Hydrodynamic simulations and biological modelling of an Anammox reactor

2017 ◽  
Vol 93 (4) ◽  
pp. 1190-1197 ◽  
Author(s):  
Albert Vilà-Rovira ◽  
Maël Ruscalleda ◽  
M Dolors Balaguer ◽  
Jesús Colprim
Keyword(s):  
Hydrodynamic Simulations ◽  
Biological Modelling

Coupling Multiphase Hydrodynamic Simulations and Biological Modelling of an Anammox Reactor

2017 ◽  
pp. 701-705
Author(s):  
A. Vilà-Rovira ◽  
M. Ruscalleda ◽  
M. D. Balaguer ◽  
J. Colprim
Keyword(s):  
Hydrodynamic Simulations ◽  
Biological Modelling

scholarly journals Two‐Dimensional Multiangle, Multigroup Neutrino Radiation‐Hydrodynamic Simulations of Postbounce Supernova Cores

2008 ◽  
Vol 685 (2) ◽  
pp. 1069-1088 ◽  
Author(s):  
Christian D. Ott ◽  
Adam Burrows ◽  
Luc Dessart ◽  
Eli Livne
Keyword(s):  
Two Dimensional ◽  
Hydrodynamic Simulations ◽  
Neutrino Radiation

scholarly journals GJ 436b and the stellar wind interaction: simulations constraints using Lyα and Hα transits

2020 ◽  
Author(s):  
Carolina Villarreal D’Angelo ◽  
Aline A Vidotto ◽  
Alejandro Esquivel ◽  
Gopal Hazra ◽  
Allison Youngblood
Keyword(s):  
Mass Loss ◽  
Stellar Wind ◽  
Planetary System ◽  
Neutral Hydrogen ◽  
Hydrogen Atmosphere ◽  
Planetary Atmosphere ◽  
Hydrodynamic Simulations ◽  
Stellar Disc ◽  
Planetary Mass ◽  
Best Fit

Abstract The GJ 436 planetary system is an extraordinary system. The Neptune-size planet that orbits the M3 dwarf revealed in the Lyα line an extended neutral hydrogen atmosphere. This material fills a comet-like tail that obscures the stellar disc for more than 10 hours after the planetary transit. Here, we carry out a series of 3D radiation hydrodynamic simulations to model the interaction of the stellar wind with the escaping planetary atmosphere. With these models, we seek to reproduce the $\sim 56\%$ absorption found in Lyα transits, simultaneously with the lack of absorption in Hα transit. Varying the stellar wind strength and the EUV stellar luminosity, we search for a set of parameters that best fit the observational data. Based on Lyα observations, we found a stellar wind velocity at the position of the planet to be around [250-460] km s−1 with a temperature of [3 − 4] × 105 K. The stellar and planetary mass loss rates are found to be 2 × 10−15 M⊙ yr−1 and ∼[6 − 10] × 109 g s−1, respectively, for a stellar EUV luminosity of [0.8 − 1.6] × 1027 erg s−1. For the parameters explored in our simulations, none of our models present any significant absorption in the Hα line in agreement with the observations.

scholarly journals The Modified Void Nucleation and Growth Model (MNAG) for Damage Evolution in BCC Ta

2021 ◽  
Vol 11 (8) ◽  
pp. 3378
Author(s):  
Jie Chen ◽  
Darby J. Luscher ◽  
Saryu J. Fensin
Keyword(s):  
Growth Model ◽  
Damage Evolution ◽  
Volume Fraction ◽  
Void Nucleation ◽  
Nucleation And Growth ◽  
Void Coalescence ◽  
Hydrodynamic Simulations ◽  
Void Evolution ◽  
Void Nucleation And Growth ◽  
Nucleation Growth

A void coalescence term was proposed as an addition to the original void nucleation and growth (NAG) model to accurately describe void evolution under dynamic loading. The new model, termed as modified void nucleation and growth model (MNAG model), incorporated analytic equations to explicitly account for the evolution of the void number density and the void volume fraction (damage) during void nucleation, growth, as well as the coalescence stage. The parameters in the MNAG model were fitted to molecular dynamics (MD) shock data for single-crystal and nanocrystalline Ta, and the corresponding nucleation, growth, and coalescence rates were extracted. The results suggested that void nucleation, growth, and coalescence rates were dependent on the orientation as well as grain size. Compared to other models, such as NAG, Cocks–Ashby, Tepla, and Tonks, which were only able to reproduce early or later stage damage evolution, the MNAG model was able to reproduce all stages associated with nucleation, growth, and coalescence. The MNAG model could provide the basis for hydrodynamic simulations to improve the fidelity of the damage nucleation and evolution in 3-D microstructures.

scholarly journals INVESTIGATIONS OF PROTOSTELLAR OUTFLOW LAUNCHING AND GAS ENTRAINMENT: HYDRODYNAMIC SIMULATIONS AND MOLECULAR EMISSION

2014 ◽  
Vol 784 (1) ◽  
pp. 61 ◽  
Author(s):  
Stella S. R. Offner ◽  
Héctor G. Arce
Keyword(s):  
Hydrodynamic Simulations ◽  
Molecular Emission ◽  
Gas Entrainment

Internal Alignment of the Halos of Disk Galaxies in Cosmological Hydrodynamic Simulations

2005 ◽  
Vol 627 (1) ◽  
pp. L17-L20 ◽  
Author(s):  
Jeremy Bailin ◽  
Daisuke Kawata ◽  
Brad K. Gibson ◽  
Matthias Steinmetz ◽  
Julio F. Navarro ◽  
...  
Keyword(s):  
Disk Galaxies ◽  
Hydrodynamic Simulations

scholarly journals Radiative hydrodynamic simulations of acoustic waves in sunspots

2004 ◽  
Vol 2004 (IAUS223) ◽  
pp. 445-446
Author(s):  
S. Bard ◽  
M. Carlsson
Keyword(s):  
Acoustic Waves ◽  
Hydrodynamic Simulations
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