in an effort to study the onset and stability of dynamical mass transfer events. Initial, synchronously rotating equilibrium models are constructed using a…

Astrophysics · Physics 2009-11-13 Mario C. R. D'Souza , Patrick M. Motl , Joel E. Tohline , Juhan Frank

A systematic study based on the self-consistent dynamical simulations is presented for the spontaneous evolution of flat solid droplets (bumps), which are driven by the surface drift diffusion induced by the capillary and mismatch stresses,…

Materials Science · Physics 2010-10-22 Tarik Omer Ogurtani , Aytac Celik , Ersin Emre Oren

Gravity-driven size segregation is important in mountain streams where a wide range of grain sizes are transported as bedload. More particularly, vertical size segregation is a multi-scale process that originates in interactions at the…

Fluid Dynamics · Physics 2021-04-28 Hugo Rousseau , Rémi Chassagne , Julien Chauchat , Raphael Maurin , Philippe Frey

We present a theoretical study for the intermediate stages of the growth of membranes and vesicles in supersaturated solutions of amphiphilic molecules. The problem presents important differences with the growth of droplets in the classical…

Condensed Matter · Physics 2009-10-28 A. M. Somoza , U. Marini Bettolo Marconi , P. Tarazona

The hydrodynamic evolution of the common envelope phase of a low mass binary composed of a 1.05 Msun red giant and a 0.6 Msun companion has been followed for five orbits of the system using a high resolution method in three spatial…

Solar and Stellar Astrophysics · Physics 2015-05-28 Paul M. Ricker , Ronald E. Taam

In zones of loose sand, wind-blown sand dunes emerge due the linear instability of a flat sedimentary bed. This instability has been studied in experiments and numerical models but rarely in the field, due to the large time and length…

We investigate the sedimentation and vertical hydraulic transport of irregular polymetallic nodules (PMNs) using resolved CFD-DEM with multisphere particles spanning $100 < Re_p < 3000$. Shape effects induce 2.0-2.3 times drag enhancement…

Granular media are frequently found in nature and in industry and their transport by a fluid flow is of great importance to human activities. One case of particular interest is the transport of sand in open-channel and river flows. In many…

Fluid Dynamics · Physics 2016-08-23 Erick de Moraes Franklin

We present the to-date largest parameter space exploration of binaries in circumbinary disks (CBDs), deriving orbital evolution prescriptions for eccentric, unequal mass binaries from our suite of hydrodynamic simulations. In all cases,…

High Energy Astrophysical Phenomena · Physics 2023-04-26 Magdalena Siwek , Rainer Weinberger , Lars Hernquist

The coupling of sediment transport with the flow that drives it allows rivers to shape their own bed. Cross-stream fluxes of sediment play a crucial, yet poorly understood, role in this process. Here, we track particles in a laboratory…

Fluid Dynamics · Physics 2019-07-04 A. Abramian , O. Devauchelle , G. Seizilles , E. Lajeunesse

Embryogenesis is a multiscale process during which developmental symmetry breaking transitions give rise to complex multicellular organisms. Recent advances in high-resolution live-cell microscopy provide unprecedented insights into the…

Biological Physics · Physics 2023-06-27 Nicolas Romeo , Alasdair Hastewell , Alexander Mietke , Jörn Dunkel

We present a new database of $>$300 layer-orientations from sedimentary mounds on Mars. These layer orientations, together with draped landslides, and draping of rocks over differentially-eroded paleo-domes, indicate that for the…

Earth and Planetary Astrophysics · Physics 2017-04-03 Edwin S. Kite , Jonathan Sneed , David P. Mayer , Kevin W. Lewis , Timothy I. Michaels , Alicia Hore , Scot C. R. Rafkin

A continuum grain boundary model is developed that uses experimentally measured grain boundary energy data as a function of misorientation to simulate idealized grain boundary evolution in a 1-D grain array. The model uses a continuum…

Materials Science · Physics 2024-01-29 Syed Ansari , Amit Acharya , Alankar Alankar

The internal behaviour of debris flows provides fundamental insight into the mechanics responsible for their motion. We provide velocity data within a small-scale experimental debris flow, consisting of the instantaneous release of a…

Fluid Dynamics · Physics 2020-03-26 Caitlin M. Chalk , Jeffrey Peakall , Gareth Keevil , Raul Fuentes

The three-dimensional transport pathways, the time scales of vertical transport, and the dispersion characteristics of submesoscale currents at an upper-ocean front are investigated using material points (tracer particles) that advect with…

Atmospheric and Oceanic Physics · Physics 2021-08-18 Vicky Verma , Sutanu Sarkar

Stellar feedback plays a crucial role in regulating baryon cycles of a galactic ecosystem, and may manifest itself in the formation of superbubbles in the interstellar medium. In this work, we used a set of high-resolution simulations to…

Astrophysics of Galaxies · Physics 2024-03-20 Chengzhe Li , Hui Li , Wei Cui , Federico Marinacci , Laura V. Sales , Mark Vogelsberger , Paul Torrey