نتایج جستجو برای: astrophysical fluid dynamics
تعداد نتایج: 643320 فیلتر نتایج به سال:
We have performed research on the design of new algorithms and improvement of existing algorithms for high order accurate finite difference and finite volume weighted essentially non-oscillatory (WENO) schemes and discontinuous Galerkin finite element methods, for solving partial differential equations with discontinuous, rapidly changing, or multiscale solutions. Applications to computational ...
Reflection energy from a linear reflector comes from an integrant over an aperture often described by the Fresnel zone. Within the Fresnel zone, the diffraction energy constructively builds the reflection energy. This paper uses diffraction theory to explain the reflector edge effect on amplitude and the amplitude variation within the Fresnel zone. Thus, discuss the Fresnel zone effect for AVO ...
Factors affecting vehicle occupancy measurement were examined with the aim of improving state vehicle occupancy monitoring programs. A comparison was conducted of five data sets looking at the effects on average vehicle occupancy (AVO) of time of day, day of week, road types, HOV lanes, locational differences, and traffic volume. It was found that AVO was higher in the afternoons, on Saturdays,...
In my reply I present a re-analysis of the data of the Smithsonian Astrophysical Observatory (SAO). For this, a new data reduction method is introduced, allowing a drastic lowering of data scatter, so that the time series of the reduced data clearly shows the ≈ 1% variation of the terrestric solar irradiance in parallel with solar activity. The implications are discussed.
Abstract Gravitational vacuum condensate stars, also known as gravastars, have been proposed an alternative to black holes. Their interior contains a perfect fluid with equation of state akin that cosmological constant. For this reason, they recently considered possible astrophysical source dark energy. In work we argue gravitational stars cannot be the energy and highlight direct coupling thei...
9 CHAPTER
We present a case study of validating an astrophysical simulation code. Our study focuses on validating FLASH, a parallel, adaptive-mesh hydrodynamics code for studying the compressible, reactive flows found in many astrophysical environments. We describe the astrophysics problems of interest and the challenges associated with simulating these problems. We describe methodology and discuss solut...
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